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Monitoring saline intrusion in the Ayeyarwady Delta, Myanmar, using data from the Sentinel-2 satellite mission Paddy Water Environ. (IF 1.262) Pub Date : 2021-01-04 Toru Sakai, Keisuke Omori, Aung Naing Oo, Yan Naung Zaw
Summer rice cannot be grown near the coast of the Ayeyarwady Delta, Myanmar, because of the high salinity in river water during the dry season. This means that saline intrusion should be monitored to manage the irrigated rice-growing area. The aim of this study therefore is to develop a model to estimate the salinity of river water using satellite imagery. The imagery of Sentinel-2 was suitable for
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Effectiveness of ground bamboo mulching in suppressing weeds and enhancing rice production: a microcosm experiment Paddy Water Environ. (IF 1.262) Pub Date : 2021-01-03 Nisikawa Usio, Masfiro Lailati, Thien Quang Huynh, Yichen Shang, Koji Ito, Naoya Katsumi, Yumiko Mizuuchi, Masaya Ino
Bamboos have expanded their distribution in Japan in recent decades due to the abandonment of forest management practices following depopulation and aging in rural communities. Developing effective uses for bamboo biomass resources is highly desirable. In this study, we tested the effectiveness of ground bamboo as a new organic mulching material for agrochemical-free rice farming. Specifically, we
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Effect of biochar on the migration and leaching of phosphorus in black soil Paddy Water Environ. (IF 1.262) Pub Date : 2021-01-02 Yu Lv, Xinyu Zhao, Yeqin Shu, Hongyan Chang, Shanshan Zhao, Shuxia Liu
A method is presented for comparing the effect of corn-stalk biochar, rice-husk biochar and pine biochar on the migration and leaching of phosphorus in black soil. The process involves the addition of different biochar contents to black soil and research on soil column simulations. The results showed that pine biochar has a better effect on reducing the leaching volume, and the cumulative leaching
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Impacts of herbicides on weeds, water productivity, and nutrient-use efficiency in dry direct-seeded rice Paddy Water Environ. (IF 1.262) Pub Date : 2021-01-02 Suman Sen, Ramanjit Kaur, T. K. Das, Rishi Raj, Y. S. Shivay
Direct-seeded rice (DSR) is an emerging resource-saving rice production practice. It can be alternative to input-intensive conventional transplanted puddled rice, which has encountered problems, relating to water, nutrients, energy, and environment. DSR can save water, labour, and energy, reduce greenhouse gases emission and improve soil properties. But, weeds are major constraint, which can cause
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Damage characteristics of conduits in irrigation earth dams Paddy Water Environ. (IF 1.262) Pub Date : 2021-01-02 Yutaka Sawada, Junichi Arita, Masaki Omori, Toshinori Kawabata
In this study, we report the damage characteristics of conduits in irrigation earth dams based on the surveys conducted on four dams with different conduit types (cast-in-place and precast types) and diameters (600–1000 mm). The damage condition (cracks, leakage, and joint separation) and the deformation of conduits were observed using a self-propelled measuring system with an inertial measurement
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Effects of crop rotation on enhanced occurrence of arbuscular mycorrhizal fungi and soil carbon stocks of lowland paddy fields in seasonaly dry tropics Paddy Water Environ. (IF 1.262) Pub Date : 2020-11-25 T. M. Paranavithana, Svini Marasinghe, G. A. D. Perera, R. R. Ratnayake
The impacts of crop rotation systems on the arbuscular mycorrhizal fungal (AMF) spore density, mycorrhizal colonization of rice roots, soil C fractions and C stocks in seasonally dry climatic zone of Sri Lanka were examined in Rice–Soybean (RS) and Rice–Onion (RO) crop rotation systems during the subsequent rice cultivation season and, compared these with a rice monoculture, i.e. Rice–Rice (RR). The
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Determination of the most important meteorological parameters affecting the yield and biomass of barley and winter wheat using the random forest algorithm Paddy Water Environ. (IF 1.262) Pub Date : 2020-11-20 Abdol Rassoul Zarei, Mohammad Reza Mahmoudi, Ali Shabani, Mohammed Achite
Considering the very important role of climatic parameters on the yield and biomass of plants (especially in rain-fed agriculture), in this research, using data series of 9 stations during 1968–2017 the influence of 6 climatic parameters including the average of annual maximum and minimum temperature (Max-T and Min-T), the average of annual sunshine (Su-Sh), the average of annual relative humidity
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Assessment of paddy fields’ damage caused by Cyclone Nargis using MODIS time-series images (2004–2013) Paddy Water Environ. (IF 1.262) Pub Date : 2020-10-29 Keisuke Omori, Toru Sakai, Jun Miyamoto, Akihiko Itou, Aung Naing Oo, Akira Hirano
The Ayeyarwady Delta in the Bay of Bengal, the rice bowl of Myanmar, depends on natural conditions, especially rainfall. During the dry season, the delta’s coastal zone experiences saline water intrusion due to its low-lying topography. On May 2, 2008, Cyclone Nargis made landfall and crossed Ayeyarwady Region and Yangon City, affecting more than 50 townships and causing massive destruction of personal
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Reducing nitrogen leaching while enhancing growth, yield performance and physiological traits of rice by the application of controlled-release urea fertilizer Paddy Water Environ. (IF 1.262) Pub Date : 2020-10-24 El-Refaie Kenawy, Ali Hosny, Khalil Saad-Allah
Controlled-release urea fertilizer (CRUF) consists of urea granules intercalated within the lattice of a superabsorbent composite to control urea release thereby improving nitrogen supply and minimizing environmental hazards. In this work, new formulations for controlled-release urea were prepared based on biodegradable polymers and agricultural waste. Following CRUF preparation, the release behavior
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Investigating of the climatic parameters effectiveness rate on barley water requirement using the random forest algorithm, Bayesian multiple linear regression and cross-correlation function Paddy Water Environ. (IF 1.262) Pub Date : 2020-10-18 Abdol Rassoul Zarei, Mohammad Reza Mahmoudi, Ali Shabani
Due to the pressure on water resources, especially in agricultural sectors, evaluation of the effective strategies on decrease in water consumption has an applicable and important role in field water management. In this research, the effectiveness rate of the 7 climatic parameters on the water requirement of barley (amount of potential evapotranspiration of barley (PETB) during the growth period) using
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Spatiotemporal variation of sedimentation in an agricultural drainage canal with eco-friendly physical structures: a case study Paddy Water Environ. (IF 1.262) Pub Date : 2020-10-17 Shigeya Maeda, Shota Takagi, Koshi Yoshida, Hisao Kuroda
Excessive sediment deposition in eco-friendly physical structures introduced in agricultural canals sometimes damages the function of these structures as fish habitats. This study reports the spatial and temporal changes in bed elevation in a canal section where a set of six fish nests and one fish pool were installed. Field observations and numerical simulation using the two-dimensional hydrodynamic
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Benthic microalgae are more 13 C-depleted than phytoplankton in temperate flooded rice fields Paddy Water Environ. (IF 1.262) Pub Date : 2020-10-13 Natsuru Yasuno, Gen Kanaya, Yuya Takagi, Shuichi Shikano, Eisuke Kikuchi
We investigated seasonal changes in the δ13C levels of particulate organic matter (POM), which mainly consist of phytoplankton and microphytobenthos from three flooded rice fields treated with different types of fertilizer (chemical NPK, chemical PK, or organic fertilizers) in northeast Japan. Generally, microphytobenthos in lentic freshwater systems show higher levels of δ13C (about− 26‰) than phytoplankton
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Growth, yield and element-analysis of rice ( Oryza sativa L.), grown in soil amended with fly ash and municipal biosolids Paddy Water Environ. (IF 1.262) Pub Date : 2020-10-10 Chita Ranjan Sahoo, Rajani Kanta Sahu, Rabindra Nath Padhy
Rice was grown in soil co-amended with coal fly ash (FA) with municipal biosolids (MBS) to study the accumulation of heavy metal (HM) in rice seeds from FA with the co-amendment of MBS. Element-analyses of soil samples, plant-roots and seeds revealed the accumulation of HMs, Fe, Mn, Ni, Co, Zn, Cu and Pb proportionate to the FA doses. For ascertaining some suitable amendment-doses for maximal grain
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Implications of uncertainty in inflow forecasting on reservoir operation for irrigation Paddy Water Environ. (IF 1.262) Pub Date : 2020-10-06 K. S. Kasiviswanathan, K. P. Sudheer, Bankaru-Swamy Soundharajan, Adebayo J. Adeloye
Accurate and reliable forecasting of reservoir inflows is crucial for efficient reservoir operation to decide the quantity of the water to be released for various purposes. In this paper, an artificial neural network (ANN) model has been developed to forecast the weekly reservoir inflows along with its uncertainty, which was quantified through accounting the model’s input and parameter uncertainties
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Deep tillage and irrigation impacts on crop performance of direct seeded rice–wheat cropping system in north-west India Paddy Water Environ. (IF 1.262) Pub Date : 2020-09-30 Jeevanjot Dhaliwal, M. S. Kahlon, S. S. Kukal
The subsurface compact layer found in medium- to coarse-textured soils of rice-grown areas hampers the root growth of crops. Moreover, the puddled transplanted rice is being faced by water and labour shortages in the region. It is thus imperative to study the effects of deep tillage and irrigation regimes on crop performance of direct seeded rice (DSR) and wheat. A 2-year field experiment was conducted
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Underground behavior of overwintering Tokyo daruma pond frogs in early spring Paddy Water Environ. (IF 1.262) Pub Date : 2020-09-28 Naohisa Nakashima, Takumi Moriyama, Marina Motegi, Akira Mori, Keiji Watabe
Although Tokyo daruma pond frogs (Pelophylax porosus porosus) were once commonly observed throughout paddy fields in Japan, their populations have recently declined. The mode by which frogs survive during the overwintering period is largely unknown. In this study, we observed the underground behavior of 12 free-living Tokyo daruma pond frogs that overwintered in paddy soil and a dry field by periodically
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Issues of paddy stubble burning in Haryana: current perspective Paddy Water Environ. (IF 1.262) Pub Date : 2020-09-21 Sanjay, H. M. Swamy, Moro Seidu, Sangram B. Singh
Regardless of being useful in many ways, at the moment paddy stubble has turned out to be a nuisance in northwestern India, especially Haryana. Therefore, this study tried to access the scale of stubble burning, discover underlying causes, the existing condition of different in situ as well as ex situ utilization and management practices. Charting reasons for lower adoption of management techniques
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Effects of biochar amendment on greenhouse gas emission in two paddy soils with different textures Paddy Water Environ. (IF 1.262) Pub Date : 2020-09-17 Jieyun Liu, Husen Qiu, Cong Wang, Jianlin Shen, Wenzheng Zhang, Jiumao Cai, Hong Tang, Jinshui Wu
To study the greenhouse gas (GHG) emission with biochar amendment in two or more soils with different textures, an incubation experiment was carried out with two paddy soils (developed from granite-weathered red soil (S1) and from quaternary red clay (S2)) with different textures in flooding condition. The soils were subjected to the following three biochar (derived from wheat straw) treatments: 0%
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Improvement in canola yield and growth indices and water-use efficiency with subsurface drainage in a humid climate Paddy Water Environ. (IF 1.262) Pub Date : 2020-09-16 Ahmad Asgari, Abdullah Darzi-Naftchali, Mahdi Nadi, Seyed Farhad Saberali
Improving the productivity of limited land and water resources is necessary to meet the increasing demand for food and feed. A 2-year (2016–18) field study was conducted in a humid climate in the north of Iran to examine the effect of different drainage systems on green water-use efficiency (GWUE), economic water productivity (EWP) and yield and growth indices of winter canola. The treatments consisted
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Simulation of water temperature in paddy fields by a heat balance model using plant growth status parameter with interpolated weather data from weather stations Paddy Water Environ. (IF 1.262) Pub Date : 2020-09-14 Wenpeng Xie, Masaomi Kimura, Toshiaki Iida, Naritaka Kubo
Shallow-water temperature is an essential factor in various ecosystems, particularly in paddy fields, as damage to paddy rice due to high temperatures may severely affect grain yields. Here, a calculation scheme of paddy field water temperature is proposed to calculate water temperature dynamics in paddy fields and comprises three components: (1) the two-layer heat balance model, which is adopted to
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Assessment of the soil loss-prone zones using the USLE model in northeastern Iran Paddy Water Environ. (IF 1.262) Pub Date : 2020-09-12 Majid Ebrahimi, Hamid Nejadsoleymani, Ali Sadeghi, Mohammad Reza Mansouri Daneshvar
This research attempted to evaluate the soil loss-prone zones and affecting key factors in a suburb agricultural area in the western Mashhad city, northeastern Iran, using the universal soil loss equation model. All erosion factors and components were produced in GIS grid-based modeling. Therefore, the required data, such as topography, climate, and soil characteristics, were collected from global
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Assessing the habitat suitability of paddy fields for avian indicators based on hydropedological parameters of the wet agricultural soil along the Cauvery delta basin, India Paddy Water Environ. (IF 1.262) Pub Date : 2020-09-10 Manjula Menon
Paddy fields provide a broad range of habitats to wintering waterbirds as natural wetlands have declined worldwide. However, the intensification of farming practices has altered the microclimates of the wet agricultural soil, the composition of soil invertebrates, thus indirectly affecting the avifauna. This study evaluated the importance of paddy fields as wintering grounds for two avian indicators
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Temporal changes in soil hydraulic conductivity in saturated and unsaturated fields Paddy Water Environ. (IF 1.262) Pub Date : 2020-08-25 Junko Nishiwaki, Robert Horton
Soil hydraulic conductivity (\(K\)) is an important soil property that exhibits relatively large uncertainty. The temporal variability of \(K\) is often ignored when calculating water movement in soil. Various factors such as tillage, rain, temperature, wetting/drying, soil surface crusting, solution concentration, and biological activity can influence field \(K\). We investigated soil \(K\) in a central
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Treatment of domestic wastewater using the combination of porous concrete and phytoremediation for irrigation Paddy Water Environ. (IF 1.262) Pub Date : 2020-08-15 Mohsen Javaheri-Tehrani, Sayed-Farhad Mousavi, Jahangir Abedi-Koupai, Hojat Karami
Phytoremediation method, in combination with porous concrete and some additives, has been examined in order to reduce the contamination of unconventional water resources. This treatment system is economically cost-effective and easy to apply, compared to other treatment methods. The current study was focused on evaluating the effects of arrangement of vetiver grass and porous concrete specimens (four
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Case study for estimating the potential evaporation in tunnel farming in Central Japan Paddy Water Environ. (IF 1.262) Pub Date : 2020-08-11 Dai Yanyan, Ito Kengo, Zhang Pengfei, Senge Masateru
In this research, a method was proposed to estimate the potential evaporation in polytunnel fields. In order to calculate the potential evaporation by the Penman method, as part of an irrigation plan, the climatic conditions inside the tunnels needed to be accurately estimated by adjusting the climatic conditions outside the tunnels. Measurements taken in two polytunnels of watermelon plants from April
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Nutrient management impacts on net ecosystem carbon budget and energy flow nexus in intensively cultivated cropland ecosystems of north-western India Paddy Water Environ. (IF 1.262) Pub Date : 2020-07-29 Pritpal Singh, Dinesh Kumar Benbi
Nutrient management has led to unprecedented increase in crop production, but with significant carbon (C) trade-off that has close nexus with energy flow. We quantified the impacts of nutrient management on emission of greenhouse gases, net ecosystem C budget (NECB) and energy flow in three cropland ecosystems (rice–wheat, maize–wheat and cotton–wheat). Carbon dioxide (CO2) and nitrous oxide (N2O)
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Effect of water management on bat activity in rice paddies Paddy Water Environ. (IF 1.262) Pub Date : 2020-07-05 Roberto Toffoli, Marco Rughetti
Rice fields may represent an important habitat for biodiversity conservation. Unfortunately, rice farming intensification reduced the value of rice crops as a surrogate habitat for many species. Currently, major threats for wildlife in rice fields derive from cultivation techniques in dry soils. In this paper, we aim to describe the effect of water management techniques in rice paddies on the flight
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Clarification of the necessary meteorological conditions to control Ralstonia solanacearum via soil solarization Paddy Water Environ. (IF 1.262) Pub Date : 2020-06-23 Yanyan Dai, Pengfei Zhang, Kengo Ito, Keigo Noda, Masateru Senge
The present study was conducted to investigate the relationships between meteorological conditions and the disinfection effect of soil solarization in five greenhouses (located in Kaizu City, Gifu, Japan). The specific analysis focused on soil temperature, the population density of Ralstonia solanacearum before and after soil disinfection, the air temperature inside and outside the greenhouse, the
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Development of satellite-based surface methane flux model for major agro-ecosystems using energy balance diagnostics Paddy Water Environ. (IF 1.262) Pub Date : 2020-06-02 Sneha Thakur, Bimal K. Bhattacharya, Hitesh A. Solanki
Present study was carried out to develop multiple linear regression (MLR) model of surface CH4 flux emission from monthly atmospheric clearness index (8 km), day-night land surface temperature (LST) at 1 km and surface soil moisture (25 km) from Kalpana-1, MODIS TERRA and GCOM-W1 satellites, respectively. All these products were aggregated to GOSAT level-4A product resolution. 2° × 2° grids representing
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Green remediation of saline–sodic Pb-factored soil by growing salt-tolerant rice cultivar along with soil applied inorganic amendments Paddy Water Environ. (IF 1.262) Pub Date : 2020-05-13 Muhammad Mazhar Iqbal, Tayyaba Naz, Mazhar Iqbal Zafar, Muhammad Imtiaz, Omer Farooq, Atique ur Rehman, Shafaqat Ali, Muhammad Rizwan, Sabir Hussain, Wasim Javed, Ghulam Murtaza, Muhammad Afzal, Abid Mahmood, Shahzada Munawar Mehdi, Muhammad Aleem Sarwar, Gijs Du Laing
In Pb-factored soils, soil application of appropriate inorganic amendment along with cultivation of salt-tolerant crop species/genotypes for Pb immobilization can be a good choice. Hence, in saline-sodic and non-saline/sodic Pb-factored soils, Pb immobilization was observed as influenced by exogeneously applied inorganic amendments. Salt-tolerant rice cultivar Shaheen basmati was grown in present study
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Partitioning of eddy covariance-measured net ecosystem exchange of CO 2 in tropical lowland paddy Paddy Water Environ. (IF 1.262) Pub Date : 2020-05-06 Sumanta Chatterjee, Chinmaya Kumar Swain, Amaresh Kumar Nayak, Dibyendu Chatterjee, Pratap Bhattacharyya, Smruthi Sagarika Mahapatra, Manish Debnath, Rahul Tripathi, Prabhat Kumar Guru, Biswaranjan Dhal
Net ecosystem exchange of CO2 (NEE) measurement was carried out in tropical lowland paddy at ICAR-National Rice Research Institute, Cuttack, Odisha, India, in 2015 using eddy covariance technique with the objective to assess the variation of NEE of CO2 in lowland paddy and to find out the most suitable model for better partitioning of net ecosystem exchange of CO2 in tropical lowland paddy. Paddy is
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Adsorption kinetic and cadmium fractions in two calcareous soils affected by zinc and different moisture regimes Paddy Water Environ. (IF 1.262) Pub Date : 2020-05-04 Farzad Rassaei, Mehran Hoodaji, Seyed Ali Abtahi
This study has been conducted to ascertain the impact of zinc (Zn) on cadmium (Cd) fractions in two types of calcareous soils of the Fars Province in Iran at the waterlogged and field capacity conditions; also we investigated the adsorption of Cd in soils throughout different shaking times. We examined the effect of Zn on Cd fractions due to their similar characteristics. Treatments were three levels
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Winter wheat growth and water use under different micro-sprinkling irrigation regimes in the North China Plain Paddy Water Environ. (IF 1.262) Pub Date : 2020-04-27 Shanshan Bai; Shuqin Wan; Yaohu Kang
To develop more efficient irrigation technologies and a reasonable and convenient irrigation scheduling for winter wheat production in the North China Plain (NCP), a field experiment with five soil matric potential (SMP) treatments under irrigation with micro-sprinkling hoses was conducted in 2013–2014 and 2014–2015. The SMP thresholds were − 10, − 20, − 30, − 40 and − 50 kPa and monitored using tensiometers
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Evaluating impacts of climate change on hydrology and total nitrogen loads using coupled APEX-paddy and SWAT models Paddy Water Environ. (IF 1.262) Pub Date : 2020-04-24 Dong-Hyeon Kim; Taeil Jang; Syewoon Hwang
Climate change is currently one of the most critical issues in watershed management, and typical paddy systems should be addressed by watershed modeling approach in paddy-dominant landscapes. This study is designed to evaluate and enhance the watershed modeling approach currently used to characterize the impacts of climate change on hydrologic and water quality responses while considering a paddy environment
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Simulation of water allocation in Sefidroud irrigation and drainage network for sustainability of rice production Paddy Water Environ. (IF 1.262) Pub Date : 2020-04-22 Maryam Salar-Ashayeri, Mohammadreza Khaledian, Mohammad Kavoosi-Kalashami, Mojtaba Rezaei
With the growing population and people’s increasing livelihoods, the need for agricultural products is increasing day by day, which in turn implies an increase in the water requirement in the agriculture sector. However, in countries such as Iran, the main problem in the agriculture sector is mismanagement, not lack of water resources as popularly claimed. The purpose of this study is to investigate
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Effect of conservation tillage and rice-based cropping systems on soil aggregation characteristics and carbon dynamics in Eastern Indo-Gangetic Plain Paddy Water Environ. (IF 1.262) Pub Date : 2020-04-22 Surajit Mondal; Sushanta Kumar Naik; A. A. Haris; J. S. Mishra; Joydeep Mukherjee; K. K. Rao; B. P. Bhatt
Traditional rice–wheat cropping system, which follows wet puddling in rice and conventional tillage in wheat, is deteriorating soil health resulting yield stagnation in the Indo-Gangetic Plains of South Asia. Conservation agriculture which endorses minimum soil disturbance, residue retention and crop diversification not only improves soil health but also reduces the CO2 concentration in atmosphere
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Storing and removing nitrogen in drainage from paddy field by using aquatic crops wetland Paddy Water Environ. (IF 1.262) Pub Date : 2020-04-21 Qi Wei; Jintao Liu; Yihao Peng; Junzeng Xu; Linxian Liao; Shihong Yang
Aquatic crop (Zizania latifolia Stapf–Ipomoea aquatica Forsk) wetlands were constructed to remove nitrogen (N) in drainage from paddy rice fields, with three different storage water depths (namely 4H, 7H and 10H, where H is the routine paddy drainage water depth). Concentrations of ammonium nitrogen (NH4+-N), nitrate nitrogen (NO3−-N) and total nitrogen (TN) during the first two drainage events were
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Assessment of social sustainability components in agriculture sector of Iran using a systemic approach Paddy Water Environ. (IF 1.262) Pub Date : 2020-03-28 Hamed Ghadermarzi; Pouria Ataei; Hamid Karimi; Safe Allah Safaei
The present descriptive correlational study focused on assessing the social sustainability of intercropping-based family farming systems and agricultural cooperative systems with a systemic approach. The statistical population was composed of the villages in Shiraz County of Fars Province, Iran that were engaged in intercropping and production cooperative systems. In the first step, 186 farmers who
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Modeling fertilization impacts on nitrate leaching and groundwater contamination with HYDRUS-1D and MT3DMS Paddy Water Environ. (IF 1.262) Pub Date : 2020-03-18 Han Zhang; Ruxing Yang; Shanshan Guo; Qiling Li
Agriculture is recognized as the major source of groundwater nitrate (NO3−) contamination; yet quantifying its effects is still challenging in large, due to the difficulty to track the transformation and fates of agricultural nitrogen (N) in soils and aquifers. In this study, a HYDRUS-1D model was adopted to explore water content and NO3− distribution in the unsaturated zone above groundwater table
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Development of production management strategies for a long-duration rice variety: Rajendra Mahsuri—using crop growth model, DSSAT, for the state of Bihar, India Paddy Water Environ. (IF 1.262) Pub Date : 2020-03-17 Ranjeet K. Jha; Prasanta K. Kalita; Rajkumar Jat
Increasing crop production is an inevitable demand of a current growing population all over the world. Implementation of best field crop practices potentially enables farmers to achieve that desired increase in crop production. The CERES-Rice model in Decision Support System for Agrotechnology Transfer was used in this study with 10 years (2006–2015) of field experimental data collected from the CIMMYT
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Optimal conjunctive use of aqua-agriculture reservoir and irrigation canal for paddy fields (case study: Tajan irrigation network, Iran) Paddy Water Environ. (IF 1.262) Pub Date : 2020-03-17 Hamed Ebrahimian; Babak Dialameh; Seyed-Mohammad Hosseini-Moghari; Amirhossein Ebrahimian
Aqua-agriculture reservoirs have been used as one of the main resources for supplying water to paddy fields, particularly under water shortage conditions. In this study, a simulation–optimization model for conjunctive use of irrigation canals and aqua-agriculture reservoir was developed in order to maximize rainwater harvesting while minimizing water withdrawal from irrigation canal. The simulation
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Application of bio-desalinization for reclamation of salt-affected soil under composted cow manure and deficit irrigation with saline water Paddy Water Environ. (IF 1.262) Pub Date : 2020-02-22 Mahdi Kalanaki; Henk Ritzema; Roghayeh Bamshad; Edward Jones; Mojtaba Fazilatnia
Application of common leaching and flushing methods is often impractical due to freshwater scarcity, groundwater pollution and a lack of suitable drainage systems. To address these problems, a pot experiment testing the cultivation of Salicornia persica Akhani was conducted in three replicates. Three saline irrigation treatments (EC = 7.2 dS m−1) were used: full irrigation with saline water (SI), deficit
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Equilibrium, kinetics and artificial intelligence characteristic analysis for Zn (II) ion adsorption on rice husks digested with nitric acid Paddy Water Environ. (IF 1.262) Pub Date : 2020-02-21 Sami Ullah; Mohammed Ali Assiri; Mohamad Azmi Bustam; Abdullah G. Al-Sehemi; Firas A. Abdul Kareem; Ahmad Irfan
The use of low-cost adsorbents produced from rice husks that can selectively remove zinc (II) ion from wastewater effluent has been investigated. The disorder and fatal diseases can be triggered in living organisms by accumulating the heavy metals in the wastewater. Adsorption is an operative cleansing and separation method used in the industry to remove contaminants from effluents. In order to convert
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Impacts of rainfall variability on paddy production: A case from Bayawa minor irrigation tank in Sri Lanka Paddy Water Environ. (IF 1.262) Pub Date : 2020-02-15 Sumudu Chandrasiri; Lakshman Galagedara; Mohammed Mowjood
Rainfall (RF) variability has been suggested as the primary reason for low paddy production in the recent past under minor irrigation tanks (MITs). A study was conducted to verify the relationship between observed crop success/failures and the RF variability in the Bayawa MIT system in the Kurunegala district of Sri Lanka. Seasonal and annual RF variability and its effect on paddy crops were analyzed
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Salinity intrusion reduces grain yield in coastal paddy fields: case study in two estuaries in the Red River Delta, Vietnam Paddy Water Environ. (IF 1.262) Pub Date : 2020-02-10 Luyen T. H. Phan; Akihiko Kamoshita
We characterized 63 fields sampled based on farmers’ perception of production risks within each commune (referred as either safe or at-risk fields), from the 3 communes in the 2 contrasting estuaries with different farming transformation in Red River Delta, Vietnam (Giao Huong and Giao Thien communes in Ba Lat estuary, Nam Dien communes in Day estuary), for 6 cropping seasons from 2015 to 2017. Rice
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Conversion of abandoned paddy fields to productive land through mangrove restoration in Myanmar’s Ayeyarwady Delta Paddy Water Environ. (IF 1.262) Pub Date : 2020-01-27 Win Maung Aye; Shinya Takeda
In Myanmar’s Ayeyarwady Delta, mangrove forests were widely converted to paddy fields, then abandoned. However, the mangrove ecosystems often fail to recover. To identify the mangrove restoration options in these fields, we conducted the current study in Pyindaye Forest Reserve, Pyapon Township of the Delta by examining the structural and functional responses to restoration for two common mangrove
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Investigating impact of converging training walls of the ogee spillways on hydraulic performance Paddy Water Environ. (IF 1.262) Pub Date : 2020-01-25 Kiyoumars Roushangar; Ali Foroudi Khowr; Mojtaba saniei; Farhad Alizadeh
Due to their economical and structural aspects, ogee-crested spillways can be constructed and operated in a wide variety of situations. In this study, a three-dimensional physical model (1:50 scale) was planned and constructed to investigate the impact of converging training walls of the ogee spillways with a curve axis on flow characteristics such as the discharge coefficient, free surface profile
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Numerical modeling of flood flow after small earthen dam failure: a case study from the 2011 Tohoku earthquake Paddy Water Environ. (IF 1.262) Pub Date : 2020-01-22 Hajime Kojima; Yuji Kohgo; Kiyoshi Shimada; Daisuke Shoda; Hisato Suzuki; Hirotaka Saito
The 2011 Tohoku earthquake damaged many small earthen dams in Japan, causing flood damage and human casualties. Since then, the necessity for developing accurate inundation hazard maps for areas at risk has been highlighted. We constructed a numerical model using two-dimensional shallow-water equations with the finite element method to simulate such flood flows and tested this approach by simulating
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Analysis of the water balance and the nitrogen and phosphorus runoff pollution of a paddy field in situ in the Taihu Lake basin Paddy Water Environ. (IF 1.262) Pub Date : 2020-01-18 Yunqiang Xu; Baolin Su; Hongqi Wang; Jingyi He; Yaxue Yang
Nitrogen (N) and phosphorus (P) runoff loads of paddy fields in situ under conventional water and fertilizer management measures caused severe water pollution in the Taihu Lake basin. The “water balance method” was implemented to calculate the surface runoff and the N and P runoff loads of the paddy field for 2 years. The total inflow difference in the paddy field between the 2 years was 22.5% with
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Effects of subterranean termite nest architectures on earth embankment seepage and stability Paddy Water Environ. (IF 1.262) Pub Date : 2020-01-08 Ying Li; Zhi-Yong Dong; Dong-Zi Pan; Cun-Hong Pan
Subterranean termites (Odontotermes formosanus Shiraki) that build nests in the soil matrices of earth embankments may adversely affect the stability of these structures in paddy farming regions of southern China. An adult termite nest comprises a primary chamber, fungus gardens, passageways, and other shelter tubes. These porous architectures enable high hydraulic conductivity and rapid groundwater
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Community water management to intensify agricultural productivity in the polders of the coastal zone of Bangladesh Paddy Water Environ. (IF 1.262) Pub Date : 2019-12-20 Sudhir Yadav; Manoranjan K. Mondal; Aaron Shew; S. V. Krishna Jagadish; Zahirul Haque Khan; Asish Sutradhar; Humnath Bhandari; Elizabeth Humphreys; Jayanta Bhattacharya; Rokhsana Parvin; Mahabubur Rahman; Parvesh Chandna
Most of the lands of the southern coastal zone of Bangladesh are protected from tidal flooding and storm surges by embankments constructed during the 1960s and 1970s, creating polders. Sluice gates in the embankments connect the canals (former river distributaries) inside the polders to the surrounding rivers, providing the opportunity for water intake from, or drainage to the rivers by judicious management
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Development and testing of a surface roughness measurement device based on aerial ultrasonic reflections Paddy Water Environ. (IF 1.262) Pub Date : 2019-12-19 Kenji Okajima; Seiya Nagaoka; Mohammad Raihanul Islam; Ryouei Ito; Ken Watanabe
Repairs of concrete irrigation channels in Japan are guided to a large extent by the degree to which their walls have degraded over decades of use. Current methods of estimating Manning roughness coefficients from the roughness of the channel wall are based on linear profiles of arithmetic mean roughness. This study developed a method to estimate Manning roughness coefficients for a planar region directly
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Climate change and traditional upland paddy farming: a Philippine case study Paddy Water Environ. (IF 1.262) Pub Date : 2019-12-14 Mario A. Soriano; Srikantha Herath
Traditional agricultural practices, including paddy farming on terraced uplands, have garnered renewed interest in recent years in response to increasing concerns on environmental sustainability and the expected effects of climate change on global food security. However, little systematic research on the potential vulnerabilities of these traditional agroecosystems to future climatic change has been
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Effect of the concentration of NaCl and cylinder height on the sedimentation of flocculated suspension of Na-montmorillonite in the semi-dilute regime Paddy Water Environ. (IF 1.262) Pub Date : 2019-11-27 Muhamad Ezral Bin Ghazali; Yanuar Argo; Harumichi Kyotoh; Yasuhisa Adachi
In this study, we focused on the effect of the degree of floc growth on the moving velocity of the interface between sediment of flocculated montmorillonite and supernatant in the semi-dilute suspension, which is characterized by the start of an extremely slow movement of interface followed by an abrupt settling and ending in consolidation. Na-montmorillonite suspension coagulated under different ionic
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A preliminary investigation for Cu distribution in paddy soil and rice plants in contaminated paddy fields Paddy Water Environ. (IF 1.262) Pub Date : 2019-11-23 Seelawut Damrongsiri; Arubol Chotipong
The soil sample of a paddy field was found to be contaminated by copper (Cu). The application of wastewater as the nitrogen fertilizer was identified as the cause in this study. The concentration of Cu in soil and rice plants was therefore explored. The paddy soil characteristics indicated a strong anaerobic environment. The Cu concentration in topsoil was 123 ± 24 mg kg−1. The Community Bureau of
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Effects of shift in growing season due to climate change on rice yield and crop water requirements Paddy Water Environ. (IF 1.262) Pub Date : 2019-11-20 Pu Reun Yoon; Jin-Yong Choi
According to recent climate projections for South Korea, increases in temperature and precipitation will affect water use and crop production associated with paddy rice cultivation. Impacts are expected on crop growing season, crop varieties, and farming methods, all of which are highly vulnerable to disruption in weather conditions. Previous studies have estimated the effects on agricultural water
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Comparison of water use efficiency, profitability and consumer preferences of different rice varieties in Punjab, Pakistan Paddy Water Environ. (IF 1.262) Pub Date : 2019-11-06 Muhammad Asad ur Rehman Naseer; Muhammad Ashfaq; Amar Razzaq; Qamar Ali
Due to rapid population growth, water scarcity and food insecurity have become the major problems for Pakistan. Therefore, the efficient utilization of limited resources such as water is very important in agriculture. Paddy or rice—Pakistan’s second most important cereal and staple crop—is a water-intensive crop. The present study aims to estimate the water use efficiency, profitability, and consumer
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Evaluation of energy balance and greenhouse gas emissions in rice cultivation in Guilan province, northern Iran Paddy Water Environ. (IF 1.262) Pub Date : 2019-10-30 M. Salar Ashayeri; M. R. Khaledian; M. Kavoosi-Kalashami; M. Rezaei
The agricultural sector as a supplier of nutritional needs is becoming increasingly dependent on energy consumption. The present study was carried out to investigate the effect of paddy farm level of mechanization on the energy balance and greenhouse gas emissions as well as their effect on rice cultivation in Guilan province, Iran. The survey contains a strategy for assessing sustainable development
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Spatiotemporal trends in reference evapotranspiration over South Korea Paddy Water Environ. (IF 1.262) Pub Date : 2019-10-23 Ju Ha Hwang; Muhammad Azam; Maeng Seung Jin; Yong Ho Kang; Jae Eun Lee; Muhammad Latif; Rehan Ahmed; Muhammad Umar; Muhammad Zaffar Hashmi
The universal phenomena of global warming caused by climate change have direct linkage with different hydro-meteorological variables which in turn affect the evaporative demand of the atmosphere. Therefore, this study evaluated the seasonal and spatial changes in reference crop evapotranspiration (ETo) during last 4.7 decades and identified the forcing mechanism behind the seasonal changes in ETo using
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Dynamic change in rice leaf area index and spectral response under flooding stress Paddy Water Environ. (IF 1.262) Pub Date : 2019-10-10 Qian Sun; Xiaohe Gu; Lin Sun; Guijun Yang; Longfei Zhou; Wei Guo
Analysis of the canopy structure change and spectral response mechanism of rice under flooding stress is an important prerequisite for large-scale monitoring of rice flooding disasters. The leaf area index (LAI) was used as the characterization indicator. The response rule of the canopy spectrum to flooding stress intensity was analyzed. The sensitive spectral characteristic parameters were screened
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