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Impact of long-term agricultural management practices on soil organic carbon and soil fertility of paddy fields in Northeastern Thailand
Geoderma Regional ( IF 3.1 ) Pub Date : 2020-06-16 , DOI: 10.1016/j.geodrs.2020.e00307
Kaewjai Oechaiyaphum , Hayat Ullah , Rajendra P. Shrestha , Avishek Datta

Soil organic carbon (SOC) is an essential indicator of soil quality and soil fertility. Agricultural management practices can influence SOC and soil fertility. The objective of the present study was to evaluate the impact of agricultural management practices on SOC and soil fertility of paddy fields in the northeastern region of Thailand over a 10-year period. Initial data on SOC and soil fertility parameters in the top 20 cm under indigenous management (compost amendment) in Maha Sarakham Province were collected in 2007 by the Khon Kaen Rice Research Center. The data on SOC and soil fertility parameters were collected again in 2016 after 10 years from 130 farmers' fields located in close proximity to the sites from where the initial data were collected in 2007. The impacts of the conversion of indigenous agricultural management practice into government-promoted management practices on SOC and soil fertility were evaluated. The practices were continuous compost amendment (CA) during 10 years as the control, the shift from CA to biofertilizer (BF), to green manuring (GM), and to rice straw (RS) incorporation. Measurements made at the end of the 10-year period showed that the adoption of government-promoted agricultural management practices generally increased SOC and soil fertility. The incorporation of RS resulted in the largest change in total nitrogen (156% increase), SOC concentration (152% increase), and SOC density content (149% increase) over the 10-year period. The same management practice (RS) had the greatest SOC sequestration rate (1.43 Mg ha−1 yr−1). Results demonstrate the value of RS incorporation into agricultural soils over time for improving SOC and soil fertility. Soil incorporation of compost (CA) could be another option for its potential to improve soil fertility.



中文翻译:

长期农业管理实践对泰国东北稻田土壤有机碳和土壤肥力的影响

土壤有机碳(SOC)是土壤质量和土壤肥力的重要指标。农业管理实践会影响土壤有机碳和土壤肥力。本研究的目的是评估农业管理实践对泰国东北地区10年间稻田土壤有机碳和土壤肥力的影响。孔敬水稻研究中心于2007年收集了玛哈沙拉堪府土著管理(堆肥修正)前20 cm的土壤有机碳和土壤肥力参数的初始数据。在经过10年的研究之后,2016年再次收集了SOC和土壤肥力参数的数据,这些数据来自2007年收集原始数据的地点附近的130个农民田地。评估了将土著农业管理实践转变为政府推动的管理实践对SOC和土壤肥力的影响。做法是在10年内进行连续堆肥改良(CA)作为对照,从CA转向生物肥料(BF),向绿色肥料(GM)和向稻草(RS)的掺入。在十年期结束时进行的测量表明,采用政府推动的农业管理措施通常会提高土壤有机碳和土壤肥力。在10年期间,RS的掺入导致总氮(增加156%),SOC浓度(增加152%)和SOC密度含量(增加149%)的变化最大。相同的管理实践(RS)具有最大的SOC隔离率(1.43 Mg ha 从CA转移到生物肥料(BF),绿色肥料(GM)和稻草(RS)的合并。在十年期结束时进行的测量表明,采用政府推动的农业管理措施通常会提高土壤有机碳和土壤肥力。在10年期间,RS的掺入导致总氮(增加156%),SOC浓度(增加152%)和SOC密度含量(增加149%)的变化最大。相同的管理实践(RS)具有最大的SOC隔离率(1.43 Mg ha 从CA转移到生物肥料(BF),绿色肥料(GM)和稻草(RS)的合并。在十年期结束时进行的测量表明,采用政府推动的农业管理措施通常会提高土壤有机碳和土壤肥力。在10年期间,RS的掺入导致总氮(增加156%),SOC浓度(增加152%)和SOC密度含量(增加149%)的变化最大。相同的管理实践(RS)具有最大的SOC隔离率(1.43 Mg ha 在10年期间,RS的掺入导致总氮(增加156%),SOC浓度(增加152%)和SOC密度含量(增加149%)的变化最大。相同的管理实践(RS)具有最大的SOC隔离率(1.43 Mg ha 在10年期间,RS的掺入导致总氮(增加156%),SOC浓度(增加152%)和SOC密度含量(增加149%)的变化最大。相同的管理实践(RS)具有最大的SOC隔离率(1.43 Mg ha-1  yr -1)。结果表明,随着时间的推移,将RS掺入农业土壤中对于提高SOC和土壤肥力具有重要意义。土壤掺入堆肥(CA)可能是提高土壤肥力的另一种选择。

更新日期:2020-06-16
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