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Effect of straw mulching on water consumption components and crop coefficients in a maize field
Archives of Agronomy and Soil Science ( IF 2.4 ) Pub Date : 2022-02-20 , DOI: 10.1080/03650340.2022.2036334
Shanshan Qin 1, 2 , Yanqun Zhang 1, 2 , Jiandong Wang 3 , Yan Mo 1, 2 , Shihong Gong 1, 2 , Shuji Wang 4
Affiliation  

ABSTRACT

Clarifying the components and regulatory mechanisms of evapotranspiration is essential for irrigation scheduling. In this study, straw mulching and non-mulching treatments were set up in a maize field with drip irrigation, where the water use and related factors were determined in 2014 and 2015. Straw mulching slightly reduced evapotranspiration by 2.6% on average for the two years. However, transpiration of straw mulching increased by 10.0% and 9.0% and soil evaporation decreased by 36.0% and 31.1%, compared to the non-mulching treatment for 2014 and 2015, respectively. Straw mulching decreased the average crop coefficients of the entire growth period (from 1.03 to 1.01) while increasing them in the mid-growth period (from 1.20 to 1.22). The net radiation above the canopy for straw mulching was 92.3%–96.3% of that for non-mulching treatment, which could explain the lower evapotranspiration of the mulching treatment. The daytime canopy conductance of straw mulching was 30% higher than that of non-mulching treatment, which could potentially result in higher biomass. This study provided essential parameters for water management of drip irrigation maize fields with straw mulching in similar areas.



中文翻译:

秸秆覆盖对玉米田耗水成分和作物系数的影响

摘要

阐明蒸散的组成部分和调节机制对于灌溉调度至关重要。在这项研究中,在滴灌的玉米田中设置了秸秆覆盖和不覆盖处理,确定了 2014 年和 2015 年的用水量和相关因素。秸秆覆盖在两年内平均减少了 2.6% 的蒸散量。 . 然而,与 2014 年和 2015 年不覆盖处理相比,秸秆覆盖处理的蒸腾量分别增加了 10.0% 和 9.0%,土壤蒸发量减少了 36.0% 和 31.1%。秸秆覆盖降低了整个生育期的平均作物系数(从 1.03 到 1.01),而在生育中期增加了(从 1.20 到 1.22)。覆盖秸秆的冠层上方净辐射是不覆盖处理的 92.3%~96.3%,这可以解释覆盖处理的较低蒸散量。秸秆覆盖处理的白天冠层电导率比不覆盖处理高 30%,这可能会导致更高的生物量。该研究为类似地区秸秆覆盖的滴灌玉米田的水分管理提供了基本参数。

更新日期:2022-02-21
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