Assessing the influence of soil spatial variability on water leakage and nitrate leaching and yield
WEN Jiangli1,2, LI Jiusheng1*, ZHAO weixia1, LI Yanfeng1
1.State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China; 2.Beijing Research Center of Intelligent Equipment for Agriculture, Beijing 100097, China
Abstract:We studied the influences of spatial variability of soil properties and precipitation patterns on crop yield and nitrate leaching in the growth stage of maize using the CERES-Maize crop model. The results indicated that the precipitation can damp the effect of soil spatial variability on water lea-kage, nitrate leaching and maize yield. The maize yield, water leakage, and nitrate leaching during a wet year were obviously higher than those during a normal year and a dry year. The precipitation can damp the effect of soil spatial variability on nitrate leaching and on maize yield. The maize yield decreased and the spatial variability of maize yield increased with the increasing of soil spatial variability. It is of importance to consider soil spatial variability in developing water and nitrogen management when the variation coefficient of silt and clay content exceeds 0.2.
温江丽,, 李久生*, 赵伟霞, 栗岩峰. 土壤空间变异对水氮淋失和产量影响的模拟研究[J]. 排灌机械工程学报, 2018, 36(10): 1035-1040.
WEN Jiangli,, LI Jiusheng*, ZHAO weixia, LI Yanfeng. Assessing the influence of soil spatial variability on water leakage and nitrate leaching and yield. Journal of Drainage and Irrigation Machinery Engin, 2018, 36(10): 1035-1040.
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