基于HYDRUS-2D的宽垄沟灌冬小麦水氮运移模拟OA

In order to address the problem of water and nitrogen application of winter wheat with wide furrow irrigation,the study selected three lower limits of soil moisture control,60%field water holding capacity(W1),70%field water holding capacity(W2)and 80%field water holding capacity(W3).In additon,three levels of nitrogen application,120 kg/hm2(F1),220 kg/hm2(F2),and 320 kg/hm2(F3),were selected to carry out the study on the water and nitrogen transport of winter wheat of different water and nitrogen treatments.The water and nitrogen transport experiments were carried out in the field under different water and nitrogen treatments.Based on the measured data of the field experiments,a numerical model of soil water and nitrogen transport in wide-row furrow irrigation was constructed by HYDRUS-2D to analyse the feasibility of numerical simulation of soil water and nitrogen distribution and transport under different water and nitrogen treatments.The results showed that the measured values of soil moisture content,ammonium nitrogen,and nitrate nitrogen were in good agreement with the simulated values.The results of this study can provide a basis for the study of soil water and nitrogen transport mechanism of winter wheat in different water and nitrogen treatments in broad-row furrow irrigation.