Effects of Nitrogen Supply on Dry Matter Accumulation, Water-Nitrogen Use Efficiency and Grain Yield of Soybean (Glycine max L.) under Different Mulching Methods

In dryland agriculture, mulching methods and nitrogen application have been extensively adopted to improve water use efficiency increase crop yield. However, there has a scarcity of research on the combined effects types growth yield soybean (Glycine max L.). present study, four levels (N0: 0 kg N ha−1, N1: 60 N2: 120 N3: 180 ha−1) (NM: no mulching, SM: straw FM: film SFM: mulching) were set so as evaluate dry matter accumulation, grain yield, water-nitrogen efficiency, economic benefits in Northwest China from 2021 2022. The results show that formation, improved under different (SM, FM, SFM) applications (N1-N3), effect is best when rate N2 method FM. As such, conclusion could be drawn suitable (120 with was beneficial for utilization rainwater resources production China.