Response of winter wheat yield, nitrogen use efficiency and soil nitrogen balance to rainfall types and nitrogen application rate in dryland

Abstract

: To study the effects of nitrogen application rate on grain yield, nitrogen utilization, and soil nitrogen balance of dryland winter wheat fields under different rainfall types, we explored the optimal nitrogen input levels for stable yield and high efficiency of winter wheat in the Weibei highland of North China, which could provide a theoretical basis for efficient fertilization. Five nitrogen treatments including 0, 60, 120, 180, and 240 kg hm –2 (designated as N0, N60, N120, N180, and N240, respectively) were arranged in Heyang County, Shaanxi Province from 2017 to 2020. The three-year in situ experiment were as follows: (1) Different rainfall types had significant impact on yield and economic profits of winter wheat. Compared with the normal and dry rate for both high yield and good environmental benefits, which could be benefit for reference in the production of this region.