Effects of green manure incorporation combined with nitrogen fertilizer reduction on wheat yield and nitrogen utilization in oasis irrigated area

• Published in: Zuo wu xue bao Vol. 49; no. 11; p. 3131
• Main Authors: Chai, Jian, Yu, Ai-Zhong, Li, Yue, Wang, Yu-Long, Wang, Feng, Wang, Peng-Fei, Lyu, Han-Qiang, Yang, Xue-Hui, Shang, Yong-Pan
• Format: Journal Article
• Language: Chinese
• Published: Beijing Chinese Academy of Agricultural Sciences (CAAS) 01.01.2023
• Subjects: Accumulation; Crop yield; Efficiency; Fertilizer use reduction; Fertilizers; Grain; Harvesting; Incorporation; Manures; Nitrogen; Productivity; Reduction; Translocation; Utilization; Wheat
• ISSN: 0496-3490

Aiming at the problems of yield increase constrained and low fertilizer efficiency, the effect of green manure incorporation and nitrogen application on wheat yield and nitrogen utilization were investigated and the field experiment was conducted in Hexi oasis irrigated area in 2021 and 2022. Compared with the control of traditional nitrogen application mode（G0N1）, setting the following treatments include green manure incorporation at 7500 kg hm-2（G1）, 15,000 kg hm-2（G2）, 22,500 kg hm-2（G3）,and 30,000 kg hm-2（G4）, and nitrogen fertilizer reduction at 153 kg hm-2（N2）, and 126 kg hm-2（N3）, their combined application with each other as G1N2, G2N2, G3N2, G4N2, G1N3, G2N3, G3N3, G4N3, and the combined effects on nitrogen absorption and accumulation and grain yield of wheat were analyzed. The results showed that green manure incorporation at 30,000 kg hm-2combined with chemical nitrogen fertilizer reduction by 15%（G4N2） can effectively improve crop yield and promote nitrogen use efficiency at the same time. Compare