河西平川灌区绿肥压青后氮肥最佳减施比例

[目的]明确绿肥压青后小麦生产中的氮肥最佳减施比例。[方法]在河西绿洲生态条件下,设8个施肥处理,研究绿肥压青后小麦生产中的氮肥减施对作物产量的影响。[结果]不同处理间小麦产量存在显著差异,以处理＂绿肥＋70%化肥＂产量最高,而纯施化肥处理的小麦产量较低。在农艺指标方面,不同处理小麦株高、穗长、生物产量、收获指数、千粒重及产量之间均存在显著差异,以处理＂绿肥＋70%化肥＂及＂绿肥＋60%化肥＂的生物产量、千粒重较其他处理处于较高水平。[结论]绿肥压青后减施氮肥对小麦产量的影响基本是呈增产的趋势。

Study on the Best Ratio of Less Nitrogen Fertilizer after the Dressing of Green Manure in Hexi Corridor Irrigated Area

[Objective]The research aimed to confirm the best ratio of less nitrogen fertilizer after the dressing of green manure in Hexi Corridor irrigated area.[Method]Under the ecological conditions of Hexi Corridor oasis,8 fertilizer treatments were set to study the effects of less nitrogen fertilizer addition on the yield of crops after the dressing of green manure. [Result]The results showed that there were significantly differences among wheat yields of different treatments. And the yield of green manure fertilizer +70% fertilizer was highest,that of the treatment of pure fertilizer was lowest. In agronomic traits,plant height,ear length,biological yield,harvest index,thousand-grain weight and yield of different treatment were significantly differed. And the biological yield and thousand-grain weight of treatments such as green manure fertilizer +70% fertilizer and green manure fertilizer +60% fertilizer were higher than other treatments. [Conclusion]The effects of less nitrogen fertilizer addition on the yield of crops after the dressing of green manure were in the trend of promotion.