拔节期氮肥用量对小麦生长及产量的影响

[目的]研究花培5号拔节期适宜的氮肥用量。[方法]采用随机区组排列,研究拔节期氮肥用量对小麦生长及产量的影响。[结果]拔节期氮肥用量为37.5~225.0 kg/hm~2时,产量随氮肥用量的增加而增加。当氮肥用量超过225.0 kg/hm~2时产量下降。[结论]安徽省沿淮花培5号在拔节期的最佳氮肥用量在225.0 kg/hm~2左右为宜。

Effect of Nitrogen Fertilizer Application on Growth and Yield of Wheat at Jointing Stage

[Objective]To study the appropriate amount of nitrogen fertilizer at jointing stage.[Method]The effect of nitrogen fertilizer applica-tion on wheat growth and yield were studied by using randomized block arrangement.[Result]When the amount of nitrogenous fertilizer was 37.5~225.0 kg/hm2,the yield increased with the increase of nitrogen fertilizer.Yields decreased when the amount of nitrogen fertilizer exceeded 225.0 kg/hm2.[Conclusion]The optimum amount of nitrogen fertilizer used at jointing stage is about 225.0 kg/hm2in Anhui Province.