双季水稻精确施氮参数的确定与验证

摘要

According to the experiment results obtained based on the equation of Standford the parameters of precision nitrogen application in double season rice in Nanchang area,Jiangxi Province were obtained.In no nitrogen fertilizer conditions, the amounts of N requirement for production 100 kg grain in early and late rice were 1.5 kg and 1.37 kg, respectively, the fundamental yields were 5 039.49 kg/hm2 and 5 347.49 kg/hm2 respectively, the fertilizer - N uptakies efficiency were 40％ and 45％, respectively.The parameters of nitrogen application and the field experimental results can be used to guide precision nitrogen application in double season rice in Nanchang area, Jiangxi Province.%根据多年试验结果,得出基于Standford方程的江西南昌地区双季水稻精确施氮参数.在不施氮条件下,双季早、晚稻生产100 kg稻谷的需氮量分别为1.5 kg和1.37 kg,基础地力产量分别为5 039.49 kg/hm2和5 347.49 kg/hm2,氮肥当季利用率分别为40%和45%.所确定的参数与大田验证试验结果基本一致,可用于指导江西南昌地区双季水稻精确施氮.