摘要
采用"311-B"二次回归最优设计,研究了N、P、K肥配施对健宝牧草产量和效益的影响。结果表明,N肥对健宝牧草的产量和效益影响最大;在较高施N水平下,P、K间交互效应有利于健宝牧草的增产增收;最优施肥方案为N303.89kg/hm2、P2O5240kg/hm2、K2O240kg/hm2,其产量为104378.58kg/hm2,效益为8154.38元/hm2。
The effects of N, P and K fertilizers on the yield and benefit of Jumbo (Sorghum bicolor×Sorghum sudanense ) were studied in Tongliao by'311-B'optimized regression design.The results showed,the level of application N was a primary factor that affected the yield and the benefit of Jumbo.In condition of higher N level,the K-P interaction led to increasing the yield and benefit.The optimum combination of the three fertilizers was N 303.89kg/hm^2+P_2O_5 240kg/hm^2+K_2O 240kg/hm^2,and its yield and benefit was 104378.58kg/hm^2,8154.38 $/hm^2 respectively.
出处
《中国草地》
CSCD
2004年第2期10-14,共5页
Grassland of China
关键词
健宝
氮
磷
钾
肥料
牧草
产量
效益
Jumbo
Nitrogen,phosphorus and potassium
Yield
Benefit
