宁南干旱山区春小麦氮、磷施肥模式研究

Study on Fertitizer Model of Nitrogen and Phosphrous for Spring Wheat in Arid Hilly Area of South NingXia

该文应用二次饱和Ｄ最优设计，研究了试区３种不同立地农田生态系统春小麦Ｎ、Ｐ施肥效应方程，建立起不同适宜性的施肥数学模型，分析研究了Ｎ、Ｐ肥的主效应和交互效应，计算出不同农田的最佳施肥量。以低位梯田为例，计算出不同产量下Ｎ、Ｐ肥的用量及最适配比。

Based on the f1eld test of saturated D-optimal designs with a Square,This paper deals with the response equa-tion of N and P fertilizer,on Spring Whest in three different yild ecosystem in Shanghuang experimental station.The mathmatic model of fertilization with different adaptability has been established, The main effect and mutualeffects of N and P fertilizer have been analized and the optimum of fertilizer required has been caculated according tothe model.fertilizer amount applied and the optimum ratio of N and P of crops grown in low terrace have been cacu-lated as an example.