麦套花生优化施肥研究

A study on optimal fertilizer application for intercropped peanut

采用三因素二次饱和Ｄ—最优设计，建立了麦套花生Ｎ、Ｐ、Ｋ施肥与花生产量间的数学模型。由模型可得：（１）Ｎ、Ｐ、Ｋ三种肥料对麦套花生产量作用显著，且互作间存在较大的交互效应，因此，Ｎ、Ｐ、Ｋ需配合使用。（２）公顷产量４５００～５２５０ｋｇ的优化施肥方案为：每公顷施Ｎ１０９．５～１４７ｋｇ，Ｐ２Ｏ５１３３．５～１８６ｋｇ，Ｋ２Ｏ２４３～３４８ｋｇ；最优组合为：每公顷施Ｎ１３９．６ｋｇ，Ｐ２Ｏ５１７４．３ｋｇ和Ｋ２Ｏ３２３．３ｋｇ，最高产量可达５２６０ｋｇ／ｈｍ２。

A study was carried out on the peanut (intercropped with wheat) yield response to the fertilizers of N,P and K using the Threefactor Quadratic Saturation Doptimal Design and a mathematical model was established between fertilizers and the peanut yield. The results showed: (1)The contribution of N,P and K to the peanut yield was significant and there were relatively significant interactions among them, so the fertilizers of N,P and K should be applied in proper formulation.(2) The optimized fertilizer rate for the yield of 4 5005 250kg/hm2 was N 109.5147kg/hm2, P2O5 133.5186kg/hm2, K2O 243348kg/hm2, and the most proper assemblage was N 139.6kg/hm2,P2O5 174.3kg/hm2 , K2O 323.3kg/hm2. The maximum yield of 5 260kg/hm2 could be obtained based on this experiment.