郫县小麦高产施肥技术研究

本文运用四因素五水平二次正交旋转回归试验方法，在影响郫县小麦产量的施肥技术诸因素中，选择氮、磷、钾施用量和追氮时期作为生产上的决策变量，以小麦产量为目标函数，建立了二次回归数学模型。通过对模型的主效应、交互效应的分析表明：施磷量和追氮时期是影响小麦产量的主要控制因子。根据试验结果筛选出小麦（川育１２号）在油沙田上每公顷产量高于６０００ｋｇ的综合施肥技术措施，同时，剖析了郫县小麦经验施肥措施，得出高肥早追、低肥迟追的小麦施肥技术。

STUDY ON FERTILIZER MPLICATION TECHNIQUES FOR HIGH YIELD OF WHEAT IN PIXIAN

Regression method of orthogonal conic substitution with four factors has been employed in this study. Application amount of Nitrogen. Phosphorus. Potassium and supplement period of Nitrogen, which are considered to be the four chief fertilizring factors affecting the yield of wheat cultivated in Pixian region of Chengdu plain, were studied. Under the experimental conditions, the wheat-yield simulation model was built up. Based on the model, the optimal combination of fertilizer practice for high yield of wheat was obtained and the different fertilizering techniques at present production practices were also discussed.