新麦草种子产量的水肥耦合模型分析

Analysis on a model for water and fertilizer coupling effects on Psathyrostaehys juncea seed yield

采用二因素五水平正交组合设计方案,建立回归模型并进行效应解析后表明,肥对新麦草种子产量的效应大于水;水对新麦草种子产量作用为负效应;但是水肥耦合对新麦草种子产量的效应为协同效应.按照新麦草种子生产水肥因子的等效点方程可调整水肥因子.新麦草种子最高产量的施肥量为179.93 kg/hm2 (其中N:105.84 kg/hm2;P2O5:74.09 kg/hm2)～195.89 kg/hm2 (其中N:115.23 kg/hm2;P2O5:80.66 kg/hm2), 灌溉量为60.52～131.81 mm.

This paper presents an analysis on the model that was established based on a bin-factor orthogonal contract block field experiment design of P. juncea seed yield. The results showed that the effect of fertilizer on yield is higher than that of irrigation, with irrigation shown to have a negative-effect. However, the coupling effecl of irrigation and fertilizer was shown to have a synergistic effect on the yield. The assigned value of the factors according to the equilibrium equation, and the optimum range for the factors is given： the range for ferlilizer is 179.93 kg/hm^2 （N： 105.84; P2O5 ：74.09）- 195.89 kg/hm^2 （N： 115.23 ;P2O5 ：80. 66） ,the range for irrigation is 60.52-131.81 mm.