应用施肥效应方程指导施肥的有关因素分析

近年来在合理施肥研究中,采用二次曲面效应方程反映氮、磷肥投入与产量的生产函数关系.据多点试验结果分析,二次方程均能客观地反映各点实际情况,拟合度好.但在田间运用应考虑到许多影响因素.本文拟就气候条件相近,土壤类型单一的条件下,对冬小麦田间试验结果探讨如下问题:方程中一次项与土壤初始养分测定值的关系;效应方程中一次项与二次项系数的关系;土壤养分氮、磷比例对氮、磷肥交互作用及肥效的影响;地力基础产量的估算及采用施肥效应方程推荐肥料用量的价格问题.

FACTORIAL ANALYSIS FOR FERTILIZER APPLICATION GUIDED BY APPLICATION RESPONSE EQUATION

In recent years, the response equation of quadratic surface is adopted to reflect the production function relationship between N, P fertilizer input and yeild in the research of proper application of fertilizers. The analysis from the results of muliple-spot experiments indicated that all the quadratic equations could objectively reflect the actual situation of each spot and the degree of imitative coincidence is good. But many facors should be considered when the method is used in field.This paper intends to approach the following problems for the field experiment of winter wheat under the condition of similar weather and single soil type, the relationship between the linear entry in equations with the livel of the initial nutrient value in soil; the relationship between coefficients of linear and quadric entries in the response equation; the effect of soil nutrient N, P ratio on their interaction and application response; and yield estimate on the basis of soil productivity and cost of fertilizer application recommanded by the response equation.