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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.
In recent years, reasonable fertilization research, the use of quadratic surface effect equation reflects the input of nitrogen and phosphorus fertilizer and yield of the production function relationship.According to the analysis of multi-point test results, the quadratic equation can objectively reflect the actual situation of each point, good fitting However, many influencing factors should be taken into account in the field.Taking into account the similar climatic conditions and single soil type, the following questions are discussed in the field test results of winter wheat: the relationship between the primary term and soil initial nutrient in the equation; the effect equation The relationship between primary term and quadratic coefficient; the effect of soil nutrient N and P ratio on the interaction of nitrogen and phosphate fertilizer and fertilizer efficiency; the estimation of basic yield of soil fertility and the price of fertilizer recommended by using the fertilizer effect equation.