淡黑钙土化肥定量和增产效益的研究

THE EFFECT OF A QUANTIFY CHEMICAL FERTILIZER ON CORN YIELD IN LIGHT CHERNOZEM

摘要:

本项试验采用二因子最优回归设计,以y=E₀+B₁+B₂X₂+B₃XX₁+B₄X_l²+B₅X₂²为数学模型计算出施用氮磷化肥效应函数。根据投入产出边际分析原理,求出玉米在淡黑钙土上化肥最佳用量,氮为9.6公斤/亩,磷（P₂O₅）为7.2公斤/亩,配合比例1:0.745。通过增产效益分析得出,在这个施肥量下,每公斤氮磷纯养分增产玉米15.8公斤,可获利润39.97元/亩。

Abstract:

In this experiment we adopt an optimum return desgin with two factors. The using effective function of nitrogen and phosphorous fertilizer can be calculated by a mathmatical model y=B₀+B₁X₁+B₂X₂+B₃X₁X₂+B₄X₁²+ B₅X₂². According to the theory of edge analysis of plunging and efficacy. We can oftain the most optimum amount of fertilizer using in light chernozem to corn 9.6 Kg/acre for nitrogen and 7.2 Kg/acre for phosphrous (P₂O₅). Mixing ratio is 1:0.745. From yield increasing analysis. It showed that in this fertilizer using amount. One kilogram nitrogen (N) and phosphorous (P₂O₅) can increase corn 15.8Kg and obtain profit RMB 39.97 yuan/acre.