一、分析依据作物施肥效应是指作物对所施用肥料在产量上的反应。通过对试验数据的统计,即可拟合出反映作物产量和施肥水平关系间的施肥效应曲线(或曲面)。人们根据肥料效应曲线(或曲面)方程可以对肥料的经济效益进行各种分析,并求出最高产量施肥量、最佳经济施肥量、不 First, the analysis based on crop fertilization effect refers to the crop fertilizer on the yield in response. Through the statistics of the experimental data, the fertilization effect curve (or surface) reflecting the relationship between crop yield and fertilization level can be fitted. Based on the fertilizer effect curve (or surface) equation, people can make various analyzes on the economic benefits of fertilizer and find out the highest yield fertilization amount, the best economic fertilizer amount, and not