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随着化肥用量的增加,品种的增多,因土施肥以达到最大的经济效益,是当前农业生产上迫切要求解决的问题.对于几种肥料、不同用量的配合试验,方差分析虽然能估计出试验误差,定出显著性差异的数量界限,在判别不同处理的产量结果之间差异是否显著方面很有作用,但是难以从经济角度去寻找合理的施肥量.采用多元回归分析的方法,不但能够估计出试验误差,而且还能求出作物产量与施肥量之间相应的函数关系,建立回归方程.根据得到的施肥效应函数方程,结合肥料及谷物价格,就能计算出满足一定条件的经济合理的施肥量.由于回归分析法的计算比较复杂,因此长期以来很少在肥料试验中应用.随着电子计算机应用的日益广泛,
With the increase of the amount of chemical fertilizer, the increase of variety and fertilization by soil to achieve the maximum economic benefit are the urgent problems to be solved in current agricultural production.For several kinds of fertilizers, with different dosage, the variance analysis can estimate the test Error, the number of significant differences in the determination of the limit, in determining whether the difference between the yield of different treatments is significant, but it is difficult to find a reasonable amount of fertilizer from the economic point of view. Using multiple regression analysis method, not only can be estimated The experimental error can be obtained, and the corresponding functional relationship between crop yield and fertilizer application can be obtained and the regression equation established.According to the fertilization effect function equation obtained, combined with the price of fertilizer and grain, we can calculate the economic and reasonable Fertilizer amount.As the calculation of regression analysis is more complicated, so a long time rarely used in fertilizer testing.With the increasingly widespread application of electronic computers,