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采用氮、磷化肥两因素二次饱和D-最优设计，通过微机模拟计算，建立了春播芝麻产量与氮、磷施用量的回归模式，从36套参试方案中筛选出了亩产≥90kg的6套施肥方案。对参试因素与其产量效应进行了较系统的分析，并获得了最高经济施肥量，即硝酸铵11．04kg／亩和过磷酸钙22．85kg／亩，最高经济产量为86．375kg／亩，扣除肥料成本，可获每亩759．65元的收入。
Using nitrogen and phosphorus fertilizer two-factor secondary saturation D-optimal design, the regression model of sesame yield and nitrogen and phosphorus application rate was set up through computer simulation calculation. From 36 sets of test programs, 6 sets of fertilization programs. The test factors and their yield effects were systematically analyzed and the highest economic fertilizer was obtained, namely 11.04kg / mu ammonium nitrate and 22.85kg / mu superphosphate, the highest economic output was 86.375kg / mu, After deducting the cost of fertilizers, there will be a revenue of 759.65 yuan per mu.