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采用田间试验,研究了混料设计中的单形重心设计在西瓜控释尿素与普通尿素配肥上的应用,测定了西瓜的产量及其构成,配置了各因子的产量回归方程,对肥料效应及经济效益进行了分析。结果表明,D90-D60两者配合比单施普通尿素增产8.24 t hm-2,增产率11.9%,U-D60-D90三者配合比单施U增产19.2 t hm-2,增产率27.7%,产量差异达极显著水平。经济效益分析表明,U-D60-D90产投比最高为5.58∶1,施肥利润为13033.50元hm-2。
The field experiment was used to study the application of monomodal center of gravity design in watermelon controlled release urea and ordinary urea fertilizer. The yield and composition of watermelon were determined and the regression equation of yield was established. The effects of fertilizer effect And economic benefits were analyzed. The results showed that the yield of D90-D60 increased by 8.24 t hm-2 and the yield increased by 11.9% compared with that of urea alone. The U-D60-D90 increased the yield by 19.2 t hm-2 and the yield increased by 27.7% The difference in production reached a very significant level. Economic analysis shows that U-D60-D90 production and investment ratio up to 5.58: 1, fertilizer profit of 13033.50 yuan hm-2.