【摘要】 采用三因素二次回归通用旋转设计,对氮磷钾施用量与小葱产量的相关性进行了研究,并建立了三元二次回归方程:Y=44.68+1.01X1+1.18X2+0.81X3-0.78X21-0.75X22-0.71X23-0.72X2X3三因素皆与产量存在相关性,其中磷肥对产量的影响最大,氮肥次之,钾肥较小。经计算机模拟,最佳施肥量为N229.0kg/hm2、P2O5239.2kg/hm2、K2O112.5kg/hm2,小葱产量最高可达45452.35kg/hm2。更多还原

【Abstract】 By means of quadratic general rotational combination design,the relevance between of the application rate of N. P. K and output of shallot was studied and the regression equation was set up:Y=44.68+1.01X₁+1.18X₂+0.81X₃-（0.78）X²_<sup>-0.75X²₂-0.71X²₃-0.72X₂X₃.Analysis results indicated that:these three factors had relevance to output of shallot, phosphate fertilizer affected the output to the highest degree, nitrogenous fertilizer had an fewer effect and potassium fertilizer seldom influenced the shallot output.By simulation with computer,the best use amount of fertilizer was N 229.0 kg/hm²,P₂O₅ 239.2 kg/hm²,K₂O 112.5 kg/hm² respectively,the output of shallot could reach 45 452.35 kg/hm².更多还原