【摘要】 采用3因素2次回归通用旋转设计,对N、P、K施用量与洋葱产量的相关性进行了研究,并分别建立了3元2次回归方程。结果表明:N、P、K皆有利于洋葱的形成,P对洋葱产量的影响较大,在土壤缺P地区应重视P肥的施用;3因素在影响洋葱产量上存在交互作用;经计算机模拟,N、P、K最佳组合方案为:12.5kg/667m2、20.0kg/667m2、3.0kg/667m2,洋葱产量最高可达7440.2kg/667m2。更多还原

【Abstract】 By means of quadratic general rotational combination design, a three-factor(N,P,K) experiment of culture was conducted in union. The regression equation of the relationship amount N, P, K and the effects on yield of union was established. The results indicated that: the effect of three factors on the yield of union increased by degree in the series of P,N,K. The interaction amount N, P, K was analyzed. By simulation with computer, the optimum combination of N,P,K for the highest yield of union were 187.5 kg·hm-2 N?300.0 kg·hm-2 P?45.6 kg·hm-2 K respectively.更多还原