【摘要】 试验研究氮磷钾的不同配比对油菜生长发育和产量的影响。结果表明,施用氮肥可增加油菜株高24.2%,施用氮肥对提高油菜的一次分枝和二次分枝都有显著的作用,但过量施用氮肥会影响油菜的分枝数量。施用磷肥对单株有效角果数具有显著影响,施用磷肥处理比不施磷肥处理的单株角果数增加40.1%。施用钾肥对油菜株高、一次分枝和二次分枝具有显著影响,施用钾肥对油菜的分枝的影响要显著大于氮磷的效应。综合三元二次方程和一元二次方程拟合结果,结合当地农业生产实际,安徽省芜湖县油菜生产体系的氮、磷、钾肥推荐用量分别为N 225 kg/hm2、P2O575 kg/hm2和K2O 60 kg/hm2。更多还原

【Abstract】 The one-point experiment was conducted to study the effects of the prescription of N,P,K on yield of rapeseed in Wuhu county of Anhui province from 2005 to 2006.Results showed that N application increased the rape height by 24.2% against control,and also had significant effects on improving the first and second branch amount of rape.And with P treatment had 40.1% more pod amount per plant than without P treatment.Besides,K fertilizer significantly increased the plant height,first branch and second branch of rape against control,and K fertilizer had more significant effects on branch than N and P fertilizer.According as the experimental results and the local agricultural production status,the optimum fertilization rates were 225 kg N,75 kg P2O5 and 60 kg K2O per hectare in Wuhu county of Anhui province.更多还原