氮、磷、钾肥及微肥不同施肥量对向日葵产量的影响

摘要

A study of the effects of fertilizer N, P, K and microelement Zn, B on the sunflower Baikuiza No.9 on chernozem was conducted. The results indicated that the sufficient quantity of the special sunflower fertilizer (N, P2O5 and K2O content 45%,ratio of N∶P2O5∶K2O was 1∶2∶1) was 300~400 kg/hm2. The best effectiveness was obtained when Zinc sulfate heptahydrate (ZnSO4·7H2O) and sodium tetraborate (Na2B4O7·10H2O) were 10 kg/hm2 and 5 kg/hm2 respectively.%通过对白葵杂9号在黑钙土上氮、磷、钾肥以及锌硼肥的应用效果研究，结果表明：白葵杂9号向日葵专用复合肥（纯 N、P2O5、K2O 含量45%，纯 N︰P2O5︰K2O 为1︰2︰1）适宜的施用量为300～400 kg/hm2；锌肥的适宜施用量为10 kg/hm2，硼肥的适宜施用量应控制在5 kg/hm2时效果最好。