氮磷钾锌对玉米茎基腐病及产量的影响

在小麦-玉米轮作制下,通过2 a的定位施肥后,研究了氮、磷、钾、锌对玉米茎基腐病及产量的影响。结果表明:氮是影响玉米茎基腐病的首要营养因子、钾次之,连续高量施氮处理发病最重、连续不施钾处理次之,施钾可显著减轻茎基腐病的发生;氮是影响玉米产量的首要营养因子、磷次之,在氮磷配施的基础上施用钾肥可以显著提高产量、减缓发病;连续高量施磷处理的土壤有效锌含量最低,连续高量施氮处理次之;在氮磷钾配施的基础上施用锌肥,可以显著提高产量,改善玉米后期穗位叶部性状,减轻病害发生。

Effects of Combined N and P and K and Zn Fertilizers on Corn Stalk Rot and Yield of Summer Maize

The experiment was carried out to study effects of N,P,K,Zn on corn stalk rot and yield in rotation system of winter wheat and summer maize by two years. The results showed that N fertilizers was first faction on influence of corn stalk rot, K second, disease index was most after the application of N continued heavy, non-application of K second, application of K had significantly effect on mitigating diease. N fertilizers was first faction on influence of yield,P second,N and P and K fertilizer application was significantly superior to N and P on corn stalk rot and yield. Soil available Zn was lowest after the application of P continued heavy, the application of N continued heavy was secondly. N and P and K and Zn fertilizer application was significantly superior to N and P and K on corn stalk rot and yield and ear leaf character.