不同施肥制度对土壤肥力及玉米产量的影响

Effects of Different Fertilizer Treatments on Soil Fertility and Maize Yield

在潮土上进行了5年的定位试验,研究了不同施肥制度对土壤肥力和玉米产量的影响。结果表明:长期均衡施肥(NPK、M、NPKM),可以显著提高土壤全氮、全磷、速效氮、有效磷等肥力指标以及玉米产量,尤以M处理增幅最大,与本底值相比,土壤全氮、全磷、速效氮和有效磷含量分别增加了15.00%,24.81%,18.97%和21.43%;而不均衡施肥(N、NK、NP)导致相应的营养元素的含量降低。分析表明,在潮土上施氮肥和磷肥对提高玉米产量具有重要的作用。

A study on soil fertility and maize yield with different fertilization systems were carried out in fluvo-aquic soil in Tianjin.The results indicted that maize yield of NPK,M and NPKM treatments were greater than other treatments.The contents of total N and total P,alkali-hydrolyzed nitrogen and available P increased in NPK,M and NPKM treatments.Especially in the M treatment,the contents of total N and total P,alkali-hydrolyzed nitrogen and available P increasedby 15.00%,24.81%,18.97% and 21.43%,respectively.On the contrary,total N and P were exhausted in the treatments without N or P fertilizer.Similar trends were observed in the case of alkali-hydrolyzed nitrogen and available P in the treatments without N and P fertilizers.The N and P fertilizers had significant yield-increasing effects on maize in fluvo-aquic soil.