施氮量对糯玉米产量及土壤氮动态的影响

研究了不同氮肥用量对糯玉米产量、氮肥利用率、铵态氮和硝态氮累积及其土壤剖面分布的影响。结果表明:适量施氮可提高作物产量,过量施氮未表现出增产效果,氮肥利用率降低,糯玉米的氮肥效应方程:Y=13189+28.50X-0.11X2。施氮量可显著影响土壤中硝态氮的累积和分布,但对铵态氮的影响较小。当施氮(N)量达到270kg/hm2水平时,土壤硝态氮累积量远高于其他施氮水平,增加了土壤硝态氮的残留,同时,因降雨或灌溉的作用而向下层土壤移动,造成硝态氮的淋失,对环境造成潜在威胁。

Effect of Nitrogen Fertilizer on Waxy Corn Yield and Soil Nitrogen Dynamics

This paper studied the effect of different nitrogen rates on waxy corn yield,N use efficiency and soil nitrogen dynamics.The results show:the appropriate N application rate increased crop biomass and grain yield while over application of N fertilizer did not increase crop biomass or yield,The N fertilizer effect equation of waxy corn was Y=13 189+28.50X0.11X2.Nitrogen rates significantly affected the accumulation and distribution of nitrate N in the soil profile but had little effect on ammonium N.The accum...