摘要： 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。

关键词: 施氮量, 糯玉米, 硝态氮, 铵态氮

Abstract: 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??50X - 0??11X ².Nitrogen rates significantly affected the accumulation and distribution of nitrate N in the soilprofile but had little effect on ammonium N.The accumulation of nitrate N of the 270 kg/ ha was higher than the other Nrates which increased the rudiment of nitrate N, at the same time, the rainfall or irrigation would increase the risk of nitrate N leaching to the subsoil and had a potential threaten on the environment.

Key words: Nitrogen fetilizer rate, Waxy corn, Nitrate N, Ammonia N

中图分类号: 

• S143.1