旱地土壤的合理施肥——Ⅸ.不同用量的铵、硝态氮对玉米产量的影响  

Rational Application of Fertilizers on Drylands The Influence of Different Application Rates of Ammonium and Nitrate Nitrogen on maize yields

作　　者：李生秀[1] 王和平[1] 

机构地区：[1]西北农业大学,陕西杨陵712100

出　　处：《干旱地区农业研究》1993年第S1期45-49,共5页Agricultural Research in the Arid Areas

基　　金：陕西省农牧厅资助项目

摘　　要：NH^+_4—N和NO^-_2—N对玉米均有明显增产效果,但整体来看,NH^+_4—N的效果优于NO^-_3—N。NH^+_4和NO^-_3—N对玉米的效果因用量而不同:用量低时,NO^-_3—N效果好,籽粒产量比NH^+_4—N高出13.6％,差异达到显著水平;用量高时,NH^+_4—N效果反而为优,籽粒产量差异为24.6％,达到极显著水平。随着氮肥用量增加,肥料增产效果下降,利用率降低。但NO^-_3—N在施6kg时,产量最高,利用率也较高;NH^+_4—N在亩施8kg氮时,产量最高,利用率与亩施6kgNO^-_3—N不相上下。Both ammonium and nitrate nitrogen had significant influence on maize yield increase, buton the whole, the ammonium N was better than nitrate nitrogen. Also, the effect of the twoforms of nitrogen on maize yields depended on their applied rates. At low rate, NO_3^- -N wasbetter, maize yield being increased by 13.6% at significant level as compared with NH_4^+ -N.However, at high rate, NH_4^+ - N was superior to NO_3^- - N in yield increase, the yield being24.6% higher than that with NO_3^- -N. With the rate increase, the efficiency of both NO_3^- -Nand NH_4^+ -N recovery was decreased. At 6 kg N per mu,NO_3^- - N produced the highest yieldand high N recovery. In contrast, at 8 kg N per mu, the yield was highest with NH_4^+ - Napplication, the efficiency of recovery being almost equivalent to 6 kg NO_3^- -N.

关 键 词：玉米 氮肥利用率 NH₄⁺-N NO₃^--N 

分 类 号：S423[农业科学—植物保护]