氮肥用量和追肥方式对玉米中玉15产量和氮肥利用效率的影响  

Effects of Different Nitrogen Fertilizer Application Rate and Different Topdressing Way on Yield and Efficiency for Maize Zhongyu 15

作　　者：牛斌[1] 刘社平[1] 王激清[1] 

机构地区：[1]河北北方学院农林科技学院,河北张家口075000

出　　处：《湖北农业科学》2009年第8期1844-1847,共4页Hubei Agricultural Sciences

基　　金：农业部结构调整项目"优质饲用玉米品种选育与利用"(2003-04-05A)

摘　　要：利用玉米中玉15为研究材料,研究了氮肥用量和追肥方式对玉米产量和肥料利用效率的影响。结果表明,各施氮处理与N0(不施氮肥)地上部生物量存在显著差异,而不同施氮处理间并无显著差异;氮素积累量在不同生育期的分布和不同追肥方式对玉米产量的影响试验表明,大喇叭口期是玉米最高需肥时期,在这个时期追肥可以使玉米产量获得显著提高。通过中玉15在不同施氮量下产量变化曲线可以求得玉米最高产量施氮量为155.2kg·hm-2,同时随着施氮量的增加,中玉15的氮肥偏生产力、氮肥农学效率和氮肥利用率均呈降低的趋势,因此优化氮肥施用量才能获得最高的氮肥利用效率。Maize Zhongyu 15 was used as experiment material, effects of different N fertilizer application rate and different topdressing way on yield and efficiency for maize Zhongyu 15 were studied, and the results were as follows： ground biomass of maize Zbengyu 15 had significant difference in N treatments and without N （CK）, but there were no difference in all N treatments. Research on cumulative amount of N in different growth stages and topdressing way also showed that the trumpet stage was the best fertilizer application stage. By curve of yield and N application rate for maize Zhongyu 15 we could know that when N application rate was 155.2 kg·hm^-2, yield of maize in the local region was highest. As the increase of N application rate, partial factor productivity of applied N （PFPN）, agronomic efficiency of applied N （AEN） and apparent recovery efficiency of applied N （REN） for maize Zhongyu 15 showed decreasing trend, therefore, optimizing the amount of N fertilizer was necessary for improving N use efficiency.

关 键 词：氮肥 玉米 中玉15 产量 利用效率 

分 类 号：S513.062[农业科学—作物学]