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《Journal of Jilin Agricultural University》 2012-01
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Effect of Control Release Urea on Spring Maize Yield,N Use Efficiency and Soil Nitrogen

CAO Ning1,CHEN Zhi-yi2,YAN Fei1,YANG Zhen-ming1 1.College of Plant Science,Jilin University,Changchun 130062,China;2.Bijie Polytechnic Normal University,Bijie 551700,China  
The experiments were conducted to investigate the effects of single basal application of control release urea with kieselguhr as the carrier on rate of yield of maize,shoot dry weight and N uptake of maize in different growth stages,NH4+-N and NO3——N of soil.The results show that control release urea application could increase shoot dry weight and N use efficiency of maize,inhibit urease activity of soil and maintain soil NH4+-N and NO3——N during the late growth stage.The treatments of twice fertilization and control release urea could increase yield by 23.48% and 17.70%,improve N use efficiency by 17.33% and 17.58%,respectively.Therefore,the control release urea in this study can be used by single basal application to maize production system,and help to change twice fertilization(basal and dressing) to once fertilization(basal),and thus benefit to labor-saving and improve nitrogen utilization efficiency.
【Fund】: 吉林省科技发展计划项目(20060579)
【CateGory Index】: S513
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