Journal of Agricultural Resources and Environment. 2014, (04)

Effects of Stabilized Nitrogen Fertilizer on Grain Yield and Nitrogen Use Efficiency of Summer MaizeChinese Full Text

LI Min;YE Shu-ya;LIU Feng;GUO Xi-sheng;HUANG Yi-de;Institute of Soil and Fertilizer,Anhui Academy of Agricultural Sciences;College of Agronomy, Anhui Agricultural University;Laboratory of Nutrient Cycling,Resources and Environment of Anhui;College of Agronomy,Anhui Agricultural University;

Abstract: A summer maize field experiment was carried out in 2013 to investigate the effects of stabilized nitrogen fertilizer rates on yield,nitrogen accumulation, nitrogen efficiency of summer maize, and economic efficiency. Compared with no stabilized nitrogen fertilizer, the yield of stabilized nitrogen fertilizer treatments as 90, 150, 210 N kg·hm-2and 270 N kg·hm-2increased 36.7%, 62.1%, 76.6% and 81.9%respectively. Total N absorbed by above ground parts increased 39.0%, 60.3%, 79.0% and 113.4%, and economic benefits increased 36.1%,61.2%, 72.7% and 77.1% respectively. Compared with farmer conventional nitrogen fertilizer practices, the yield of stabilized nitrogen fertil-izer treatments as 210 N kg·hm-2and 270 N kg·hm-2increased 7.3% and 10.5% respectively. Total N absorbed by above ground parts increased 3.2% and 23.0%, and economic benefits increased 9.7% and 11.4% respectively. The results demonstrated that stabilized nitrogen fertilizer application significantly promoted growths yield and N accumulation. 210 N kg·hm-2and 270 N kg·hm-2increased total nitrogen absorption higher than farmer conventional nitrogen fertilizer practices. Nitrogen apparent recovery efficiency（NARE）and nitrogen agronomic efficiency（NAE）of application with stabilized nitrogen fertilizer were significant higher than those of farmer conventional nitrogen fertilizer practices. Nitrogen partial factor productivity（NPFP）of applied stabilized nitrogen fertilizer was higher than that of conventional nitrogen fertilizer practices. Nitrogen physiological efficiency（NPE）was higher than that of conventional nitrogen fertilizer practices with exception of270 N kg·hm-2. Based on summer corn yield and N use efficiency, the optimum stabilized nitrogen fertilizer application rate was 210 N kg·hm-2.

Keywords：

stabilized nitrogen fertilizer; summer maize; yield; nitrogen use efficiency;

DOI：
10.13254/j.jare.2014.0135
Series：
Subject：
Classification Code：
S513

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Effects of Stabilized Nitrogen Fertilizer on Grain Yield and Nitrogen Use Efficiency of Summer MaizeChinese Full Text

LI Min;YE Shu-ya;LIU Feng;GUO Xi-sheng;HUANG Yi-de;Institute of Soil and Fertilizer,Anhui Academy of Agricultural Sciences;College of Agronomy, Anhui Agricultural University;Laboratory of Nutrient Cycling,Resources and Environment of Anhui;College of Agronomy,Anhui Agricultural University;

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