| 施氮量对玉米产量和氮素利用效率及土壤硝态氮累积的影响 |
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| 引用本文： | 孙占祥,邹晓锦,张鑫,安景文.施氮量对玉米产量和氮素利用效率及土壤硝态氮累积的影响[J].玉米科学,2011,19(5):119-123. |
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| 作者姓名： | 孙占祥 邹晓锦 张鑫 安景文 |
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| 作者单位： | 辽宁省农业科学院环境资源与农村能源研究所,沈阳,110161 |
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| 基金项目： | 国家水体污染控制与治理科技重大专项（2008ZX07425-004）、“十一五”国家科技支撑计划重点项目（2008BAD95B01） |
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| 摘 要： | 采用田间试验研究不同施氮量对两个玉米品种子粒产量、土壤硝态氮累积量及氮素利用率的影响。结果表明,玉米产量随施氮量增加显著提高,当施氮量高于200kg/hm2时玉米产量不再增加,高氮处理地上部分秸秆生物量出现下降趋势。0～100cm土层硝态氮累积量随氮素输入量的增加显著增加。不同玉米品种对氮素的吸收利用影响硝态氮在土壤中的累积,植株氮积累量存在差异。密植型玉米先玉335总吸氮量高于平展型玉米辽单28,土壤硝态氮的累积量也显著低于后者。不同氮肥水平的氮肥利用率为28.38%～35.33%,高氮处理氮肥利用率最低。本试验条件下,中氮处理水平基本能够满足作物生长的需求。综合产量、氮肥利用效率和土壤硝态氮累积情况,确定合理施氮量应控制在200kg/hm2左右。
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| 关 键 词： | 玉米 施氮量 产量 土壤硝态氮 氮素利用率 |
| 收稿时间： | 2011/1/14 0:00:00 |
Effects of Maize Yield and N Application on N Utilization and Content of Soil Nitrate |
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| SUN Zhan-xiang,ZOU Xiao-jin,ZHANG Xin,AN Jing-wen.Effects of Maize Yield and N Application on N Utilization and Content of Soil Nitrate[J].Journal of Maize Sciences,2011,19(5):119-123. |
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| Authors: | SUN Zhan-xiang ZOU Xiao-jin ZHANG Xin AN Jing-wen |
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| Institution: | SUN Zhan-xiang,ZOU Xiao-jin,ZHANG Xin,AN Jing-wen(Rural Energy Environmental and Resources Research Institute,Liaoning Academy of Agricultural Sciences,Shenyang 110161,China) |
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| Abstract: | Field experiment was carried out to investigate N application on yield,soil nitrate accumulation,plant N uptake and utilization of two kinds of maize.The results showed that maize yield increased significantly with the increment of nitrate application rate,but the biomass of maize decreased and the yield of grain of maize didn't increase when the nitrogen application rate was higher than 200 kg/ha.Nitrogen application significantly increased nitrate content in all layers of soil profile and hyper-accumulati... |
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| Keywords: | Maize N application Yield Soil nitrate Nitrogen utilization efficiency |
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