| 施氮时期对夏玉米碳氮运转及氮肥利用的影响 |
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| 引用本文： | 夏来坤,陶洪斌,朱金城,徐杰,王璞.施氮时期对夏玉米碳氮运转及氮肥利用的影响[J].华北农学报,2009,24(3). |
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| 作者姓名： | 夏来坤 陶洪斌 朱金城 徐杰 王璞 |
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| 作者单位： | 中国农业大学农学与生物技术学院,北京,100193 |
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| 基金项目： | 国家科技支撑计划项目 |
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| 摘 要： | 以提高夏玉米氮肥利用率、减少氮肥污染为着眼点,研究了不同施氮时期(三叶期施氮、大喇叭口期施氮、三叶期施氮结合大喇叭口期展追氮)对夏玉米植株碳氮运转及氮肥利用率的影响.结果表明,与不施氮相比,施氮降低了茎鞘、叶片等营养器官花前贮藏物质运转量和运转率以及总运转量和运转率,减弱了玉米各营养器官花前贮藏物质向籽粒的再运转能力.施氮降低了植株花前贮藏氮素总运转量和运转率,提高了籽粒全氮含量.三叶期施氮结合大喇叭口期追氮处理下夏玉米的氮肥利用率最高,较三叶期施氮和大喇叭口期施氮分别提高了21.8个百分点和22.8个百分点,较好的提高了夏玉米当季氮肥利用率,能够有效地降低因氮素损失而造成的农田污染.
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| 关 键 词： | 夏玉米 施氮时期 物质运转 氮肥利用率 |
Effects of Nitrogen Application Time on Carbon Assimilate and Nitrogen Translocation and Nitrogen Use Efficiency of Summer Maize |
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| XIA Lai-kun,TAO Hong-bin,ZHU Jin-cheng,XU Jie,WANG Pu.Effects of Nitrogen Application Time on Carbon Assimilate and Nitrogen Translocation and Nitrogen Use Efficiency of Summer Maize[J].Acta Agriculturae Boreali-Sinica,2009,24(3). |
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| Authors: | XIA Lai-kun TAO Hong-bin ZHU Jin-cheng XU Jie WANG Pu |
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| Institution: | College of Agronomy and Biotechnology;China Agricultural University;Beijing 100193;China |
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| Abstract: | Aimed to reduce pollution of nitrogen fertilizer(NF)and heighten nitrogen use efficiency(NUE)in summer maize,effects of nitrogen application time(applied nitrogen in 3-leaf stage,applied nitrogen in 12-leaf stage,applied nitrogen in 3-leaf stage and 12-leaf stage)on carbon assimilate and nitrogen translocation and NUE were studied in 2007.The main results as follows,nitrogen application reduced the amounts and remobilization rate of per-anthesis stored assimilates and total amount of pre-anthesis stored ass... |
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| Keywords: | Summer maize N application time Assimilate transportation NUE |
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