| 不同种植密度下施氮对夏玉米物质生产及穗粒形成的影响 |
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| 引用本文： | 申丽霞,王璞,孙西欢.不同种植密度下施氮对夏玉米物质生产及穗粒形成的影响[J].山西农业科学,2008,36(1):41-44. |
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| 作者姓名： | 申丽霞 王璞 孙西欢 |
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| 作者单位： | 1. 太原理工大学水利科学与工程学院,山西,太原,030024
2. 中国农业大学农学与生物技术学院,北京,100094 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 采用大田试验和室内生化分析等方法研究了不同种植密度下施氮对夏玉米物质生产和穗粒形成的影响。结果表明,在中(67 500株/hm2)、高(82 500株/hm2)密度下,氮肥对玉米单株物质生产能力的调控作用更为明显,并主要是通过影响穗粒数来实现的。适宜的施氮量可以使玉米叶片维持较高的光合性能,从而为穗粒形成提供充足的光合碳量。供氮不足或过量都导致生育后期叶片衰老加快。
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| 关 键 词： | 玉米 氮肥 密度 物质生产 穗粒 |
| 文章编号： | 1002-2481（2008）01-0041-04 |
| 收稿时间： | 2007-07-16 |
| 修稿时间： | 2007年7月16日 |
Effect of Nitrogen Application to Dry Matter Productivity and Kernel Setting in Summer Maize (Zea mays L) in Different Plant Populations |
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| SHEN Li-xia,WANG Pu,SUN Xi-huan.Effect of Nitrogen Application to Dry Matter Productivity and Kernel Setting in Summer Maize (Zea mays L) in Different Plant Populations[J].Journal of Shanxi Agricultural Sciences,2008,36(1):41-44. |
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| Authors: | SHEN Li-xia WANG Pu SUN Xi-huan |
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| Abstract: | Effect of nitrogen(N) application to dry matter productivity and kernel setting in summer maize(Zea mays L) hybrid Zhengdan 958 in different plant populations was studied through field experiment and biochemical analysis.The results showed that the effect of N to grain yield of individual plants,mainly acted through the regulation of kernel number,was more evident in 67 500 plants/hm2 and 82 500 plants/hm2.Appropriate N could keep leaves a higher photosynthesis ability and provide more assimilate to grain,while both inadequate and excessive N accelerated the decreasing process of leaves at later growth stage. |
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| Keywords: | Maize Nitrogen Plant population Dry matter productivity Kernel |
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