| 玉米杂交种氮效率基因型差异 |
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| 引用本文： | 刘建安,米国华,陈范骏,张福锁.玉米杂交种氮效率基因型差异[J].植物营养与肥料学报,2002,8(3):276-281. |
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| 作者姓名： | 刘建安 米国华 陈范骏 张福锁 |
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| 作者单位： | 1.中国农业科学院土壤肥料研究所 北京100081; |
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| 基金项目： | 国家自然科学基金(39770438);国家重点基础发展规划项目(G1999011707)资助. |
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| 摘 要： | 利用北京地区推广的 8个主要玉米杂交种 ,在不施N和施N条件下研究了产量、N累积量及N效率的基因型差异。结果表明 ,在不施N和施N条件下 ,不同品种之间产量的变异幅度分别为 62%、57% ;N累积总量的变异幅度则分别为 55%、48%。其中以农大 108的产量和N累积总量最高 ,中单 120和中单 2号最低。随施N量增加 ,吸收效率和N效率显著下降 ,利用效率则变化不大。在 2个施N水平下 ,N效率基因型差异主要决定于吸收效率
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| 关 键 词： | 产量 N累积量 N效率 玉米杂交种 |
| 文章编号： | 1008-505X(2002)03-0276-06 |
| 修稿时间： | 2001年7月20日 |
Genotype differences on nitrogen use efficiency among maize hybrids |
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| LIU Jian-an,MI Guo-hua,CHEN Fan-jun,ZHANG Fu-suo.Genotype differences on nitrogen use efficiency among maize hybrids[J].Plant Nutrition and Fertilizer Science,2002,8(3):276-281. |
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| Authors: | LIU Jian-an MI Guo-hua CHEN Fan-jun ZHANG Fu-suo |
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| Institution: | 1.Soil and Fertilizer Institute;CAAS;Beijing 100081;China; |
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| Abstract: | A field experiment with eight maize hybrids cultivated mainly in Beijing was conducted to investigate the genotypic differences in grain yield, shoot N accumulation and N use efficiency under two N level conditions. The results showed that the variation range of grain yield among maize hybrids were 62% and 57%, total shoot N accumulation were 55% and 48%, respectively. Nongda 108 had the highest grain yield and shoot N accumulation, and Zhongdan 120 and Zhongdan 2 were the lowest ones. With increased N application, N uptake efficiency and N use efficiency decreased significantly, whereas N utilization efficiency almost the same. Genotypic variation in N use efficiency depended mainly on uptake efficiency at both N levels. |
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