| 不同基因型棉花地上部干物质积累对氮素的响应 |
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| 引用本文： | 刘绍东,张思平,张立祯.不同基因型棉花地上部干物质积累对氮素的响应[J].棉花学报,2010,22(1):77-82. |
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| 作者姓名： | 刘绍东 张思平 张立祯 |
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| 作者单位： | 1. 中国农业科学院棉花研究所/农业部棉花遗传改良重点实验室,河南,安阳,455000
2. 中国农业大学资源与环境学院,北京,100193 |
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| 基金项目： | 农业部公益性行业(农业)科研专项棉花(3-5) |
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| 摘 要： | 选取有代表性的3个棉花品种(美国抗虫棉33B、常规棉中棉所12和抗虫杂交棉中棉所46),在大田试验条件下测定不同施氮处理下(0、90、180、270、360kg.hm-2)的叶面积指数(LAI)、地上部干物质量和植株氮浓度的动态变化。运用指数线性生长模型对棉花地上部干物质积累过程进行模拟,并用幂函数模拟棉花氮稀释效应。结果表明:(1)棉花地上部干物质增长过程可以用指数线性模型模拟,模型参数能较好地反映基因型和氮肥处理对地上部干物质积累的影响。(2)棉花地上部氮浓度随干物质的增长而降低,模型能较好地反映不同基因型棉花氮素吸收能力的差异。(3)通过对棉花地上部干物质增长和氮稀释效应的模拟分析,认为田间最佳施氮水平为180kg.hm-2,过量施氮对3个棉花品种的干物质积累和地上部植株氮素吸收增加无明显影响。
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| 关 键 词： | 棉花 地上部干物质积累 氮肥 指数线性生长模型 氮稀释 |
Above-ground Dry Matter Accumulation of Cotton Genetics at Different Nitrogen Applications |
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| LIU Shao-dong,ZHANG Si-ping,ZHANG Li-zhen.Above-ground Dry Matter Accumulation of Cotton Genetics at Different Nitrogen Applications[J].Cotton Science,2010,22(1):77-82. |
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| Authors: | LIU Shao-dong ZHANG Si-ping ZHANG Li-zhen |
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| Institution: | 1. Key Laboratory for Genetic Improvement of Cotton / Ministry of Agriculture/a>;Cotton Research Institute/a>;CAAS/a>;Anyang/a>;Henan 455000/a>;China/a>;2. College of Agricultural Resources and Environmental Sciences/a>;China Agricultural University/a>;Beijing 100193/a>;China |
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| Abstract: | Field experiments were conducted to analyze the dynamics of LAI,accumulation of above-ground dry matter and above-ground nitrogen content for three cotton varieties (Bt variety 33B,conventional variety CCRI 12 and Bt hybrid CCRI 46) under five nitrogen application levels (0,90,180,270 and 360 kg.hm-2 ) in a randomized completed block design in Anyang. The expolinear growth equation was used to simulate the dynamic of cotton above-ground dry matter; and a power function was used to describe nitrogen dilution... |
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| Keywords: | cotton above-ground dry matter accumulation nitrogen expolinear growth equation nitrogen dilution function |
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