| 夏玉米地杂草为害的产量损失模型 |
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| 引用本文： | 倪汉文,张丽,陈勇,李善林.夏玉米地杂草为害的产量损失模型[J].植物保护学报,2000,27(2):163-167. |
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| 作者姓名： | 倪汉文 张丽 陈勇 李善林 |
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| 作者单位： | 中国农业大学农学系 |
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| 基金项目： | 国家“九五”攻关项目(96-005-01-05-4) |
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| 摘 要： | 为了明确杂草在对杂草密度与夏玉米产量损失之间的函数关系的影响及反枝苋和马齿苋为害夏玉主的产理损失模型，在田间开展了此项研究。试验结果表明，反枝苋和马齿苋为害均不显著地影响夏玉米的籽粒得和单位面积穗数，造成夏玉米产量损失主要是通过降低每穗的籽粒数要草密度和夏玉米产量损失之间的函数关系因杂草种类不同而异，描述反枝苋密度和夏玉米产量损失之间的关系用双曲线优于Ｓ形曲线，而描述马齿苋密度和夏玉米产量损失之间
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| 关 键 词： | 反枝苋 马齿苋 杂草密度 夏玉米田杂草 产量损失 |
YIELD LOSS MODEL DUE TO THE INFESTATION OF WEEDS IN SUMMER MAIZE |
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| Ni Hanwen,Zhang Li,Chen Yong and Li Shanlin.YIELD LOSS MODEL DUE TO THE INFESTATION OF WEEDS IN SUMMER MAIZE[J].Acta Phytophylacica Sinica,2000,27(2):163-167. |
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| Authors: | Ni Hanwen Zhang Li Chen Yong and Li Shanlin |
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| Institution: | Department of Agronomy, China Agricultural University, Beijing 100094,Department of Agronomy, China Agricultural University, Beijing 100094,Department of Agronomy, China Agricultural University, Beijing 100094 and Department of Agronomy, China Agricultural University, Beijing 100094 |
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| Abstract: | A field experiment was conducted to determine the relationships between the yield loss of summer maize and the infestations of Amaranthus retroflexus and PoHulaca oleracea. The results showed that the weed damage did not significantly affect grain weight and ear number of summer maize. The crop yield was mainly determined by kernel numbers per ear under the condition of the weed infestation. The relationships between crop yield loss and weed infestation depended on weed species. The relationship between summer maize yield loss and A. retroflexus density was hyperbolic, while that between the crop yield loss and P. oleracea density was S-shape. |
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| Keywords: | Amaranthus retrqflexus Portulacd oleracea summer maize weed density-yield loss model |
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