| 水稻纹枯病的危害及经济阈值的探讨 |
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| 引用本文： | 李熙英,吕龙石,范丽清,权成武,全顺子.水稻纹枯病的危害及经济阈值的探讨[J].延边大学农学学报,1998(3). |
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| 作者姓名： | 李熙英 吕龙石 范丽清 权成武 全顺子 |
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| 作者单位： | 延边大学农学院 |
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| 摘 要： | 在田间人工接病菌的条件下探讨了水稻纹枯病的病情指数与产量损失率之间的关系及经济阈值，结果表明：产量损失率与不同调查日期的纹枯病病情指数之间呈指数函数关系．根据病丛率、病情指数与产量损失率之间的关系得到了以孕穗期和抽穗期病丛率为指标的经济阈值的动态模型，即：ＸＥＴ１＝１０．０４９５ｌｎ（１０９．３７３３Ｃ／ＹＰＦ）－３．７８８３；ＸＥＴ２＝１８．１９３２ｌｎ（１０９．３７３３Ｃ／ＹＰＦ）＋２．２６０９．
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| 关 键 词： | 纹枯病 病情指数 产量损失率 经济阈值 |
Studies on Harm of Rice Sheath Blight and Economic Threshold Value |
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| Li Xiying et al..Studies on Harm of Rice Sheath Blight and Economic Threshold Value[J].Journal of Agricultural Science Yanbian University,1998(3). |
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| Authors: | Li Xiying |
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| Abstract: | In order to study the relation between state index of rice sheath blight and rate of yield waste,and economic threshold value this experiment was conducted using the way of inoculating germ in paddle. The results showed,there was relation of exponential function between rate of yield waste and state index of rice sheath blight investigated in differente of date.Based on the relation of among rates of disease bundle.state index of rice sheath blight and rate of yield waste,with induction period and ear sprouting period as index,the economic threshold value dynamic model was established as:X ET 1 =10.0495ln(109.3733C/YPF)-3.7883;X ET 2 =18.1932ln (109.3733 C/YPF) 2.2609. |
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| Keywords: | Sheath blight State index Rate of yield waste Economic threshold value |
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