| 气候因素与苜蓿蚜种群数量变化规律初探 |
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| 引用本文： | 祁德富. 气候因素与苜蓿蚜种群数量变化规律初探[J]. 青海大学学报, 1999, 17(3): 30-32 |
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| 作者姓名： | 祁德富 |
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| 作者单位： | 青海大学农牧学院农学系 西宁 |
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| 摘 要： | 西宁地区苜蓿蚜种数量随气候变化的增长曲线呈“Ｓ型”其数学模型为：Ｙ＝９８４９／１＋ｅ＾８．９３２５＋０．６９４９ｔ，蚜量最快增长期为６月中旬至７月初；蚕豆生育期内月平均干燥度指数Ｋ〉２．００以上，气候为干旱和很干旱等级时，蚜虫种群数量增长与同期≥５℃的积湿呈指数递增关系。
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| 关 键 词： | 苜蓿蚜 种群变化规律 气候因素 蚕豆 害虫 |
Discussion on Relations between Climatic Factors and Dynamics of Population Growth of Black Bean Aphid (Aphis craccivora Koch) |
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| QiDefu. Discussion on Relations between Climatic Factors and Dynamics of Population Growth of Black Bean Aphid (Aphis craccivora Koch)[J]. Journal of Qinghai University(Natural Science), 1999, 17(3): 30-32 |
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| Authors: | QiDefu |
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| Abstract: | The dynamics of population growth of black bean aphid is S - shape curve in Xining. Its mathematical model:Y = 9849/1 e8.9325 0.69491(Y:population growth function;e:base of natural logarithm ; t: time). The population growth is the fastest during the middle ten days of June to the first ten days of July. If the weather is of drought or very drought, month mean dry index (K)>2.0, the aphid population presents a exponential growth as the quantity of heat accumulates(T>5C) at the same time, that is, Y = 0.9377e0.006l(T:value of temperature accumulation,T>5C) |
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| Keywords: | Climatic factors Black bean aphid Dynamics of population growth |
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