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目的：探讨中华按蚊自然状态下的动态变化。方法：于１９９４年－１９９５年在郑州地区，对中华按蚊自然种群第５、６、７、８世代的生命表进行了研究。结果：共建立了８个生命表，从中可以看出：进入雨季后，死亡关键因素Ｋ值中，Ｋ５最高，Ｋ９次之。用Ｖａｌｅｙ的图解分析法和Ｐｏｄｏｌｅｒ的回归分析法进行了关键因素分析。根据ｌ９９５ａ的生命表资料绘制了当年５－８代的存活曲线。种群趋势指数Ｉ值均大于１，第５代的Ｉ值最高。结论：中华按蚊自然种群死亡的第１关键因素是大暴雨引起ｌ－２龄幼虫的死亡，第２关键因素是捕食引起的３—４龄幼虫的死亡。最高死亡率出现在ｌ－２龄幼虫阶段。存活曲线均属于ＳｌｏｂｏｄｋｉｎⅣ型。在郑州地区６、７、８月份内，中华按蚊自然种群数量均是增加的，第５代增加的最高（Ｉ＝３４．４５４８）。
Objective: To explore the dynamic changes of Anopheles sinensis in natural condition. Methods: The life tables of the 5th, 6th, 7th and 8th generations of the natural population of Anopheles sinensis from 1994 to 1995 were studied in Zhengzhou area. Results: A total of 8 life tables were established. It can be seen that among the K values of the key factors of death after entering the rainy season, K5 is the highest and K9 is the second. A key factor analysis was conducted using Valey’s graphical analysis and Podoler’s regression analysis. According to l995a life table data drawn 5-8 generations of survival curve. The population trend index I values were greater than 1, the fifth generation of the highest I value. CONCLUSIONS: The first key factor in the death of the natural population of Anopheles sinensis was the death of l-2 larvae caused by heavy rainstorms. The second key factor was the death of 3-4 instar larvae of predators. The highest mortality occurred in the l-2 instar larval stage. Survival curves belong to Slobodkin type IV. In June, July and August in Zhengzhou, the population of Anopheles sinensis increased with the increase of the fifth generation (I = 34.4548).