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生态学杂志 ›› 2009, Vol. 28 ›› Issue (10): 2138-2141.

• 研究简报 • 上一篇    下一篇

不同初始密度棉蚜种群动态过程

高桂珍1,2;马吉宏1,2;吕昭智1**;赵 煜3   

  1. 1中国科学院新疆生态与地理研究所,乌鲁木齐 830011; 2中国科学院研究生院,北京 100049; 3新疆农业大学科技学院,乌鲁木齐 830052)
  • 出版日期:2009-11-10 发布日期:2009-11-10

Population process of Aphis gossypii with different initial density.

GAO Gui-zhen1,2|MA Ji-hong1,2;LZhao-zhi1;ZHAO Yu3   

  1. 1Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China|2Graduate University of Chinese Academy of Sciences, Beijing 100049, China|3College of Science and Technology, Xinjiang Agricultural University, Urumqi 830052, China
  • Online:2009-11-10 Published:2009-11-10

摘要: 为探索棉蚜初始密度对其种群过程的影响,在棉田控制1和20头·叶-12个初始密度,通过尼龙网纱袋构建在封闭(套袋)与开放(不套袋)条件下,监测棉蚜在不同初始密度和不同环境条件下种群动态。结果表明:初始密度越大,棉蚜种群峰值越高,封闭条件和开放条件棉蚜种群峰值没有显著性差异;初始密度越大种群高峰期越早,开放条件比封闭条件种群高峰期提前;封闭条件下,初始密度越大,种群崩溃越快。种群发展初期,初始密度越小,种群增长率越大,开放条件比封闭条件棉蚜种群增长快;种群高峰期和崩溃期,不同初始密度棉蚜种群增长率没有显著差异。初始密度影响有翅蚜形成,初始密度越大,有翅蚜比例越高;但封闭条件和开放条件有翅蚜比例没有显著性差异。

Abstract: To approach the effects of Aphis gossypii’s initial density on the population process of this aphid, two initial densities (1 and 20 aphids per leaf) were installed in a cotton field under open and nylon net-closed conditions, and the population dynamics of A. gossypii was monitored. At the initial density 20 aphids per leaf, the peak value of the population was larger, with no significant difference between open and nylon netclosed conditions, and the peak period occurred earlier, and advanced under open condition. Under nylon net-closed condition, the population with the initial density 20 aphids per leaf collapsed more rapidly. At the early stage of the population process, the population growth rate was higher at the initial density 1 aphid per leaf, and the population increased more rapidly under open condition. In the peak period and collapse period of the population, no significant differences were observed in the population growth rate at the two initial densities. The proportion of alate aphids was larger at the initial density 20 aphids per leaf, but no significant difference was found between open and nylon netclosed conditions.

Key words: Leymus chinensis, Clonal growth, Clonal architecture, Ecotype, Divergent type