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生态学杂志 ›› 2005, Vol. ›› Issue (10): 1115-1119.

• 研究报告 •    下一篇

玉米田截形叶螨种群动态的研究

庞保平1, 刘家骧2, 刘茂荣3, 高书晶1   

  1. 1. 内蒙古农业大学农学院, 呼和浩特, 010019;
    2. 内蒙古自治区植物保护站, 呼和浩特, 010010;
    3. 鄂尔多斯市植物保护站, 东胜, 017000
  • 收稿日期:2004-10-16 修回日期:2004-12-20 出版日期:2005-10-10
  • 基金资助:
    内蒙古自治区自然科学基金资助项目(990303-2).

Population dynamics of Tetranychus truncatus in corn fields

PANG Baoping1, LIU Jiaxiang2, LIU Maorong3, GAO Shujing1   

  1. 1. College of Agriculture, Inner Mongolia Agricultural University, Huhhot 010019, China;
    2. Inner Mongolia Plant Protection Station, Huhhot 010010, China;
    3. Erduos Plant Protection Station, Dongsheng 017000, China
  • Received:2004-10-16 Revised:2004-12-20 Online:2005-10-10

摘要: 1999~2001年于内蒙古巴彦卓尔盟杭锦后旗研究了玉米田截形叶螨田间种群动态。结果表明,截形叶螨在玉米田的空间格局为聚集格局,随着叶螨种群密度的上升,其聚集强度下降应用最优分割法将玉米截形叶螨田间种群动态划分为5个阶段:①7月上旬前为种群初建期,叶螨在玉米田刚开始发生,种群数量很低,只分布在极少数植株上;②7月中旬为种群缓慢增长期,种群数量低,增长缓慢,聚集强度高;③从7月下旬至8月中旬为种群快速增长期,种群数量高,增长迅速,叶螨分布至全田,聚集强度下降;④8月下旬为种群高峰期,种群数量最高,聚集强度较低;⑤9月以后为玉米截形叶螨种群的衰落期,由于玉米受害严重及玉米进入生长后期,中下部叶片大部分均已枯死,上部叶片也已老化营养水平下降,加之气温下降,叶螨种群数量迅速下降。

关键词: 贝加尔针茅, 分蘖株, 构件结构, 无性系生长

Abstract: The population dynamics of Tetranychus truncatus in corn fields were investigated in Hangjinghouqi,Bayanzhuoer League,Inner Mongolia from 1999 to 2001.The results showed that the spatial patterns of the mites were aggregated,and the aggregation intensity decreased with increasing population density.With optimal sorting method,the natural population dynamics of T.truncatus were divided into five stages,(i.e,)(1)the population began to colonize with low quantity on a few plants in June and early July,(2)increased slowly with low density and high aggregation intensity in mid-July,(3)rose quickly and distributed in whole corn fields with high density and declining aggregation intensity from the end of July to mid-August,(4)reached the highest with the lowest aggregation intensity in the end of August,and(5) declined quickly in September.

Key words: Stipa baicalansis, Tiller, Module structure, Clonal growth

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