迁安条桑昆虫群落结构的初步研究

Preliminary Investigation on the Community Structure of Insects in Mulberry Shoot in Qianan

[目的]研究迁安条桑昆虫的群落结构。[方法]通过系统调查研究,对条桑昆虫群落的优势集中性指数、Shannon-Wiener多样性指数、均匀度指数、物种丰富度指数进行分析。[结果]该条桑昆虫群落中共有昆虫72种,其中包括亚群落昆虫37种,占总数的51.39%,非害虫亚群落(包括天敌和中性昆虫)35种,占总数的48.61%。条桑昆虫群落结构稳定性较好,均匀度较大且优势种不明显。边缘效应对条桑昆虫群落结构具有一定的影响。处于样地边缘的条桑昆虫群落的生物多样性指数较低,而处于样地中心区域的条桑昆虫群落的生物多样性指数较高。[结论]该研究为条桑害虫的综合治理提供了一定的理论基础。

[ Objective] The aim was to study the community structure of insects in mulberry shoot in Qian an. [ Method] the dominant con- centration index, Shannon-Wiener diversity index, evenness index and the species richness index of the insect community in mulberry shoot were analyzed through systematic investigation. [ Result] There were 72 kinds of insects in the insect community in mulberry shoot, including 37 kinds of insects in subcommunity, which accounted for 51.39% of the total, and 35 kinds of insects in the non-pest subcommunity （ including natural enemy and neutral insects ） , which accounted for 48.61% of the total. The stability of the insect community structure in mulberry shoot was better, its evenness was bigger and the dominant species was not obvious. The edge effect had certain effect on the insect community structure in mulberry shoot. The biodiversity index of the insect community in mulberry shoot in the plot located at the edge of the tested field was lower and that in its central area was higher. [ Conclusion] The research provided the theoretical basis for comprehensively controlling the pests in mulberry shoot.