白三叶草坪昆虫群落调查及分析

Investigation and Analysis on Insects Community of Trifolium repens Lawn

通过对白三叶草坪的昆虫群落系统调查,运用群落的重要指标:样本昆虫数(S)、丰富度(N)、多样性指数(H')、均匀度(J)对该群落进行了分析,基本搞清了白三叶草坪昆虫群落的组分及其群落的演替情况。结果显示白三叶草坪昆虫群落由43种组成,分属13个目。其中,鞘翅目和半翅目是群落主体,蜗牛和豆象是害虫的优势种群,蜘蛛和瓢虫是天敌的优势种群。不同季节昆虫群落害虫和天敌的演替情况不同,尤其以夏末至秋季阶段最为突出。本研究为白三叶草坪的管理提供了科学理论依据。

The investigation on the insect community of Trifolium repens lawn was carried out using the four important indexes, i.e., the sample insects amounts（S）, the richness （N）, the diversified index （H^1） and the evenness index （J）. The components and succession of this community were clarified. The results showed that the insect community of Trifolium repens lawn was consisted of 43 species in 13 orders, and the main components of this community were Coleoptera and Heminoptera, and the dominant species were Stylommatophore and Bruchidae. Moreover, Araneida and Coccinellidae are the dominant species of natural enemies. Each seasons had their own features of the pests and the natural enemies in this community, especially in late of summer. The results of this study could provide scientific basis for IPM of Trifolium repens lawn.