摘要
苜蓿害虫群落结构有以下特点：同翅目害虫是苜蓿地上最繁盛的一个类群，其科数、种数、个体数都是最多；半翅目害虫的科数、种数次之，但个体数较少；直翅目害虫的科数、种数居第三位，但个体数多于半翅目，居第二位。群落多样性指数４月份达最高，为１．９７３；９月份害虫种类最多，指数为１．７４０。本研究着重探讨了不同时期苜蓿害虫群落的相似性和稳定性；对害虫群落树状图聚类分析及排序的结果表明：害虫群落可聚类为两个亚群落。同时对害虫群落作了动态聚类分析。
The structure Characteristics of insect pest community on medic were as follows: the number of family, species and individual of homopteran was the most, and hemipterous insect was the next in family and species, and the third in individual number, orthopteran was the third in family and species and the second in individual number. The community diversification reached peak in April, with the diversification index 1.973. The species of inect pest got the most in September , with the index 1.740. The cluster analyses showed that the insect pest community could be divided into two sub-communities. The similarity and stability of insect pest community at different stages were also discussed in the paper.
出处
《江西农业学报》
CAS
1998年第2期47-53,共7页
Acta Agriculturae Jiangxi
关键词
苜蓿害虫
群落
多样性指数
聚类分析
牧草虫害
Insect pests on Medicago sativa L.
Community
Diversification index
Cluster analysis
Dendrogran
