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本文比较了柑桔树冠不同部位昆虫群落的组成、数量、优势度、多样性、均匀度和群落内个体总数的差异。结果表明,树冠上、中、下和内、外的差异比东、南、西、北间的差异大,位点间相距越远,差异越大。采用Hill的相互平均法对树冠东、南、西、北,上、中、下和内、外共24个位点及17个物种分别进行二维排序,揭示了柑桔主要害虫及天敌在树冠内的分布及树冠各部位昆虫群落的差异,从而把桔园昆虫群落分为外上中层及内下层两个亚群落,为桔园昆虫群落的抽样调查及害虫防治措施的制定提供了依据。
In this paper, we compared the composition, quantity, dominance, diversity, evenness and the total number of individuals in the insect community in different parts of citrus crown. The results showed that the differences among the upper, middle, lower, inner and outer canopies were larger than those between the east, south, west and north, and the farther apart the loci, the greater the difference. Using the mutual average method of Hill, two-dimensional sorting of 24 sites and 17 species in East, South, West, North, Upper, Middle, Lower, Inside and outside of the canopy were conducted respectively, revealing that the main pests and natural enemies of citrus The distribution and the differences of insect communities in different parts of the canopy, so as to divide the insect community into two sub-communities, ie, the upper outer middle layer and the lower inner layer, which provided the basis for the sampling investigation and pest control measures of the insect community in the orange garden.