草履蚧种群地下空间分布

Spatial distribution of Drosicha corpulenta under ground

通过对草履蚧Drosichacorpulenta(Kuwana)种群地下空间分布调查的研究结果表明,草履蚧在树冠下土壤中的分布规律、分布量与距树干的距离远近有关,集中分布于树干根基部地面以下0～5cm的土层中。用多种聚集度指标分析了草履蚧种群的地下空间分布型,结果表明各组的L,mx的值均大于1;CA,I值均大于0,扩散系数C值大于置信区间上限,(C大于1)表明草履蚧在土壤中呈聚集分布。

The underground disitribution of Drosicha corpulenta （Kuwana） population was investigated. The distribution and population of the insect were correlated to distance from the base of tree truck, mainly distributing in 0 to 5 cm soil depth from the base of tree truck. The analysis of spatial distribution pattem using various distribution pattem indices indicated L, m^＊ /x^- and C were greater than 1, and CA and I were greater than 0, demonstrating that the insect was aggregative distribution.