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对大兴安岭不同冻土带中小型土壤动物进行调查,共获土壤动物14561只,隶属于4门、8纲、19目。中小型土壤动物的水平分布调查表明,同一冻土带土壤动物的个体数量和类群数量差异性不显著(α<0.05)。同一冻土带中小型土壤动物的个体数量和类群数量分布一致,而且都是次生林最多,耕地最少。垂直分布调查表明,不同土层中小型土壤动物的个体数量和类群数量差异性显著(α<0.05)。土壤动物的个体数量和类群数量表聚性非常明显。中小型土壤动物的多样性调查表明,同一冻土带内,DG指数均是次生林最大,耕地最小;而Shannon-Wiener指数表现不明显。中小型土壤动物的个体数量和类群数量与有机质和全氮的灰色关联系数大,说明这两个因子对土壤动物个体数量和类群数量影响较大;中小型土壤动物的多样性指数与PH值和地温值的灰色关联系数大,说明这两个因子对土壤动物多样性影响较大。
A survey was conducted on small and medium sized soil animals in different tundra in Greater Hinggan Mountains. A total of 14,561 soil animals were found, belonging to 4, 8 and 19 orders. Investigation of the horizontal distribution of soil fauna showed that there was no significant difference (α <0.05) in the number of individuals and the number of taxa in soil animals in the same tundra. In the same tundra, the numbers of soil and small-sized soil fauna are the same as the number of taxa, and most of them are secondary forests with the least cultivated land. Vertical distribution survey showed that there was significant difference (α <0.05) in the number of individuals and the number of taxa in soil soils from different soil layers. Soil animals, the number of individuals and the number of cohesion table is very obvious. The investigation of the diversity of small and medium-sized soil animals showed that the DG index was the largest in secondary forest and the farmland was the smallest in the same tundra, while the Shannon-Wiener index was not obvious. Small and medium-sized soil animal number of individuals and the number of gray matter and organic matter and total nitrogen gray correlation coefficient, indicating that these two factors on the number of soil animals and individuals significantly affected the number of species; small and medium-sized soil animal diversity index and PH value and The gray correlation coefficient of geotemperature value is large, indicating that these two factors have a great impact on the diversity of soil animals.