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Distribution pattern of meso-micro soil fauna in Eucalyptus grandis plantation

, : Distribution pattern of meso-micro soil fauna in Eucalyptus grandis plantation. Yingyong Shengtai Xuebao 17(12): 2327-2331

In this paper, meso-micro soil fauna were extracted and collected by Baermann's and Tullgren's method, and their distribution pattern in the Eucalyptus grandis plantation of Hongya County, Sichuan Province was studied. A total of 13 550 specimens were collected, belonging to 6 phyla, 13 classes, and 26 orders. Acarina, Nematoda, Collembola were the dominant groups, and Enchytraeidae was the frequent one. The group and individual numbers of meso-micro soil fauna varied with seasons, being the maximum in autumn or winter, fewer in summer, and the minimum in spring. The density of meso-micro soil fauna in soil profile decreased rapidly with increasing soil depth, but a converse distribution was observed from time to time in 5 similar to 10 cm and 10 similar to 15 cm soil layers. The meso-micro soil fauna collected by Baermann's and Tullgren's method had a density of 3.333 x 10(3) similar to 2.533 x 10(5) ind . m(-2) and 1.670 x 10(2) similar to 2.393 x 10(5) ind . m(-2), respectively, and the decreasing rate of the density with the increase of soil depth was higher for those collected by Tullgren's method. The density-group index of meso-micro soil fauna in the E. grandis plantation was the lowest in spring, but the highest in autumn or summer. There were no significant differences in the density of meso-micro soil fauna and in the density-group index between E. grandis plantation and Quercus acutissima secondary forest.


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