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中文摘要：
2008年6月至10月,通过田间试验,设置对照稻田和养鱼稻田2个处理,采用分层取样法和大类群分类法,利用反映土壤动物群落结构数量特征的多样性指数、均匀性指数和优势度指数,研究了泥鳅对稻田土壤动物群落的扰动效应。结果表明,稻田土壤动物群落的优势类群为腹足类、线虫类和线蚓类。稻鱼复合系统土壤动物类群数高于对照稻田,但土壤动物个体数少于对照稻田。稻鱼复合系统土壤动物多样性指数和均匀性指数高于对照稻田,但优势度指数低于对照稻田,显示稻鱼复合系统具有更高的稳定性和抗干扰能力。稻田土壤动物的垂直分布具有明显的表聚性。
英文摘要：
A field experiment of two treatments（control plot and rice-fish system） was carried out in paddy field during the period from June to October 2008,to study bioturbation effects of Misgurnus anguillicaudatus on soil animal community in paddy field,using the multi-tier sampling method and macro-group classification method,and diversity index,evenness index,and dominance index that represents structural and quantitative characteristics of soil animal community.Results show that the dominant groups in the soil animal community are Gastropoda,Nematoda,and Enchytraeidae.Compared with the control plot,the rice-fish system has more groups but less individuals of soil animals.The diversity index and evenness index of the soil animals are higher,while the dominance index is lower in the rice-fish system than in the control plot,indicating the rice-fish integrated system is higher in stability and resistance against disturbance.Vertically,soil animals in paddy field concentrate mainly in surface soil profile.
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