【摘要】 黄土高原退耕地在恢复过程中,植被从沙蓬(Agriophyllum arenarium)单优群落向以达乌里胡枝子(Lespedeza davurica)为优势种的群落演替,土壤无脊椎群落随着退耕年限的增加由简单向复杂化演变。退耕地土壤无脊椎动物优势类群主要为线虫、螨类、拟步甲科、象甲、土蝽科和金龟甲科等组成,土壤无脊椎动物从退耕1年的14类逐步增加到7年的28类,土壤无脊椎动物的多样性指数与退耕年限呈正相关关系。土壤无脊椎动物类群的增加前期快后期慢,土壤无脊椎动物的多样性增加主要由植被和土壤的改善决定。更多还原

【Abstract】 The vegetation on abandoned farmland in the Loess Plateau of China evolved in succession from Agriophyllum arenarium community to Lespedez adavurica community,simultaneously,the soil invertebrate community changed from simply to complex.The species of soil invertebrate changed from 14(1 year after restored)to 28(7 years after restored),and the dominant soil invertebrate in abandoned farmland are Nematodes,Acarina,Tenebrionidae,Curculionidae,Cudnidae and Scarabaeoidae.The biodiversity of soil invertebrate is positively correlated to the restoration duration.More soil invertebrate species was recruited at the initial stage of restoration;the succession of soil invertebrate dependes on vegetation and soil water.更多还原