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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。
During the process of restoration of the cultivated land in the Loess Plateau, the vegetation succession changed from the single superior community of Agriophyllum arenarium to the dominant species of Lespedeza davurica, and the soil invertebrate community increased with the increase of returning farmland Simple to complex evolution. The main invertebrate invertebrates in the reclaimed farmland are nematodes, mites, Pediculidae, weevil, Pedicularis and Metallopodidae. Soil invertebrates increased gradually from 14 classes of one year after the withdrawal of cultivated land to 7 years There was a positive correlation between the diversity indices of soil invertebrates and the years of returning farmland. The increase in soil invertebrate fauna was rapid in the early period and the increase in the diversity of soil invertebrates was mainly determined by the improvement of vegetation and soil.