草原植被恢复对矿区排土场土壤线虫群落多样性的影响

doi:10.12160/j.issn.1672-5190.2020.02.007

Abstract

Abstract: The mining dump is a product after the reclamation and utilization of grassland. Vegetation restoration is of great significance to the damaged grassland ecosystem. Nematodes are the main component of the grassland underground ecosystem and are sensitive to the soil environment. Accordingly, they can be used as a good indicative organism. In this study, in order to reveal the effects of grassland vegetation restoration on soil nematodes in dumping grounds of mining areas, the numbers, species, diversity and community structure of nematodes in the 0-10 cm and 10-20 cm soil layers of the dumping grounds of mining areas treated with artificial vegetation restoration for 4 and 8 years were assessed. Meanwhile, the dumping grounds of mining area without vegetation restoration treatment for 4 years and the natural grasslands without treatment were also included. The results showed that a total of 51 genera of soil nematodes were isolated in the four tested areas. Different grassland vegetation restoration ways had impacts on the species and dominance of soil nematodes. There were differences in the dominant species of soil nematodes under different restoration ways. The number and nutrient groups of the obtained soil nematodes varied among different grassland vegetation restoration ways, and the number of isolated soil nematodes and that of their corresponding genera were as follows: artificial vegetation restoration for 8 years > artificial vegetation restoration for 4 years > natural grasslands > no vegetation restoration for 4 years. The number of predatory/omnivorous nematodes in the tested areas with artificial vegetation restoration for 4 and 8 years was higher than that in the area with no vegetation restoration for 4 years, and increased diversity of the entire underground soil nematodes in the two areas with artificial vegetation restoration was observed. The H′ diversity index of the area with no vegetation restoration for 4 years was significantly （P<0.05） lower than that of the other three tested areas, which indicated that restoration of grassland vegetation exerted maturity and stability role in soil nematodes community and revealed the soil restoration status. Our results provide a theoretical basis for the selection and implementation of ecological restoration measures for dumping grounds of mining areas.

Key words: grassland vegetation, coal mining dump, soil nematode, diversity

CLC Number:

CHEN Lu, Haitang. Impact of Different Grassland Vegetation Restoration Ways on Soil Nematode Community Diversity in Dumping Grounds of Mining Areas[J]. Animal Husbandry and Feed Science, 2020, 41(2): 24-30.

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Impact of Different Grassland Vegetation Restoration Ways on Soil Nematode Community Diversity in Dumping Grounds of Mining Areas

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