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Forest and Grassland Resources Research ›› 2024›› Issue (2): 51-58.doi: 10.13466/j.cnki.lczyyj.2024.04.007

• Scientific Research • Previous Articles     Next Articles

Plant Diversity in Mine Dumps and Its Coupling Relationship with Soil Physicochemical Indices

MA Yuan1,2(), ZHANG Jingbo1(), LIN Fangchun1, XIN Zhiming1,2, LUO Fengmin1,2, YANG Yaoke1, GUO Junting1, WANG Jiapeng1   

  1. 1. Experimental Center of Desert Forestry,Chinese Academy of Forestry,Dengkou 015200,Inner Mongolia,China
    2. National Observation Research Station of Inner Mongolia Dengkou Desert Ecosystem,Dengkou 015200,Inner Mongolia,China
  • Received:2023-12-03 Revised:2024-04-06 Online:2024-04-28 Published:2024-09-02

Abstract:

To explore the coupling relationship between plant diversity and soil physicochemical indices in Manlailiang mining area,Ordos,under different restoration years,with the aim to reveal the interaction between vegetation and soil in ecological restoration,and to provide a scientific basis for optimizing vegetation restoration strategies and evaluating restoration effects.The physical and chemical indexes of vegetation and soil with restoration years ranging from 2 to 12 years were selected as the research objects.Vegetation and soil properties in different parts were investigated by comparing with the original landform,and the interaction and mode of action were revealed by correlation analysis.The results show that:1) A total of 51 species were surveyed in the study area,primarily consisting of Asteraceae,Gramineae and Fabaceae,which accounted for 61% of the total plants.2) Plant diversity exhibited significantly change over time,with the number of species first decreasing and then increasing,Margalef and Shannon-Weiner indices also follow this pattern,initially decreasing and then increasing.Pielou and Simpson indices,however,did not show significant change.3) Moderate to strong correlations were observed between plant diversity index and soil physicochemical index,particularly pH and total phosphorus,which had close correlated with plant diversity.4) During the initial stage of restoration,the coordination degree between plant diversity and soil physical and chemical indices increased,then decreased as restoration years increased,and subsequently increased again.The highest coordination degree was observed after 6 years of restoration.Repair measures have a positive effect on the balanced development of both aspect,but continuous maintenance and optimization are necessary to achieve the best coordination level.

Key words: mine dumps, plant diversity, grey relational analysis, coupling analysis

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