[1]YAO Yiwen,DAI Quanhou,LIN Zhihuan,et al.Response of Soil Physical and Chemical Properties and Species Diversity to Accumulation Body of Earth-rock Mixing Engineering[J].Research of Soil and Water Conservation,2021,28(02):41-48.
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Response of Soil Physical and Chemical Properties and Species Diversity to Accumulation Body of Earth-rock Mixing Engineering
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 02
Page number:
41-48
Column:
Public date:
2021-02-06
- Title:
- Response of Soil Physical and Chemical Properties and Species Diversity to Accumulation Body of Earth-rock Mixing Engineering
- Keywords:
- engineering accumulation; species diversity; soil physical and chemical properties; karst district
- CLC:
- Q948.1
- DOI:
- -
- Abstract:
- To explore the interaction between species diversity and soil physical and chemical properties in the process of vegetation restoration in the karst area soil-rock mixing project, taking the recovery time of different recovery periods(1, 2, 4, 6 years)according to the slope dumping engineering accumulation body as the research object, using the ‘space instead of time' research method, we studied the characteristics and mutual response mechanisms of soil physical and chemical properties and plant species diversity at different recovery times. The results showed that: with the increase of recovery time, the plant species on the table and slope of the soil-rock mixed deposits showed an upward trend and then decreased, and the plant species(99)on the slope were more than the table(74), and the plant community gradually changed from herbs to mixed grass and shrub; the species richness, diversity, dominance, and evenness index of the table and slope all increased first and then decreased with the increase of recovery time; with the increase of vegetation recovery time, the soil physical and chemical properties improved to varying degree, among which the contents of TN, TK, AP and SOM increased significantly, and the soil nutrient content showed an upward trend; redundancy analysis showed that MC, BD, TN, TK and AK had a greater impact on plant species diversity within different recovery periods; potassium had a greater impact on species diversity within a shorter recovery time; the effect of nitrogen gradually increased with the recovery time, MC and BD had more impact on the tabletop species diversity than the slope, and soil nutrient factors had a greater impact on the slope. Therefore, when carrying out vegetation restoration on the mixed rock-soil accumulation body, measures such as adding mulch in the early stage of restoration to reduce water loss and applying K fertilizer as far as possible to ensure the survival of plants should be taken. The species of plant species are leguminous plants that can retain water and soil and interact with soil microorganisms to supplement nutrients in the soil.
- References:
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Last Update:
2021-02-10