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Bulletin of Botanical Research ›› 2023, Vol. 43 ›› Issue (4): 531-539.doi: 10.7525/j.issn.1673-5102.2023.04.006

• Physiology and Ecology • Previous Articles     Next Articles

Characteristics of Rhizosphere Soil Microecological Environment of Different Ecological Restoration Vegetation in Arsenic Sandstone Areas

Jikang XU, Yanhong HE, Tingyan LIU(), Longfei HAO, Shengxi ZHANG, Zhaoyi LI   

  1. College of Forestry,Inner Mongolia Agriculture University,Hohhot 010019
  • Received:2023-01-19 Online:2023-07-20 Published:2023-07-03
  • Contact: Tingyan LIU E-mail:lty20052103@163.com
  • About author:XU Jikang(1998—),male,master degree candidate,mainly engaged in the research of mycorrhizal biotechnology.


To provide an effective supplement for ecological restoration technology in the Arsenic sandstone area, the microecological soil environment in Pinus tabulaeformis and Caragana korshinskii plantation, naturally restored grassland, and abandoned land were studied respectively. The changes in microbial community structure and microbial biomass carbon, nitrogen and phosphorus contents, soil enzyme activities related to nutrient conversion, and soil chemical properties were analyzed in different vegetation types. The correlation between soil microbial community structure and soil microecological environment was discussed, then the main influencing factors of soil microhabitat types were explored in different ecological restoration vegetation. The results showed that: (1)The soil dissolved organic carbon(C) content of P. tabulaeformis plantation was the highest of the four vegetation types, which was 4.26 mg·kg-1. The soil available nitrogen(N) content of the C. korshinskii plantation was the highest, which was 11.69 mg·kg-1. However, there was no significant difference in soil available phosphorus(P) content among P. tabulaeformis plantation, C. korshinskii plantation and natural restored grassland. (2)The enzyme activities related to nutrient conversion and soil microbial biomass C, N and P of P. tabulaeformis plantation were significantly higher than those of other vegetation types. (3)The relative abundance of soil fungi was the highest in P. tabulaeformis plantation, which was 31.36%. The relative abundance of Gram-positive bacteria in the soil of the C. korshinskii plantation and abandoned land was the highest, which were 35.73% and 37.27%. The relative abundance of soil Gram-negative bacteria increased with the decrease of available organic C. It was the lowest in P. tabulaeformis plantation(36.82%) and the highest in the natural restored grassland(42.13%). (4)The relative abundance of soil fungi was positively correlated with enzyme activities related to nutrient conversion. Gram-negative bacteria of preferred unstable C sources were less correlated with soil microecological environmental factors. Still, Gram-positive bacteria were significantly negatively correlated with the indexes of soil C conversion. (5)The Redundancy analysis showed that alkaline phosphatase was the most explainable environmental factor, and it was positively correlated with fungi and negatively correlated with Gram-positive bacteria(P<0.01). In conclusion, the stability of the microecological environment of P. tabulaeformis plantation was relatively high in the ecological restoration vegetation types of the Arsenic sandstone area, which might be used as the optimal ecological restoration tree species in the Arsenic sandstone area. The synergistic effect of alkaline phosphatase and fungi in rhizosphere soil microecological environment might effectively regulate environmental restoration in Arsenic sandstone areas.

Key words: vegetation type, microbial community structure, microbial biomass, soil enzyme activity, soil available nutrient

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