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[1]Li Shijie,Wei Tianxing,Yu Huan,et al.Relationship between community structure of Robinia pseudoacacia forests and soil physicochemical properties in loess region of western Shanxi Province[J].Research of Soil and Water Conservation,2025,32(06):132-140,150.[doi:10.13869/j.cnki.rswc.2025.06.015]

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Relationship between community structure of Robinia pseudoacacia forests and soil physicochemical properties in loess region of western Shanxi Province

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 32 Number of periods: 2025 06 Page number: 132-140,150 Column: Public date: 2025-10-20

Title:: Relationship between community structure of Robinia pseudoacacia forests and soil physicochemical properties in loess region of western Shanxi Province

Author(s):: Li Shijie¹,Wei Tianxing¹,Yu Huan²,Fan Dehui¹,Ye Xiaoman¹,Jiang Shan¹,Xin Pengcheng³,Xie Yu¹; (1.Shanxi Jixian National Field Scientific Observation and Research Station of Forest Ecosystem,School of Soil andWater Conservation,Beijing Forestry University,Beijing 100083,China;2.Hainan Geological Survey & Design Institute,Haikou 570100,China;3.Hainan Institute of Hydrogeology and Engineering Geological Survey,Haikou 570100,China)

Keywords:: forest plantation; plant diversity; biomass; community stability; soil physicochemical properties

CLC:: S718.5

DOI:: 10.13869/j.cnki.rswc.2025.06.015

Abstract:: [Objective] The study investigates the characteristic relationship between the community structure and soil physicochemical properties of Robinia pseudoacacia forest plantations in the loess region of western Shanxi Province and analyzes the relationship between the spatial structure characteristics and soil physicochemical properties of Robinia pseudoacacia pure and mixed forests, aiming to provide theoretical basis for forest plantation establishment and vegetation restoration and reconstruction in the loess region of western Shanxi Province. [Methods] Typical Robinia pseudoacacia pure forest plantations and mixed forests in the loess region of Shanxi Province were taken as the research objects. Field investigations were conducted using the standard plot survey method to analyze the community structure characteristics, soil physicochemical properties, and their correlations and influencing factors of Robinia pseudoacacia pure forests, Pinus tabuliformis+Robinia pseudoacacia mixed forests, and Platycladus orientalis+Robinia pseudoacacia mixed forests. [Results](1) The Margalef index and Shannon-Wiener index of the Robinia pseudoacacia mixed forests were significantly higher than those of pure forests(p<0.05), while the Simpson index and Pielou index showed no significant differences(p>0.05). The biomass of each vegetation layer in the mixed forests was significantly higher than that in pure forests(p<0.05). All Robinia pseudoacacia plantation stands were in an unstable state, and the stability of mixed forest communities was better compared to pure forests.(2) Soil organic carbon, total nitrogen, total phosphorus, and water content in the Robinia pseudoacacia mixed forests were significantly higher than those in pure forests(p<0.05), while the bulk density of each soil layer in pure forests was higher than in mixed forests. (3) In the study area, the understory plant diversity indices and biomass in the Robinia pseudoacacia forest plantations were significantly correlated with soil nutrients and water content, but the correlations among these factors in pure forests were weaker compared to mixed forests. [Conclusion] Robinia pseudoacacia mixed forests have higher understory plant diversity, shrub and herbaceous biomass, and community stability, and can effectively improve soil physicochemical properties. Therefore, Robinia pseudoacacia mixed forests are recommended for future ecological restoration projects in the loess region of western Shanxi Province.

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Last Update: 2025-12-10