A Study on Effect of Soil Physicochemical Properties on Enzyme Activity Using Structural Equation in Rocky Desertification Areas in Eastern Part of Yunnan Province
College of Environment Science and Engineering, Southwest Forestry University, Kunming, Yunnan 650224, China;National Station for Forest Ecosystem in Yuxi City, Yunnan Province, Xingping, Yunnan 653400, China 在期刊界中查找 在百度中查找 在本站中查找
College of Environment Science and Engineering, Southwest Forestry University, Kunming, Yunnan 650224, China;National Station for Forest Ecosystem in Yuxi City, Yunnan Province, Xingping, Yunnan 653400, China 在期刊界中查找 在百度中查找 在本站中查找
College of Environment Science and Engineering, Southwest Forestry University, Kunming, Yunnan 650224, China;National Station for Forest Ecosystem in Yuxi City, Yunnan Province, Xingping, Yunnan 653400, China 在期刊界中查找 在百度中查找 在本站中查找
National Station for Forest Ecosystem in Yuxi City, Yunnan Province, Xingping, Yunnan 653400, China;College of Forestry, Southwest Forestry University, Kunming, Yunnan 650224, China 在期刊界中查找 在百度中查找 在本站中查找
[Objective] To determine the effect of different vegetation types and nutrients on the enzyme activity in order to provide a theoretical basis for the restoration of rocky desertification areas in the eastern part of Yunnan Province.[Methods] Soil enzyme activity was used to evaluate the effect of restoration, and the soil quality evaluation method based on fuzzy mathematics was adopted to derive the soil enzyme index under different restoration approaches to compare the effect of each approach. Based on correlation analysis of soil physical and chemical activity and enzyme activity, structural equation model was adopted to quantify soil physical and chemical environment and enzyme activity environment, and then to analyze the influence of different soil physical and chemical environment on different enzyme environment.[Results] The order for enzyme activity was shrub and grass mode > mixed coniferous and broadleaf forest > broadleaf forest mode > coniferous forest mode > bare land; According to the principle of structural equation model, the sub-nutrient environment composed of total phosphorus and organic matter had a positive impact on enzyme environment which was composed of the activity of urease, catalase and polyphenol oxidase activity.[Conclusion] The shrub and grass mode and mixed coniferous and broadleaf forest both have a good effect on the recovery of rocky desertification. The influence coefficient of nutrient environment on enzyme activity was 0.87.
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