基于结构方程的滇东石漠化地区土壤理化性质与酶活性研究  

A Study on Effect of Soil Physicochemical Properties on Enzyme Activity Using Structural Equation in Rocky Desertification Areas in Eastern Part of Yunnan Province

作　　者：舒树淼 赵洋毅[1,2] 胡慧蓉[1] 熊好琴[1,2] 段旭[2,3] 

机构地区：[1]西南林业大学环境科学与工程学院,云南昆明650224 [2]云南玉溪森林生态系统国家定位观测研究站,云南新平653400 [3]西南林业大学林学院,云南昆明650224

出　　处：《水土保持通报》2016年第3期338-345,共8页Bulletin of Soil and Water Conservation

基　　金：云南省教育厅研究项目"滇东曲靖石漠化地区不同植被恢复模式对土壤质量的影响研究"(2013Y114);云南省高校优势特色重点学科(生态学)建设资助项目(05000511311);国家林业局林业科技创新平台项目(2015-LYPT-DW-138);云南省应用基础研究项目(2012FD028)

摘　　要：[目的]明确滇东石漠化地区不同恢复模式效果差异以及养分对酶的影响关系,为石漠化地区恢复措施提供理论依据。[方法]以土壤酶活性为恢复效果的衡量指标,采取基于模糊数学的土壤质量评价办法,得到不同模式下土壤酶指数,用以比较恢复模式的效果。基于土壤理化性质与酶活性相关性分析的结果,采取结构方程模型量化土壤理化环境和酶活性环境,进而分析不同土壤理化环境对不同酶环境的影响。[结果]酶活性大小排序为:灌草模式>针阔混交林模式>阔叶林模式>针叶林模式>裸地;由结构方程模型和有机质、全磷估计出的养分子环境对由脲酶活性、过氧化氢酶、多酚氧化酶活性构成的酶活性环境存在显著正影响。[结论]灌草模式和针阔混交林模式对石漠化恢复有较好作用。养分环境对酶活性环境的影响系数为0.87。[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 modemixed coniferous and broadleaf forest broadleaf forest modeconiferous forest modebare land;According to the principle of structural equation model,the sub-nutrientenvironment 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.

关 键 词：喀斯特 石漠化 植被恢复模式 土壤养分 酶活性 结构方程模型 滇东 

分 类 号：S154.2[农业科学—土壤学]