沈北新区不同土地利用类型土壤磷酸酶活性特征及其影响因素分析  

Analysis of activity characteristics and influencing factors of soil phosphatase in different types of land in Shenyang North New Area

作　　者：李冰 李玉双 魏建兵 宋雪英 史荣久[2] 周纪东[2] 侯永侠 陈琳 刘厶瑶 陈红亮 LI Bing;LI Yushuang;WEI Jianbing;SONG Xuying;SHI Rongjiu;ZHOU Jidong;HOU Yongxia;CHEN Lin;LIU Siyao;CHEN Hongliang(Key Laboratory of Regional Environment and Eco-Remediation of Ministry of Education,Shenyang University,Shenyang 110044,China;Key Laboratory of Pollution Ecology and Environmental Engineering,Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang 110016,China)

机构地区：[1]区域污染环境生态修复教育部重点实验室,沈阳大学环境学院,沈阳110044 [2]污染生态与环境工程重点实验室,中国科学院沈阳应用生态研究所,沈阳110016

出　　处：《生态科学》2019年第4期48-55,共8页Ecological Science

基　　金：国家自然科学基金青年科学基金项目(21307084),国家自然科学基金面上项目(41771200; 41171399);沈阳市科学事业费竞争性选择项目(城市生态环境风险管理与修复技术);沈阳市科技局项目(17183900);辽宁省自然科学基金计划重点项目(20170520362),辽宁省自然科学基金指导计划项目(2019-ZD-0550)

摘　　要：采用均匀网格布点法采集沈阳市沈北新区不同土地利用类型101个表层(0-20cm)土壤样品,测定了土壤磷酸酶活性、土壤理化性质和土壤细菌群落组成,分析了不同利用类型土壤磷酸酶活性变化特征及其与土壤理化性质、土壤细菌优势菌群之间的关系。土壤酶活力测定结果表明,沈北新区不同利用类型土壤磷酸酶活性由高到低依次为:城市绿地>旱田>天然林地>水田;相关分析结果表明,土壤磷酸酶活性与土壤pH值、含水量、粘粒、粉粒、总磷呈极显著负相关关系,与砂粒呈极显著正相关关系,上述土壤理化性质是影响土壤磷酸酶活性的主要因素;冗余分析结果表明,疣微菌门(Verrucomicrobia)、放线菌门(Actinobacteria)和酸杆菌门(Acidobacteria)对土壤磷酸酶活性影响较大,其菌群丰度主要受土壤pH、含水量和总磷的调控,且其随土壤pH、含水量和总磷的变化特征与土壤磷酸酶活性变化趋势相一致,提示这些菌群可能是土壤磷酸酶的重要来源。In order to analyze the changes of activity characteristics of soil phosphatase in different utilization types of land and their relationship with soil physicochemical properties and soil dominant bacterial flora, 101 surface(0-20 cm) soil samples of different utilization types of land in Shenyang North New Area were sampled by a uniform grid distribution method. Soil phosphatase activities, soil physicochemical properties and bacterial community composition of the collected samples were studied. Results show that the soil phosphatase activities of different utilization types of soil in Shenyang North New Area rang in order: urban green land>dry land > natural forest land > paddy soil. The correlation analysis results illustrate that soil phosphatase activity has significant negative correlations with soil pH, water content, clay content, powder content and total phosphorus but a significant positive correlation with soil sand content, and soil physical and chemical properties mentioned are all main factors affecting soil phosphatase activity. The redundancy analysis displays that the soil phosphatase is mainly influenced by Verrucomicrobia, Actinobacteria and Acidobacteria. The flora abundance is mainly regulated by soil pH, water content and total phosphorus, and its variation is consistent with the change trend of soil phosphatase activity, indicating that these bacteria may be important sources of soil phosphatase.

关 键 词：土地利用类型 土壤磷酸酶 土壤理化性质 土壤细菌群落 

分 类 号：S154.2[农业科学—土壤学]