镰叶锦鸡儿湿地土壤酶活性分布特征及其与活性有机碳表征指数的关系

摘要

选取伊犁河谷昭苏县镰叶锦鸡儿湿地土壤为研究对象,研究其土壤酶活性(脲酶活性,蔗糖酶活性,过氧化氢酶活性)与土壤活性有机碳(土壤水溶性有机碳WSOC,土壤易氧化碳ROC,土壤微生物量碳MBC)的分布特征及其内在关系,分析镰叶锦鸡儿湿地土壤酶活性和土壤有机碳表征指数两者的相互关系.研究表明:镰叶锦鸡儿湿地的土壤酶活性随着土层深度的增加而下降;活性有机碳含量随土壤深度的增加,其垂直剖面的含量呈下降趋势.镰叶锦鸡儿湿地解放桥有锦鸡儿剖面的土壤酶活性和活性有机碳表征指数的含量均大于无锦鸡儿剖面,表明镰叶锦鸡儿在生长过程中可以提高土壤酶活性与活性有机碳含量;蔗糖酶,脲酶和过氧化氢酶与土壤活性有机碳呈极显著相关关系(P＜0.01),表明土壤酶对土壤活性有机碳的迁移转化起着重要作用.%Selecting the wetland soil of Caragana aurantiaca Koehne as the research object in Yili valley of Zhaosu County,the distribution characteristics and their intrinsic relationship of activities of soil enzyme (urease activity,invertase activity,catalase activity),and soil labile organic carbon (soil water soluble organic carbon WSOC,soil labile carbon ROC,soil microbial biomass carbon MBC) were studied,the relationships between enzyme activities and soil organic carbon characterization index was analysed.The results showed that the activities of soil enzyme declined with soil depth increasing.with the increasing of the soil depth,the content of the vertical profile of the active organic carbon decreased.Sickle leaf Caragana could improve activities of soil enzyme and content of active organic carbon;Invertase,urease and catalase were significantly correlated with soil labile organic carbon (P ＜ 0.01),in conclusion,the soil enzyme played an important role in the migration and transformation of soil active organic carbon.