Effects of Different Types of Sludge on Soil Microbial Properties:A Field Experiment on Degraded Mediterranean Soils

作     者：D.TARRASóN G.OJEDA O.ORTIZ J.M.ALCAIZ 

作者机构：Centre for Ecological Research and Forestry ApplicationsAutonomous University of Barcelona IMAR-Coimbra Interdisciplinary CentreDepartment of ZoologyUniversity of Coimbra 

出 版 物：《Pedosphere》 (土壤圈（英文版）)

年 卷 期：2010年第20卷第6期

页      面：681-691页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 0818[工学-地质资源与地质工程] 0903[农学-农业资源与环境] 0901[农学-作物学] 

基　　金：Supported by CIRIT (Consejo Interdepartamental de Investigación e Innovación Tecnológica) the Department of the Environment of the Autonomous Government of Catalonia and the Spanish Ministry of Education and Science 

主　　题：微生物特性 土壤退化 污水污泥 地中海 田间试验 类型 沙壤土 微生物代谢 

摘      要：The recycling of suitable organic wastes can enhance soil fertility via effects on soil physical, chemical and biological properties. To compare the effects of digested (DS), thermally dried (TDS) and composted dewatered (CDS) sewage sludge on soil microbiological properties, an experiment was conducted at field sites for more than one year (401 d) when applied to two Mediterranean degraded soils (loam and loamy sand soils). All three types of sewage sludge had a significant effect on measured parameters. In a short time, the plots of both loamy sand and loam soils amended with TDS showed the highest microbial basal respiration (loam soil: P 0.01; loamy sand soil: P 0.001) and carbon mineralization coefficient (loam soil: P 0.01; loamy sand soil: P 0.001). Furthermore, on loamy sand soil, the plots amended with TDS showed the highest microbial metabolic quotient (qCO 2 ) (P 0.05). This study revealed that the addition of sludge caused transient non-equilibrium effects on almost all soil microbial properties. However, there were no differences one year later because the remaining organic carbon was stable and quite similar in all treatments. These results may have practical implications for the rehabilitation of degraded soils.