Influence of salinity and water content on soil microorganisms

被引:470
作者
Yan, Nan [1 ,2 ]
Marschner, Petra [3 ]
Cao, Wenhong [1 ,2 ]
Zuo, Changqing [1 ,2 ]
Qin, Wei [1 ,2 ]
机构
[1] China Inst Water Resources & Hydropower Res, Dept Sediment Res, Beijing 100048, Peoples R China
[2] Res Ctr Soil & Water Conservat Minist Water Resou, Beijing 100048, Peoples R China
[3] Univ Adelaide, Waite Res Inst, Sch Agr Food & Wine, Adelaide, SA 5005, Australia
关键词
Salinity; Water content; Soil microorganism;
D O I
10.1016/j.iswer.2015.11.003
中图分类号
X [环境科学、安全科学];
学科分类号
08 [工学]; 0830 [环境科学与工程];
摘要
Salinization is one of the most serious land degradation problems facing world. Salinity results in poor plant growth and low soil microbial activity due to osmotic stress and toxic ions. Soil microorganisms play a pivotal role in soils through mineralization of organic matter into plant available nutrients. Therefore it is important to maintain high microbial activity in soils. Salinity tolerant soil microbes counteract osmotic stress by synthesizing osmolytes which allows them to maintain their cell turgor and metabolism. Osmotic potential is a function of the salt concentration in the soil solution and therefore affected by both salinity (measured as electrical conductivity at a certain water content) and soil water content. Soil salinity and water content vary in time and space. Understanding the effect of changes in salinity and water content on soil microorganisms is important for crop production, sustainable land use and rehabilitation of saline soils. In this review, the effects of soil salinity and water content on microbes are discussed to guide future research into management of saline soils. (C) 2015 International Research and Training Center on Erosion and Sedimentation and China Water and Power Press. Production and Hosting by Elsevier B.V.
引用
收藏
页码:316 / 323
页数:8
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