effects of soil warming on soil microbial activity

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1、Vol.10No.2肖辉林等：土壤变暖对土壤微生物活性的影响5ArticleID：1008-181X(2001)02-0138-05EffectsofSoilWarmingonSoilMicrobialActivityXIAOHui-lin1,ZHENXi-jian2(1:GuangdongInstituteofEco-environmentalandSoilSciences,Guangzhou510650,China;2:GuangzhouStationofEnvironmentalMonitoring,Guangzhou510030,China)Abstract:Theeff

2、ectsofsoilwarmingonsoilmicrobialactivityandtheconsequencesarereviewedanddiscussedinthispaper.Manystudiesshowthatthereisapositivecorrelationbetweensoilrespiration(R)andtemperature(T).Modelsoftherelationshipincludinglinearregressionanalysis,Q10relationship,powerrelationship,Arrheniusrelationshi

3、pandothershavebeenused,butusually,theycannotprovideanunbiasedestimateofrespirationrate.Nevertheless,almostallstudiesontherelationshipindicatethatsoiltemperaturestronglyinfluencemicrobialactivityandrespirationinsoil.Soilwarminginarangeoftemperaturewillincreasesoilmicrobialactivityandrespiratio

4、nrate.Onemechanismtoexplainthisobservationisashiftinmicrobialcommunitycomposition.Furtherstudiesarerequiredinordertomakeanswersmoreclearandpredicatetheeffectsofglobalwarmingonsoilmoreaccurately.Keywords:soilwarming;soilmicrobialactivity;soilrespirationCLCnumber:X172;S154.36Documentcode:A土壤变暖对

5、土壤微生物活性的影响肖辉林1，郑习健2（1：广东省生态环境与土壤研究所，广东广州510650；2：广州市环境监测中心站，广东广州510030）摘要：讨论了土壤变暖对土壤微生物活性的影响及其后果。许多研究表明，土壤呼吸与土壤温度呈正相关关系。描述这种关系所用的模式有线性回归分析、Q10关系式、幂关系式、Arrhenius关系式及其它关系式，但这些模式通常都不能准确地估计呼吸率。尽管如此，几乎所有的研究都显示土壤温度强烈地影响土壤微生物活性及呼吸。在一定温度范围内，土壤变暖提高土壤微生物活性及呼吸率。解释这种现象的一种机制是微生物群体组成随温度升高而改变。文章最后指出，为了得出更加明

6、确的结论及更加准确地预测全球变暖对土壤的影响，必须进行更深入地研究。关键词：土壤变暖；土壤微生物活性；土壤呼吸中图分类号：X172;S154.36文献标识码：AVol.10No.2肖辉林等：土壤变暖对土壤微生物活性的影响5Soiltemperatureexertsstrongcontrolovermicrobialactivity[1~3],andstronglyaffectsmicrobialrespirationinsoil[4~6].Althoughsoilrespirationisalsoverysensitivetochangesinmoisture,andthosew

7、armingeffectscouldbemodifiedbychangesinmoistureregimesthatmightaccompanyotherclimaticchanges,underintermediatemoistureconditions,temperatureexertsadominantinfluenceonmicrobialrespiration[4,7].Intheirreviewofsoilrespirationratesfromterrestrial