几个环境因子对凋落物分解的影响  

Effects of several environmental factors on litter decomposition

作　　者：卜涛[1,2] 张水奎[1,2] 宋新章[1,2] 江洪[1,2] 

机构地区：[1]浙江农林大学亚热带森林培育国家重点实验室培育基地,浙江临安311300 [2]浙江农林大学浙江省森林生态系统碳循环与固碳减排重点实验室,浙江临安311300

出　　处：《浙江农林大学学报》2013年第5期740-747,共8页Journal of Zhejiang A&F University

基　　金：国家自然科学基金面上资助项目(31070440);国家重点基础研究发展计划("973"计划)资助项目(2011CB302705);浙江农林大学人才启动基金资助项目(2012FR023)

摘　　要：凋落物分解是陆地生态系统物质循环的一个重要环节。在介绍凋落物分解一般过程及其影响因素的基础上,论述了全球环境变化背景下,酸沉降增加、林火增多、土地利用变化等环境因子对凋落物分解的影响。酸沉降通常是影响凋落物分解的重要因素之一,其中氮沉降对凋落物分解有促进、抑制或无明显影响等3种作用。林火发生后短期内对凋落物分解有抑制作用,长期则逐渐转变为积极的促进作用。土地利用变化则因转变方式不同而对凋落物分解产生积极或消极的影响。今后亟待加强多个环境因子对凋落物分解复合作用影响的研究和长期观测。Litter decomposition is an important part of biogeochemical cycle in terrestrial ecosystems.This paper firstly described the general process of litter decomposition and the factors influencing decomposition.Then the effects of several environment factors,including acid deposition,forest fire,land use change,on litter decomposition were discussed.Acid deposition played an important role in the litter decomposition.As a main type of acid deposition,nitrogen deposition could promote,inhibit or have no significant effect on litter de composition.Forest fire would inhibit litter decomposition in a short period of time,but would accelerate decomposition in the long time.The land use change could have a positive or negative effect on litter decomposition depending on the different ways of the change.The future research should focus on the combined interaction of multiple environmental factors on the litter decomposition.

关 键 词：森林生态学 凋落物分解 酸沉降 林火 土地利用变化 复合作用 综述 

分 类 号：S718.5[农业科学—林学]