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-  2013 

近30年土地利用变化对新疆森林生态系统碳库的影响

DOI: 10.11821/dlyj201311002

Keywords: 土地利用变化,森林生态系统,碳库,新疆

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Abstract:

摘要: 土地利用及其变化是导致森林生态系统碳库变化最重要的因素。以植树造林面积、森林产品收获产量及林地转移面积为基础数据,采用《LULUCF指南》中数据分层的碳源汇计量方法,分析了1975-2005 年期间三种土地利用方式对新疆森林碳库的影响。1975 年新疆森林总碳库估算值为720.02 Tg,其中土壤碳库为528.82 Tg。近30 年土地利用变化对其碳库的影响总体表现为碳汇,固碳量为48.15 Tg,与1975 年碳库相比,森林碳储量增长了6.69%。植树造林表现出强烈的碳汇功能,总固碳量为54.24 Tg。森林采伐是最主要的碳释放来源,共释放碳5.42 Tg。林地转移呈现微弱的碳释放特征,共排放为0.66 Tg。研究结果表明,土地利用变化对该区域森林碳库具有明显的增汇效应。本研究将有利于进一步深化人类活动对区域碳平衡影响的认识

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