首页|干旱半干旱区土地利用/覆被类型变化对土壤有机碳动态影响的研究进展

干旱半干旱区土地利用/覆被类型变化对土壤有机碳动态影响的研究进展

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土壤碳库是陆地生态系统碳库的重要组成部分,其小幅度变化即可影响植被的养分供应和碳素在土壤与大气之间的交换,进而响应和反馈全球变化.土地利用/覆被类型变化是影响土壤碳储量和土壤碳排放的重要因素,研究不同土地利用/覆被的土壤碳效应对于提高区域土壤碳储量,改善生态环境具有重要意义.本文概述了我国干旱半干旱区不同土地利用/覆被类型下的土壤有机碳动态研究进展,系统阐述了土地利用/覆被类型变化对土壤碳库和土壤碳排放的影响,明确了土地利用/覆被类型变化下土壤有机碳动态的主要影响因素.然而,关于城市建设和城市扩张导致的土地利用/覆被类型变化对土壤有机碳动态影响的研究还十分薄弱.这限制了我们对土地利用/覆被类型变化引起的土壤碳效应的全面理解.因此,在气候变化背景下,应加强城市建设和城市扩张过程中土地利用/覆被类型变化对土壤有机碳动态影响的研究,特别是在干旱、半干旱区土地利用变化的热点区域.这些问题的深入研究将有助于提高我们对干旱、半干旱区不同土地利用/覆被类型下土壤有机碳动态变化的科学认知水平,为科学利用和保护有限的土壤资源,制定可持续的土地利用方案,增加土壤碳固存潜力和减缓土壤碳排放提供理论依据.
Review of the effects of land use/cover change on soil organic carbon dynamic in arid and semi-arid areas
Soil is an important part of terrestrial ecosystem carbon pool.The small change of soil carbon pool not only affects nutrient supply to vegetation,but also affects soil carbon emission and exacerbates global climate change.Land use/cover change is an important factor affecting soil carbon storage and soil carbon emission.It is of great significance to examine the effects of different land use/cover change on soil carbon for improving regional soil carbon storage and ecological environment.We summarized the research progress of soil organic carbon dynamics in arid and semiarid areas in China,systematically described the impacts of land use/cover change on soil carbon pool and soil carbon emission,and identified the main factors influencing soil organic carbon dynamics under land use/cover change.Less attention has been paid to the effects of land use/cover change caused by urban construction and urban expansion on soil carbon dynamic,which limits our comprehensive understanding of the effects of land use/cover change on soil carbon.Therefore,future research should pay more attention to the impacts of land use/cover change on soil organic carbon dynamics during urbanization in the context of climate change,especially in the hot spots of land use change in arid and semi-arid areas.In-depth study of these issues will improve our understanding of soil carbon dynamics under land use/cover change in arid and semi-arid areas and provide theoretical basis for scientific utilization and protection of limited soil resources,formulating sustainable land use programs,increasing soil carbon sequestration potential,and mitigating soil carbon emissions.

land use/cover changesoil carbon coolsoil carbon emissionclimate changeurbanization

张蕊、赵学勇、王瑞雄、胡晋瑜、赵思腾

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中国科学院西北生态环境资源研究院,奈曼沙漠化研究站,兰州 730000

中国科学院西北生态环境资源研究院,乌拉特荒漠草原研究站,兰州 730000

中国科学院大学,北京 100049

榆林市横山区二石磕林场,陕西榆林 719100

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土地利用/覆被变化 土壤碳库 土壤碳排放 气候变化 城市化

甘肃省科技计划项目国家自然科学基金项目国家自然科学基金项目

21JR7RA0654220753842177456

2024

生态学杂志
中国生态学学会

生态学杂志

CSTPCD北大核心
影响因子:1.439
ISSN:1000-4890
年,卷(期):2024.43(7)