摘要
[目的]揭示土壤碳库对植被恢复的响应特征和机理,为我国“生态系统碳中和”提供科学指导,助力实现国家“碳达峰、碳中和”目标。[方法]基于国内外有关黄土高原植被恢复固碳效应的文章,对土壤碳库地区差异、碳储量驱动因素、植被固碳机制进行了归纳分析。[结果](1)土壤碳储量的主要影响因素包括植被特征(恢复年限、凋落物输入和根系分泌物)、气候变化(降水和温度)、土壤性质(土壤生物和土壤氮输入)等。(2)黄土高原植被固碳效应存在明显的地区差异,植被恢复模式对土壤碳库具有重要影响。(3)植被恢复通过改变土壤侵蚀过程对土壤碳库造成的间接影响不容忽视。[结论]深入揭示恢复生态系统土壤碳汇过程和驱动机制,细化生态环境分区,对于准确评估黄土高原土壤有机碳库、提高有机碳循环过程模型精度至关重要。未来亟需加强对深层土壤碳库、无机碳库及区域尺度上土壤碳循环等方面的研究。
[Objective]The aims of this study are to reveal the response characteristics and mechanism of soil carbon pool to vegetation restoration,to provide scientific guidance for‘ecosystem carbon neutrality’in China,and help to achieve the national goal of‘carbon peak and carbon neutrality’.[Methods]Based on the articles on the carbon sequestration effect of vegetation restoration in the Loess Plateau at home and abroad,the regional differences of soil carbon pool,the driving factors of carbon storage and the mechanism of vegetation carbon sequestration were summarized and analyzed.[Results](1)The main influencing factors on soil carbon storage include vegetation characteristics(restoration years,litter input and root exudates),climate change(precipitation and temperature),soil properties(soil organisms and soil nitrogen input).(2)There are obvious regional differences in the carbon sequestration effect of vegetation on the Loess Plateau,and the vegetation restoration model has an important impact on the soil carbon pool.(3)The indirect effect of vegetation restoration on soil carbon pool by changing soil erosion process cannot be ignored.[Conclusion]It is very important to reveal the process and driving mechanism of soil carbon sink in the restored ecosystem and refine the ecological environment division for accurately assessing the soil organic carbon pool in the Loess Plateau and improving the accuracy of the organic carbon cycle process model.In the future,it is urgent to strengthen the research on deep soil carbon pool,inorganic carbon pool and soil carbon cycle at regional scale.
作者
周也琛
邵明安
魏孝荣
陈明玉
李同川
Zhou Yechen;Shao Mingan;Wei Xiaorong;Chen Mingyu;Li Tongchuan(College of Natural Resources and Environment,Northwest A&F University,Yangling,Shaanxi 712100,China;Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China;College of Resources and Environment,University of Chinese Academy of Sciences,Beijing 100190,China;Institute of Soil and Water Conservation,CAS&MWR,Yangling,Shaanxi 712100,China;College of Soil and Water Conservation Science and Engineering,Northwest A&F University,Yangling,Shaanxi 712100,China)
出处
《水土保持研究》
CSCD
北大核心
2024年第6期395-405,共11页
Research of Soil and Water Conservation
基金
陕西省自然科学基础研究项目(2023-JC-QN-0217)
中国高校科学基金(2452022335)
中国科学院战略性先导科技专项(XDB40000000)。
