人工林土壤碳的影响途径研究进展

Research Progress on Influence Pathways of Soil Carbon in Plantation Forests

人工林已成为森林资源的关键组成部分和巨大的陆地碳储库,在土壤碳固存中发挥着重要作用。随着全球气候变化加剧,有关人工林土壤碳固存的研究愈发成为关注焦点。因此,综合探讨人工林土壤碳的影响途径可为其生态恢复和经营模式提供基础理论依据,对未来应对全球气候变化提供参考,在实现森林永续利用、维护生态系统平衡方面具有重要意义。本文综述了造林树种选择、植被和根系凋落物分解、土壤呼吸、土壤微生物活动、人为扰动对人工林土壤碳固存的影响,总结了当前诸多研究中有关土壤碳周转的侧重点,梳理了相关研究中存在的矛盾性观点,并对以后有关人工林土壤碳的研究作出展望:1)应加深多种生态环境途径综合作用的研究。2)拓展对不同尺度人工林土壤碳的探索。3)重视土壤微生物−土壤理化性质−植被根系之间的互作关系。4)构建更精确的人工林经营措施体系。5)建立对人工林土壤碳的长期动态监测网络。6)细化对人工林土壤碳组分的研究。

Plantations have become a key component of forest resources and a huge terrestrial carbon reservoir,playing an important role in soil carbon sequestration.The study of soil carbon sequestration in plantations has drawn more attention from scholars as the global climate has intensified.Therefore,a comprehensive investigation into the influencing pathways of soil carbon in plantations can offer a fundamental theoretical basis for their ecological restoration and management models and serve as a reference for future responses to the conversation of global climate change and biodiversity.This is important for realizing the sustainable use of forest resources and maintaining the balance of ecosystems.This paper summarizes the effects of afforestation tree species selection,vegetation and root litter decomposition,soil respiration,soil microbial activity,and human disturbance on soil carbon sequestration in plantations.It also summarizes the focus of many recent studies on soil carbon turnover,sorts out potential conflicting findings in related studies,and provides an outlook for future research on soil carbon in plantations.1)More in-depth research should be done on several ecological and environmental pathways'combined effects.2)Increase the investigation of soil carbon at different scales in plantations.3)Pay close attention to how soil microorganisms,plant roots,and soil physicochemical properties interact.4)Construct a system of plantation management procedures that is more precise.5)Develop a dynamic long-term soil carbon monitoring network for plantations.6)Further explore the soil carbon components in plantations.