摘要
随着大气温室气体浓度上升和全球变暖加剧,土壤温室气体减排成为缓解气候变化的重要途径之一。林下套种是一种重要的资源利用方式,可通过多种途径影响土壤理化性质及温室气体排放。深入探讨林下套种对土壤温室气体排放的具体影响及其机制对明确林下套种在缓解全球变化中的作用至关重要。林下套种通过植物根系活动和残体输入可改善土壤物理结构,增加土壤碳氮含量,并通过改变土壤微生物的多样性和群落结构,提高微生物与酶的活性,增加CO_(2)和N_(2)O排放。此外,套种植物冠层及其凋落物层可减弱光照直射,提高土壤持水能力,从而抑制与CO_(2)和N_(2)O产生相关的微生物活性。未来的研究应综合考虑套种系统类型、套种植物多样性,以提升林下套种生态系统综合效益,为制定合理的林下管理策略和温室气体减排措施提供科学依据,助力应对全球气候变化。
With the increase of atmospheric greenhouse gas concentration and global warming,soil greenhouse gas emission reduction has become one of the important ways to mitigate climate change.Interplanting under forest is an important way of resource utilization,which can affect soil physical and chemical properties and greenhouse gas emission in many ways.In-depth discussion on the specific impact of interplanting under the forest on soil greenhouse gas emissions and its mechanism is very important to clarify the role of interplanting in mitigating global change.Interplanting under the forest can improve soil physical structure and increase soil carbon and nitrogen contents through plant root activity and residue input,and increase CO_(2) and N_(2)O emissions by changing soil microbial diversity and community structure,increasing microbial and enzyme activities.In addition,interplanting plant canopy and its litter layer can reduce direct light exposure,improve soil water-holding capacity,and thus inhibiting microbial activities related to CO_(2) and N_(2)O production.Future researches should comprehensively consider the types of interplanting system and the diversity of interplanting plants,so as to improve the comprehensive benefits of interplanting ecosystem and provide a scientific basis for the reasonable formulation of forest management strategies and greenhouse gas emission reduction measures,in order to help to deal with global climate change.
作者
易盛昌
王皓
白健
罗来聪
余雅迪
张茜
赖晓琴
黄弘远
刘熹
张令
YI Sheng-chang;WANG Hao;BAI Jian;LUO Lai-cong;YU Ya-di;ZHANG Qian;LAI Xiao-qin;HUANG Hong-yuan;LIU Xi;ZHANG Ling(Jiangxi Provincial Key Laboratory of Subtropical Forest Resources Cultivation,College of Forestry,Jiangxi Agricultural University,Nanchang 330045,China)
出处
《土壤通报》
北大核心
2025年第3期873-883,共11页
Chinese Journal of Soil Science
基金
国家自然科学基金(41967017)
江西省自然科学基金面上项目(20224BAB205032)
中央财政林业科技推广项目(JXTG[2022]06)。
关键词
套种
温室气体
全球气候变化
碳氮循环
Interplanting
Greenhouse gas
Global climate change
Carbon and nitrogen cycle
