摘要
放牧主要通过影响草地生态系统中土壤的理化性质(土壤含水率、孔隙度、微生物和有机物含量的构成)来影响整个生态系统温室气体的排放。草地生态系统土壤中,植物根系的呼吸作用、土壤微生物的活动以及各种物理、化学和生物作用为温室气体的主要来源。本文在阐述草地生态系统温室气体排放机制和作用的基础上,主要从放牧管理模式、放牧强度、放牧动物等放牧作用对草地生态系统温室气体的排放情况进行了综述,就今后放牧对草地生态温室气体的研究重点和方向进行了展望,总结了适合不同放牧条件下整个生态系统温室气体的减排措施。
Grazing affects grassland greenhouse gas(GHG) emissions by changing the physical and chemical properties of soil,such as the soil water content,porosity,and microbe and organic matter contents. Respiration of plant roots,soil microbial activities,and various physical,chemical,and biological functions in grassland ecosystems are the main sources of GHGs. Based on the mechanism and function of GHG emissions in grassland ecosystems,this paper reviews the GHG emissions in grassland ecosystems from grazing management,grazing intensity,and grazing animals. The effects of grazing on GHGs in grassland ecosystems,the focus and direction of research prospects,and a summary of the measures taken in different ecosystems to reduce GHGs are discussed in this paper.
出处
《草业科学》
CAS
CSCD
2018年第2期256-265,共10页
Pratacultural Science
基金
国家自然科学基金(31402118)
国家重点研发计划(2016YFC0501904-02)
中央高校基本科研业务经费专项基金(lzujbky-2015-251)
