Research Progress in Changing Carbon Input on Soil Microbial Carbon Metabolic Function
Carbon input from litter and roots into soil are important components in nutrient cycling in forest ecosystems.Global climate change and human activities lead to significant changes in the quality and quantity of carbon input from litter and roots into soil,resulting in significant uncertainty in soil microbial carbon metabolism.This paper reviewed the research progress in the impact of changing carbon input on microbial carbon metabolism in forest soil.The main results were as below.(1)There was uncertainty in the effect of litter addition on soil microbial carbon metabolic function,which varied with climate zones and forest types;(2)Most of the studies showed that removing litter reduced metabolic function of soil microbial carbon sources;(3)There is still uncertainty about the effect of root removal on microbial carbon metabolism function,which varied with climate zones and forest types;(4)Removing both litter and roots(no inputs)reduced the carbon source metabolism function of soil microorganisms;(5)The impact of adding and removing litter on the metabolic function of soil microbial carbon sources was mainly influenced by changes in physical and chemical properties such as soil carbon and nutrient availability and soil microbial community structure.This review can deepen our understanding of effects of litter and roots on soil carbon metabolism processes and carbon sink functions,providing a theoretical basis for forest restoration.
litterrootsoil microorganismscarbon metabolic function
万方数据
维普
