生态学报2017，Vol.37Issue(1)：54-62,9.DOI:10.5846/stxb201608091636
氮、磷养分有效性对森林凋落物分解的影响研究进展
Effect of nitrogen and phosphorus availability on forest litter decomposition
摘要
Abstract
Nitrogen (N) and phosphorus (P) are the two most important elements for building plant proteins and genetic material,limiting forest production,and other ecosystem processes,and they profoundly affect litter decomposition.Litterquality parameters,particularly initial lignin and N contents,ratios of C ∶N,and lignin:N often correlate strongly with rates of litter mass loss in temperate and boreal forests.Furthermore,soil N availability and N addition also affect litter decomposition.In tropical and subtropical forests,where highly weathered soil is frequently observed,P could be more important than N in inhibiting litter decomposition.However,P has not been considered in most current ecosystem carbon cycling models,but fertilization experiments show different responses of litter decomposition rates to nutrition addition.Synergistic,antagonistic,and neutral effects can be observed.Both the "basic stoichiometric decomposition theory" and "microbial nitrogen mining" hypothesis have been used to explain litter decomposition rate variations with nutrition addition.Regarding rigid C ∶N ∶P ratios in microbial decomposers,different nutrition sources could result in altered microbial activity,and limited nutrient supplies could result in restricted litter decomposition.To clearly understand the effects of N and P regulation on decomposition,we need longer decomposition experiment durations,more intensive field and laboratory fertilization experiments,and simultaneously,microbe and enzyme dynamics in the decomposition process should be further investigated.关键词
凋落物分解/N/P/养分有效性/微生物/酶Key words
litter decomposition/N/P/nutrient availability/microbes/enzymes引用本文复制引用
林成芳,彭建勤,洪慧滨,杨智杰,杨玉盛..氮、磷养分有效性对森林凋落物分解的影响研究进展[J].生态学报,2017,37(1):54-62,9.基金项目
国家自然科学基金面上资助项目(31270584) （31270584）
国家自然科学基金重点资助项目(31130013) （31130013）
