生态学报2018，Vol.38Issue(6)：2170-2179,10.DOI:10.5846/stxb201703180458
典型喀斯特峰丛洼地不同植被恢复对土壤养分含量和微生物多样性的影响
Dynamics of soil nutrient content and microbial diversity following vegetation restoration in a typical karst peak-cluster depression landscape
摘要
Abstract
Understanding the dynamics of soil nutrients and microbial diversity following vegetation restoration is fundamentally important for promoting the recovery of soil ecological function and revegetation in degraded karst ecosystems of Southwest China.Here,the study selected four vegetation types which represent four stages of vegetation restoration in a typical karst peak-cluster depression in Mulun natural reservein northwest Guangxi,i.e.,grassland,shrubland,secondary forest and primary forest,and investigated soil pH,nutrient content,and the diversity of microorganisms in non-rhizosphere and rhizosphere soil around the dominant species.Significant differences in soil nutrients were observed between rhizosphere and non-rhizosphere at the four vegetation restoration stages.Soil available nutrients respond more sensitively to subtle changes in the rhizosphere than total nutrients.There was an enrichment effect for most soil nutrients.In addition,a dramatically higher accumulation rate was observed for available phosphorous (AP) and available potassium (AK) at primary forest,as compared to other three stages.Both the Shannon-Wiener index (H) and the richness index (S) for bacteria were higher than those for fungi,and the Shannon-Wiener index (H),the richness index (S),and the Pielou evenness index (EH) of bacteria and fungi in the rhizosphere were also higher than those in the non-rhizosphere.Soil total nitrogen (TN) was strongly correlated with pH value,soil organic carbon (SOC),and available nitrogen (AN) (P＜ 0.01),and phosphorous and potassium correlated positively with the diversity of soil microorganisms.关键词
土壤养分/微生物多样性/根际/植被恢复/喀斯特峰丛洼地Key words
soil nutrients/microbial diversity/rhizoshpere/vegetation restoration/karst peak-cluster depression引用本文复制引用
胡芳,杜虎,曾馥平,宋同清,彭晚霞,张芳..典型喀斯特峰丛洼地不同植被恢复对土壤养分含量和微生物多样性的影响[J].生态学报,2018,38(6):2170-2179,10.基金项目
国家重点研发计划(2016YFC0502405) （2016YFC0502405）
国家自然科学基金项目(31400412,31370485,31370623) （31400412,31370485,31370623）
广西重点研发计划(桂科AB16380255,桂科AB17129009) （桂科AB16380255,桂科AB17129009）
广西科技惠民项目(桂科转1599001-6) （桂科转1599001-6）
广西特聘专家项目 （）
