热带亚热带植物学报2024，Vol.32Issue(3)：367-377,11.DOI:10.11926/jtsb.4766
天坑森林植物叶-凋落物-土壤C、N、P生态化学计量特征
Characteristics of Carbon,Nitrogen and Phosphorus Stoichiometry of Leaf,Litter and Soil in the Karst Tiankeng Forest
摘要
Abstract
In order to explore the nutrient cycling characteristics of C,N and P in Tiankeng forest communities in Dashiwei,Leye,Guangxi,the contents and stoichiometric ratios of C,N and P in plant leaf,litter and soil of forest communities inside and outside Tiankeng were compared,and their internal relationship and interaction were studied by using correlation analysis and redundancy analysis.The results showed that the leaf and litter of the forest inside Tiankeng showed a pattern of low C,low N and high P,and the soil was low C,low N and high P compared with the forests outside the Tiankeng.The C:N and C:P in leaf were significantly positively correlated with the C and N:P in litter,and C in leaf showed significantly negative correlation with P in soil.The N and N:P in leaf outside Tiankeng were significantly negative correlated with N:P in soil,and C:N in leaf was significantly positive correlated with C and C:N in soil,indicating that the C and P in litter inside Tiankeng forest might came from leaves,while C and N in leaf outside Tiankeng forests were mainly from soil.The explanation rates of soil C:N:P for the change of C:N:P of leaves and litter were 90.7%and 50.6%,respectively.The P had the highest explanation for the change of C:N:P of leaves and litter.Plants inside Tiankeng were more sensitive to the change of P content,while plants outside Tiankeng were more sensitive to the change of N content,which indicating that the forest inside Tiankeng might be the P-limited site,while the forest outside Tiankeng might be the N-limited site.The differences and associations of C:N:P in leaf-litter-soil of the forests inside and outside karst Tiankeng reflected the characteristics of nutrient cycling and the adaptation of plant community.关键词
碳氮磷生态化学计量/叶/凋落物/天坑森林/磷限制Key words
Ecological stoichiometry of C,N and P/Leaf/Litter/Tiankeng forest/Phosphorus limitation引用本文复制引用
黄贵,余林兰,刘昕宇,陈铭,薛跃规..天坑森林植物叶-凋落物-土壤C、N、P生态化学计量特征[J].热带亚热带植物学报,2024,32(3):367-377,11.基金项目
国家自然科学基金项目(31960047) （31960047）
珍稀濒危动植物生态与环境保护教育部重点实验室研究基金项目(ERESEP2019Z04)资助 This work was supported by the National Natural Science Foundation of China(Grant No.31960047),and the Project of Key Laboratory Research Foundation of Ecology of Rare and Endangered Species and Environmental Protection(Guangxi Normal University),Ministry of Education(Grant No.ERESEP2019Z04). （ERESEP2019Z04）
