农业现代化研究2025，Vol.46Issue(2)：388-396,9.DOI:10.13872/j.1000-0275.2024.1657
植被演替过程的土壤呼吸动态变化及其驱动因子研究
Dynamics of soil respiration and its driving factors in vegetation succession
摘要
Abstract
Soil respiration is a major component of ecosystem carbon flux and plays a crucial role in the global carbon balance.Understanding the changes in soil respiration and its controlling factors is essential for comprehending the variations in ecosystem carbon flux during succession and its contribution to the global greenhouse effect.This study was conducted in the karst mountain region of Southwest China,where we selected six different types of ecosystems:abandoned farmland(AG),grassland-shrubland(GS),shrubland(SH),15-year-old secondary forest(F15),25-year-old secondary forest(F25),and 50-year-old secondary forest(F50).The annual soil respiration flux was measured using the static chamber method.The results showed a significant decline in soil respiration as the succession progressed,with annual carbon fluxes of 602±59,584±11,634±57,416±49,428±41,and 364±31 g/(m2·a),respectively.Soil respiration rate was significantly positively correlated with soil temperature(P<0.01)and significantly negatively correlated with soil moisture,soil organic carbon(SOC),total nitrogen,microbial biomass carbon,easily oxidized organic carbon,and exchangeable calcium and magnesium.The findings suggest that soil temperature and moisture are the primary factors influencing soil respiration across different stages of ecosystem succession.This study provides valuable data for further research into the mechanisms driving soil respiration changes in restored ecosystems and contributes to predicting carbon flux variations during succession.关键词
西南喀斯特/植被演替/土壤呼吸/温度/湿度Key words
karst in southwest/vegetation succession/soil respiration/temperature/soil moisture分类
农业科技引用本文复制引用
郑亮,罗焱霞,陈浩,肖孔操,段鹏鹏..植被演替过程的土壤呼吸动态变化及其驱动因子研究[J].农业现代化研究,2025,46(2):388-396,9.基金项目
国家自然科学基金区域创新发展联合基金项目(U21A20189),湖南省自然科学基金项目(2022JJ50032).Supported by the Regional Innovation Development Joint Fund Project of National Natural-Science Foundation of China(U21A20189) （U21A20189）
Natural Science Foundation of Hunan Province. （）
