The changes in soil organic carbon stock and quality across a subalpine forest successional series

作     者：Fei Li Zhihui Wang Jianfeng Hou Xuqing Li Dan Wang Wanqin Yang Fei Li;Zhihui Wang;Jianfeng Hou;Xuqing Li;Dan Wang;Wanqin Yang

作者机构：Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and ConservationSchool of Life SciencesTaizhou UniversityTaizhou 318000China Linhai Station of Zhejiang Provincial Forest Ecological ResearchTaizhou UniversityTaizhou 318000China Taizhou Key Laboratory of Mountain Ecological Restoration and Special Industry CultivationTaizhou UniversityTaizhou 318000China Hawkesbury Institute for the EnvironmentWestern Sydney UniversityPenrithNew South WalesAustralia 

出 版 物：《Forest Ecosystems》 (森林生态系统（英文版）)

年 卷 期：2024年第11卷第4期

页      面：423-433页

核心收录：

学科分类：0907[农学-林学] 08[工学] 0829[工学-林业工程] 09[农学] 

基　　金：the financial support from the National Natural Science Foundation of China(Nos.32001139 32071554) 

主　　题：Forest successional series Soil organic cubon stock Molecular composition Humification indices Soil organic carbon quality 

摘      要：Soil organic carbon(SOC)affects the function of terrestrial ecosystem and plays a vital role in global carbon ***,large uncertainty still existed regarding the changes in SOC stock and quality with forest ***,the stock and quality of SOC at 1-m soil profile were investigated across a subalpine forest series,including shrub,deciduous broad-leaved forest,broadleaf-conifer mixed forest,middle-age coniferous forest and mature coniferous forest,which located at southeast of Tibetan *** results showed that SOC stock ranged from 9.8 to29.9 kg·m^(-2),and exhibited a hump-shaped response pattern across the forest successional *** highest and lowest SOC stock was observed in the mixed forest and shrub forest,*** SOC stock had no significant relationships with soil temperature and litter stock,but was positively correlated with wood debris ***,the average percentages of polysaccharides,lignins,aromatics and aliphatics based on FTIR spectroscopy were 79.89%,0.94%,18.87%and 0.29%,***,the percentage of polysaccharides exhibited an increasing pattern across the forest successional series except for the sudden decreasing in the mixed forest,while the proportions of lignins,aromatics and aliphatics exhibited a decreasing pattern across the forest successional series except for the sudden increasing in the mixed ***,the humification indices(HIs)were highest in the mixed forest compared to the other four successional stages,which means that the SOC quality in mixed forest was worse than other successional *** addition,the SOC stock,recalcitrant fractions and HIs decreased with increasing soil depth,while the polysaccharides exhibited an increasing *** findings demonstrate that the mixed forest had higher SOC stock and worse SOC quality than other successional *** high proportion of SOC stock(66%at depth of 20-100 cm)and better SOC quality(lower HIs)indicate that deep s