福建师范大学学报（自然科学版）2024，Vol.40Issue(4)：11-19,9.DOI:10.12046/j.issn.1000-5277.2024.04.002
雪被去除对亚高山森林"凋落物-土壤"剖面有机碳周转模式的影响
Effects of Snow Removal on the Organic Carbon Turnover Pattern of"Litter-Soil"Profile in a Subalpine Forest
摘要
Abstract
Climate change has led to intense alterations in winter snow cover,potentially cau-sing differentiation in the carbon turnover process of the"litter-soil"continuum along the soil pro-file.This study conducts in-situ simulation experiments in a subalpine forest of western Sichuan with snow removal treatment,monitoring and periodically sampling the organic and inorganic carbon con-tent of different soil layers to explore the regulatory mechanisms of soil carbon turnover in response to snow removal.The results indicate that snow removal exacerbates soil freeze-thaw cycles,with in-tense freezing events promoting the accumulation and carbon availability of organic carbon in litter and organic soil layers,while having insignificant effects on the mineral soil layer.Soil respiration is significantly reduced by the removal of snow cover.In the"litter-soil"continuum,snow removal increases the connectivity between various organic carbons in the mineral soil layer and the litter lay-er but diminishes the significance of the connectivity between organic carbons in the mineral soil lay-er and the organic soil layer.The loss of snow cover and intensified freeze-thaw events have a short-term positive effect on the accumulation of soil organic carbon in the subalpine forest ecosystem of western Sichuan.关键词
雪被去除/冻融/土壤碳/凋落物/亚高山森林Key words
snow cover removal/freeze-thaw/soil carbon/litter/sub-alpine forest分类
农业科技引用本文复制引用
杨帆,曾欣,谭波,李晗,李军..雪被去除对亚高山森林"凋落物-土壤"剖面有机碳周转模式的影响[J].福建师范大学学报（自然科学版）,2024,40(4):11-19,9.基金项目
国家自然科学基金面上项目(31870602) （31870602）
贵州省教育厅自然科学青年科技人才成长项目(黔教技[2024]227号) （黔教技[2024]227号）
贵州省教育厅高校科技创新团队项目(黔教技[2023]091) （黔教技[2023]091）
凯里学院博士专项(BS20240202) （BS20240202）
青年科学基金项目(31901295) （31901295）
