四川环境2025，Vol.44Issue(1)：34-40,7.DOI:10.14034/j.cnki.schj.2025.01.005
水位和放牧对若尔盖沼泽湿地土壤有机碳的影响
Effects of Water Level and Grazing on Soil Organic Carbon on Zoige Wetland
摘要
Abstract
The carbon cycle of Zoige wetland plays an important role in the global carbon cycle,but the changes of water level and grazing seriously affect the soil organic carbon in Zoige swamp wetland.Through field sampling analysis on three different flooding and gazing types in Zoige area,changes of soil organic carbon(SOC)under different degradation conditions of marsh wetlands in Zoige area were evaluated.The results showed that compared with the natural marsh wetlands without gazing and with long-term flooding,the organic carbon content of soil(0～10 cm)in the seasonal flooded wet meadow where the long-term grazing prohibition is implemented increased from 168.9±13.1 g/kg to 226.8±6.0 g/kg.Soil organic carbon density(0～50 cm)increased from 31.3±2.4 kg/m2 to 37.9±1.5 kg/m2.In marsh wetlands with long-term flooding,a slight drop in water level will promote the accumulation of soil organic carbon.However,with the further decline of water level,soil organic carbon content will decrease significantly.Under the condition of long-term grazing prohibition,the organic carbon content of soil(0～10 cm)in dry meadow was reduced by 64％compared with that in wet meadow with long-term grazing prohibition,and soil organic carbon density(0～50 cm)decreased by 32％.Grazing will further increase the loss of soil organic carbon.关键词
若尔盖沼泽湿地/土壤有机碳/水位变化/放牧/土壤有机碳密度Key words
Zoige wetland/soil organic carbon/water level change/grazing/density of soil organic carbon分类
环境科学引用本文复制引用
马婵华,徐争强..水位和放牧对若尔盖沼泽湿地土壤有机碳的影响[J].四川环境,2025,44(1):34-40,7.基金项目
四川省地质调查研究院2023年度财政科研项目"基于大数据和专家知识的川西北高原湿地生态系统碳储监测研究"(51000023Y000008287188) （51000023Y000008287188）
四川省地质调查研究院2024年度财政科研项目"若尔盖山水工程示范项目生态修复碳汇计量及其价值实现路径研究"(SCIGS-CZDXM-2024011). （SCIGS-CZDXM-2024011）
