水土保持学报2025，Vol.39Issue(5)：24-32,9.DOI:10.13870/j.cnki.stbcxb.2025.05.020
苏打盐碱退化湿地淹水恢复对植物-土壤系统有机碳储量的影响
Effects of Flooding Restoration on Organic Carbon Storage in Plant-Soil System of Degraded Soda Saline-Alkali Wetlands
摘要
Abstract
[Objective]This study aims to investigate the variation patterns of organic carbon storage in the plant-soil system following flooding restoration of degraded soda saline-alkali wetlands.[Methods]Typical long-term degraded marsh wetlands(alkali patches,Leymus chinensis grasslands)and Phragmites australis marshlands restored by flooding in the western Songnen Plain were selected as study sites.The aboveground and belowground vegetation biomass and physicochemical properties of the 1-meter soil profiles were measured to analyze the variation patterns of soil organic carbon(SOC)content and storage,along with their influencing factors,during the restoration of degraded saline-alkali wetlands.[Results]After restoration,the vegetation biomass and carbon pool of Phragmites australis marshlands reached 7 807.78 g/m2 and 1.90 kg/m2,showing increases of 383.15%and 216.67%,respectively,compared with Leymus chinensis grasslands.The vegetation biomass and carbon pool of alkali patches were both zero.Flooding restoration promoted increases in both vegetation biomass and carbon storage.The SOC storage in the 1-meter soil profile of restored Phragmites australis marshlands reached 17.38 kg/m2,exceeding that of alkali patches and Leymus chinensis grasslands by 64.12%and 4.45%,respectively,with deeper layers exhibiting higher SOC than surface soils.Flooding restoration increased the SOC storage.SOC content and storage were significantly positively correlated with soil moisture(p<0.05),and negatively correlated with total nitrogen,total phosphorus,electrical conductivity,and the nitrogen-to-phosphorus ratio(p<0.05).Significant differences in soil physicochemical properties were observed among alkali patches,Leymus chinensis grasslands,and Phragmites australis marshlands(p<0.05),and improvements in the soil environment during restoration facilitated SOC accumulation.[Conclusion]Flooding restoration of degraded soda saline-alkaline wetlands help enhance carbon sink capacity of the plant-soil system.关键词
苏打盐碱湿地/退化/淹水恢复/土壤有机碳Key words
soda saline-alkali wetland/degradation/flooding restoration/soil organic carbon分类
农业科技引用本文复制引用
冯伟辉,文波龙,孙晓新,罗那那,杨静..苏打盐碱退化湿地淹水恢复对植物-土壤系统有机碳储量的影响[J].水土保持学报,2025,39(5):24-32,9.基金项目
吉林省重大科技专项(20240203004NC,20230303005SF) （20240203004NC,20230303005SF）
国家自然科学基金项目(41971140) （41971140）
中国科学院战略性先导科技专项(A类)(XDA28110400) （A类）
