不同恢复模式对退化高寒沼泽湿地土壤轻重组有机碳的影响  

Effects of Different Restoration Models on Soil Light and Heavy Fraction Organic Carbon in Degraded Alpine Marsh Wetland

作　　者：刘思泽 刘宏强 黄雪梅 王雪 杨靖宇 陈德朝[1] LIU Size;LIU Hongqiang;HUANG Xuemei;WANG Xue;YANG Jingyu;CHEN Dechao(Sichuan Key Laboratory of Ecological Restoration and Conservation for Forest and Wetland,Sichuan Academy of Forestry,Chengdu 610081,China;Tianfu Yongxing Laboratory,Chengdu 610213,China)

机构地区：[1]四川省林业科学研究院森林和湿地生态恢复与保育四川省重点实验室,四川成都610081 [2]天府永兴实验室,四川成都610213

出　　处：《四川林业科技》2023年第6期69-76,共8页Journal of Sichuan Forestry Science and Technology

基　　金：四川省省级科研院所基本科研业务费项目(2022JBKY05)。

摘　　要：以若尔盖县麦溪乡已实施多年水位提升和植被恢复工程的高寒沼泽湿地为研究对象,分别采集重度退化(HD)湿地、未退化(UD)湿地以及不同恢复模式下湿地各土层(0—20 cm、20—40 cm、40—60 cm、60—80 cm)土壤样品,分析土壤有机碳轻重组分的变化及其与土壤因子的关系。结果表明:不同恢复措施均能造成退化湿地土壤总有机碳含量在各土层之间的空间分异,但补播草种措施不能显著提升各土层总有机碳含量;恢复措施对退化湿地土壤中重组分有机碳和轻组分有机碳含量提升效果不显著。综合RDA分析来看,单一补播草种措施短期内不能根本改善湿地退化状况,水位提升措施能使土壤碳组分结构趋近于未退化湿地,土壤TN是影响土壤有机碳组分的最关键因子,可作为反映高寒沼泽湿地恢复的关键指标。The alpine marsh wetland in Maixi Township,Zoige County,which had been carrying out the water-level elevation and vegetation restoration projects for many years,were taken as the research object.Soil samples of different soil layers(0-20 cm,20-40 cm,40-60 cm,60-80 cm)were collected from the heavily degraded(HD)wetland,non�degraded(UD)wetland and wetlands under different restoration models,and the changes of soil organic carbon compositions and their relationships with soil factors were analyzed.The results showed that different restoration measures could cause significant differences in the total organic carbon contents of degraded wetlands soil among different soil layers,but the replanting-grass-seed measure could not significantly improve the total organic carbon content in each soil layer.The restoration measures had no significant effects on the contents of heavy fraction organic carbon and light fraction organic carbon in degraded wetland soil.Based on the comprehensive RDA analysis,the single replanting-grass-seed measure could not fundamentally improve the wetland degradation in a short period of time,and the water-level elevation measure could improve the soil carbon fractions close to the non-degraded wetland.Soil TN was the most critical factor affecting the soil organic carbon composition and can be used as a key indicator to reflect the recovery of alpine marsh wetland.

关 键 词：高寒沼泽湿地 恢复模式 土壤总有机碳 重组分有机碳 轻组分有机碳 

分 类 号：S153.6[农业科学—土壤学]