首页 | 本学科首页   官方微博 | 高级检索  
   检索      

不同退耕年限对菜子湖湿地表土有机碳组分与质量的影响
引用本文:汪青,张平究,孟向东.不同退耕年限对菜子湖湿地表土有机碳组分与质量的影响[J].生态学杂志,2012,31(8):2038-2043.
作者姓名:汪青  张平究  孟向东
作者单位:安徽自然灾害过程与防控研究省级重点实验室,安徽师范大学国土资源与旅游学院,安徽芜湖241003
基金项目:国家自然科学基金资助项目,安徽省高校优秀青年人才基金,安徽师范大学国土资源与旅游学院科研团队项目
摘    要:退耕还湿后土壤有机碳不同组分变化和有机碳质量的评价是退耕湿地生态恢复研究的重要内容。对安徽菜子湖湿地不同退耕年限(2、5、8、10和20a)的湿地土壤总有机碳(TOC)、颗粒态有机碳(POC)和矿物结合态有机碳(MOC)的含量与有机碳质量进行了研究。结果表明,随着退耕年限增加,土壤TOC、POC、MOC含量均有显著增加,且退耕后土壤有机碳增加过程中,以POC为代表的活性有机碳优先恢复,而以MOC为代表的稳定有机碳恢复相对滞后。随着退耕年限增加,POC/MOC、TOC和POC的层化比(SR)增加,反映有机碳的活性明显提高。退耕期间所增加的有机碳在组成上以易降解的POC为主,在分布上以易降解的表层有机碳居多,因此有机碳库的稳定性并未明显提高。通过计算碳库管理指数(CPMI),发现土壤质量随着退耕年数增加而提高,根据CPMI变化趋势线,土壤质量大约需要13a才能恢复到对照水平;退耕湿地生态恢复过程中,有机碳数量(碳库指数CPI)恢复较快,而有机碳质量(碳库活度指数AI)恢复需要较长的时间,二者分别需7.6和22.7a恢复到对照水平。

关 键 词:颗粒态有机碳  矿物结合态有机碳  有机碳质量  层化比  碳库管理指数

Changes of surface soil organic carbon components and its quality in the wetlands with different duration of recovery from farmlands in Caizi Lake of Anhui Province, East China
WANG Qing , ZHANG Ping-jiu , MENG Xiang-dong.Changes of surface soil organic carbon components and its quality in the wetlands with different duration of recovery from farmlands in Caizi Lake of Anhui Province, East China[J].Chinese Journal of Ecology,2012,31(8):2038-2043.
Authors:WANG Qing  ZHANG Ping-jiu  MENG Xiang-dong
Institution:(Anhui Key Laboratory of Natural Disasters Process and Prevention, College of Territorial Resource and Tourism, Anhui Normal University, Wuhu 241003, Anhui, China).
Abstract:To assess the changes of soil organic carbon components and its quality in the wetlands recovered from farmlands is of importance in the study of wetland ecological restoration. In this paper, surface soil samples were collected from the wetlands having been recovered from farmlands for different durations (2, 5, 8, 10, and 20 years) in the Caizi Lake of Anhui, with the total organic carbon (TOC), particulate organic carbon (POC), and mineral-bound organic carbon (MOC) concentrations and the organic carbon quality studied. The TOC, POC, and MOC concentrations all increased significantly with recovery duration, and the increase of active organic carbon exemplified by POC took the priority while that of stable organic carbon exemplified by MOC was relatively lagged behind. With increasing recovery duration, the POC/MOC and the stratification ratio (SR) of TOC and POC increased, reflecting the obvious enhancement of organic carbon activity. The increased organic carbon during the recovery duration was mainly the labile POC which was easily degradable, and thus, having less contribution to the stability of surface soil organic carbon pool. The carbon pool management index (CPMI) analysis showed that the soil quality increased with the recovery duration, and it would take 13 years to recover the soil quality to original level. In the ecological restoration of the wetland recovered from farmland, the soil organic carbon content (carbon pool index, CPI) recovered more quickly, while the soil organic carbon quality (carbon pool activity index, AI) recovered more slowly, which would take 7.6 and 22.7 years, respectively.
Keywords:particulate organic carbon  mineral-bound organic carbon  organic carbon quality  stratification ratio  carbon pool management index
本文献已被 CNKI 万方数据 等数据库收录!
点击此处可从《生态学杂志》浏览原始摘要信息
点击此处可从《生态学杂志》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号