水土保持学报2013，Vol.27Issue(2)：218-221,227,5.
农业活动对表层岩溶泉溶解无机碳及稳定碳同位素的影响
Influence of Agricultural Activities on Dissolved Inorganic Carbon and Stable Isotopic of Epikarst Springs
摘要
Abstract
In this study, groundwater samples were collected from three epikarst springs, with same climatic and geological condition, but different agricultural activities. Impact of agriculture activities on karst process was explored by DIC and δ13CDIC values. The results showed that: Baishuwan spring which was not affected by agricultural activities had the highest DIC concentration332. 45 mg/L). The DIC concentration(235. 13 mg/L) of Lanhuagou spring was slightly lower, which was affected by agriculture activities. And Hougou spring had the lowest DIC concentration(203. 52 mg/L), owing to the most intense agriculture activities. Meanwhile, the δ13 CDIC value had an opposite trend with the intensity of agricultural activities: Baishuwan ( — 9. 84‰)<Lanhuagou(—8. 06‰) <Hougou( —5. 72‰). Further more, the relationship between DIC and δ13CDIC values of the three springs showed that agricultural activities could also affect the correlation between DIC and δ13 CDIC, which was better under non-anthropogenic condition (Baishuwan), and became faintness with the increase of agricultural activities intensity (Lanhuagou) , while no barely correlation was found at Hougou spring with the most intense agriculture activities. In summary, agricultural activities were not conducive to karst carbon sink. Suffering the threat of global warming, to increase the carbon sink, karst area should be returned farmland to forest, in order to maintain a good ecological environment.关键词
农业活动/岩溶作用/DIC浓度/δ13CDICKey words
agricultural activities/ karstfication/ DIC concentration/ δ13CDIC分类
天文与地球科学引用本文复制引用
张笑微,周小萍,徐尚全,王鹏..农业活动对表层岩溶泉溶解无机碳及稳定碳同位素的影响[J].水土保持学报,2013,27(2):218-221,227,5.基金项目
国家自然科学基金项目(41072192,41103068) （41072192,41103068）
重庆市科委院士专项(CSTS,2010BC7004) （CSTS,2010BC7004）
中国地质调查局项目(1212011087119) （1212011087119）
重庆市国土房管局科技项目 （）
西南大学博士基金项目(SWU111009) （SWU111009）
