| 塔里木盆地荒漠植物与表土碳同位素组成研究 |
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| 引用本文： | 马剑英,陈发虎,夏敦胜,张慧文.塔里木盆地荒漠植物与表土碳同位素组成研究[J].冰川冻土,2007,29(1):144-148. |
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| 作者姓名： | 马剑英 陈发虎 夏敦胜 张慧文 |
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| 作者单位： | 1. 中国科学院, 寒区旱区环境与工程研究所, 沙漠与沙漠化重点实验室, 甘肃, 兰州, 730000;2. 兰州大学, 西部环境教育部重点实验室, 甘肃, 兰州, 730000 |
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| 基金项目： | 国家自然科学基金
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中国博士后科学基金
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科技部国际合作项目 |
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| 摘 要： | 表土有机质碳同位素组成(δ13Corg)反映了来自于地表各种植物δ13Corg的一个混合信息.要从沉积物δ13Corg中提取可靠的植被信息,需要系统研究现代表土有机质δ13Corg与地表植被δ13Corg的差异.初步研究了塔里木盆地主要现代植被及土壤碳同位素组成,对比不同地区土壤和地表植被δ13Corg的差异.结果表明:塔里木盆地柽柳属种群中植物与表土碳同位素组成之间存在显著相关关系,说明在干旱地区土壤中微生物和水生生物等的干扰因素可以忽略,其现代土壤的同位素组成只与地表相应的主要植被类型有关.塔里木盆地柽柳属种群中表土有机质δ13Corg值比地表植被δ13Corg值平均偏正1.71‰左右,不同于其它地区表土和地表植被δ13Corg差异(2.2‰,1‰,0.5‰)的结果,反映不同地区表土和地表植被有机质δ13Corg值差异不同.在利用沉积物δ13Corg值提取古生态植被信息时,应考虑到不同地区土壤有机质与地表植被δ13Corg值的不同差异会影响植被中C3、C4植物组成情况.
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| 关 键 词： | 碳同位素组成 植物 表土 塔里木盆地 |
| 文章编号： | 1000-0240(2007)01-0144-05 |
| 收稿时间： | 2006-07-07 |
| 修稿时间： | 07 7 2006 12:00AM |
Stable Carbon Isotope Compositions of Desert Plant and Surface Soil in the Tarim Basin |
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| MA Jian-ying,CHEN Fa-hu,XIA Dun-sheng,ZHANG Hui-wen.Stable Carbon Isotope Compositions of Desert Plant and Surface Soil in the Tarim Basin[J].Journal of Glaciology and Geocryology,2007,29(1):144-148. |
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| Authors: | MA Jian-ying CHEN Fa-hu XIA Dun-sheng ZHANG Hui-wen |
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| Affiliation: | 1. Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou Gansu 730000, China;2. Key Laboratory of Western China’s Environmental Systems(Ministry of Education), Lanzhou University, Lanzhou Gansu 730000, China |
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| Abstract: | The stable carbon isotope compositions in surface soil organic matter(δ13Corg) are medley information mainly from the standing terrestrial plants.In order to obtain the valuable vegetation information from δ13Corg in terrestrial sediment,it is necessary to investigate the relationship between δ13Corg value in modern surface soil organic matter and standing vegetation.In this paper a primary survey on the δ13Corg composition in modern surface soil organic matter and standing vegetation in the Tarim Basin is presented,and compared the δ13Corg discrepancy between modern surface soil organic matter and standing vegetation among different regions.The results showed that the δ13Corg values of plant in Tamarix L.populations are positively correlated with that of surface soil in the Tarim Basin,indicating that the interfering factors of microorganism and hydrophyte could be ignored in the arid regions.The δ13Corg values of modern surface soil organic are greater than that of standing vegetation,and the discrepancy of mean δ13Corg values between them is about 1.71‰ in the Tarim Basin.The discrepancies of δ13Corg values between surface soil organic matter and standing vegetation are different from region to region(2.2‰,1‰,0.5‰).It should be considered that the discrepancies of δ13Corg values between surface soil organic matter and standing vegetation among different regions could influence the C3/C4 vegetation compositions,when the paleovegetation information from δ13Corg in terrestrial sediment is obtained. |
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| Keywords: | stable carbon isotope composition plant surface soil Tarim Basin |
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