| 汉江上游郧县段黄土-古土壤序列风化成壤特征以及成壤环境演变 |
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| 引用本文： | 卢越,查小春,黄春长,庞奖励,刘建芳,张玉柱.汉江上游郧县段黄土-古土壤序列风化成壤特征以及成壤环境演变[J].中国沙漠,2014,34(4):992-997. |
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| 作者姓名： | 卢越 查小春 黄春长 庞奖励 刘建芳 张玉柱 |
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| 作者单位： | 陕西师范大学 旅游与环境学院, 陕西 西安 710062 |
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| 基金项目： | 国家自然科学基金重点项目(41030637,41271108);国家社会科学基金重点项目(11AZS009);教育部博士点基金优先发展领域项目(20110202130002);中央高校基本科研业务费专项资金项目(GK201301003)资助 |
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| 摘 要： | 对汉江上游进行野外实地详细调查,在湖北省郧县尚家河台地前沿发现了典型的全新世黄土-古土壤沉积剖面,通过粒度、磁化率、吸湿水和烧失量分析表明,黏粒、细粉砂、磁化率、吸湿水和烧失量在古土壤层S0出现高值,在L1、Lt、L0为低值;而粗粉砂、细砂粒和粗砂粒在S0为低值,在L1、Lt、L0为高值。这些指标的变化说明了全新世以来的气候和成壤环境的变化特征,即在古土壤S0形成时期,气候温暖湿润,成壤作用非常强烈;黄土堆积时期气候相对干旱,成壤作用较弱。
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| 关 键 词： | 黄土 古土壤 风化成壤作用 全新世 汉江上游 |
| 收稿时间： | 2013-07-10; |
Pedogenensis Characteristics and Pedogenic Environmental Change of Loess-palaeosol Sequences at Yun County in the Upper Reaches of the Hanjiang River |
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| Lu Yue,Zha Xiaochun,Huang Chunchang,Pang Jiangli,Liu Jianfang,Zhang Yuzhu.Pedogenensis Characteristics and Pedogenic Environmental Change of Loess-palaeosol Sequences at Yun County in the Upper Reaches of the Hanjiang River[J].Journal of Desert Research,2014,34(4):992-997. |
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| Authors: | Lu Yue Zha Xiaochun Huang Chunchang Pang Jiangli Liu Jianfang Zhang Yuzhu |
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| Institution: | College of Tourism and Environmental Sciences, Shaanxi Normal University, Xi'an 710062, China |
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| Abstract: | Through investigation in the upper reaches of Hanjiang River, a Holocene loess-palaeosol profile was identified in Yunxian county of Hubei province. Comparing with the curves of particle-size distribution, magnetic susceptibility, hygroscopic water and loss on ignition, the results showed that the content of clay, magnetic susceptibility, hygroscopic water and loss on ignition varied regularly in the Holocene loess-palaeosol profile, the content of these oxides reached the highest in S0, and the lowest in the loess, including L0, Lt and L1. However, coarse silt and sand reached the lowest in S0, and the highest in the loess. The change of the indexes showed the climatic and pedogenic environmental changed since the Holocene. The study results indicated that the climate was warm and the pedogenesis was stronger in the period of the palaeosol formation. In the stage of the loess accumulation, the climate was cold and arid, so the weathering pedogenesis was very weak. |
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| Keywords: | loess palaeosol pedogenesis Holocene upper reaches of Hanjiang River |
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