农业环境科学学报2011，Vol.30Issue(11)：2336-2340,5.
呼伦湖沉积物有机碳的分布特征
Characteristics of Organic Carbon Distribution in the Sediment of Hulunhu Lake, China
摘要
Abstract
The total organic carbon(TOC) plays an important role in carbon cycles. TOC can be divided into light-fraction organic carbon (LFOC) and heavy-fraction organic carbon (HFOC) using the density fraetionation technique recently, LFOC consists of visible partly decomposed plant material at various stage of decomposition, includes spore, seed, animal and microbial debris and some soil minerals particle associated with plant debris. It is a good indicator for labile organic carbon. And H FOC consists of humus, existing as stable carbon pool. This study was carried out about the characteristics organic carbon distributions in the sediment of Hulunhu lake, which is the shallow lake in arid areas within the Mongolian Plateau. The results indicated that the content of TOC ranged from 9.18 to 61.68 g·kg-1, with the average of 34.64 g·kg-1; the content of HFOC ranged from 9.02 to 61.47 g·kg-1, with the average of 34.32 g·kg-1; and the content of LFOC ranged from 0.02 to 0.86 g·kg-1, with the average of 0.32 g·kg-1. The content of TOC showed a decreasing trend from northwest to southeast in spatial distribution. The mean C/N ratio of the sediment was 20.35 in the surface sediments of Hulunhu lake, Which meant that the source of organic matter was diverse.关键词
有机碳/分布/沉积物/湖泊Key words
organic carbon/distributions/ sediment/ lake分类
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宋文杰,何江,高际玫,吕昌伟,王维,樊明德,张家震..呼伦湖沉积物有机碳的分布特征[J].农业环境科学学报,2011,30(11):2336-2340,5.基金项目
国家自然科学基金(40863003) （40863003）
内蒙古自然科学基金 （）
内蒙古大学"科技创新团队"基金 （）
