您好，欢迎访问甘肃省农业科学院 机构知识库！
甘肃省农业科学院机构知识库

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

Soil organic and inorganic carbon in the loess profiles of Lanzhou area: implications of deep soils

文献类型： 外文期刊

作者： Zhang, Fang 1 ; Wang, Xiujun 1 ; Guo, Tianwen 3 ; Zhang, Pingliang 3 ; Wang, Jiaping 4 ;

作者机构： 1.Beijing Normal Univ, Coll Global Change & Earth Syst Sci, Beijing 100875, Peoples R China

2.Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20740 USA

3.Gansu Acad Agr Sci, Lanzhou 730070, Gansu, Peoples R China

4.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Xinjiang, Peoples R China

关键词： Soil inorganic carbon;Soil organic carbon;Loess;Deep soil;Semi-arid region

期刊名称：CATENA （ 影响因子：5.198； 五年影响因子：5.594 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： Soil organic carbon (SOC) and inorganic carbon (SIC) are important carbon reservoirs in arid and semi-arid regions. Field data for quantifying both SOC and SIC in deep soils have been lacking. A study was carried out to evaluate soil carbon stocks in the loess of Lanzhou, a typical semiarid area of northwestern China. Soil samples were mainly collected from profiles of upper 2 meters in irrigated and non-irrigated agricultural land. Our data showed that SOC content decreased with depth, from 7.0 +/- 2.0 g kg(-1) in the 00.2 m to less than 3.0 +/- 2.0 g kg(-1) below 1 m. There was a large variation (311 g kg(-1)) in SOC of the topsoil (00.2 m) but a narrow range of 15 g kg(-1) below 1.0 m. Soil inorganic carbon content showed little vertical changes with mean value of 16.0 +/- 2.5 g kg(-1) in the 02 m, but a considerable spatial variation of 10 21 g kg(-1) in the topsoil. Irrigation slightly enhanced SIC stock in the whole soil profile, with 10% increase in the 030 cm. We estimated that SOC stock was approximately 10 kg C m(-2) for the 02 m, and the SIC stock was about four times of the SOC stock. The SOC and SIC stocks in the subsoil (12 m) were 40% and 50% of the stocks over the 02 m, respectively. The estimated total carbon stock was 26.8 kg C m(-2) over the 01 m, but 50.0 kg C m(-2) over the 02 m. Our study implies that neglecting deep soil may lead to underestimation of soil carbon stock by 50% in the loess. (C) 2014 Elsevier B.V. All rights reserved.

  • 相关文献

[1]Trends in grain yields and soil organic C in a long-term fertilization experiment in the China Loess Plateau. Xu, Minggang,Fan, Tinglu,Song, Shangyou,Fan, Tinglu,Zhou, Guangye,Ding, Linping.

[2]Influence of cultivation and fertilization on total organic carbon and carbon fractions in soils from the Loess Plateau of China. Wu, TY,Schoenau, JJ,Li, FM,Qian, PY,Malhi, SS,Shi, YC,Xu, FL. 2004

[3]Influence of tillage and rotation systems on distribution of organic carbon associated with particle-size fractions in Chernozemic soils of Saskatchewan, Canada. Wu, TY,Schoenau, JJ,Li, FM,Qian, PY,Malhi, SS,Shi, YC. 2006

作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：甘肃省农业科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台