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 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

[3]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

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