Knowledge Management System Of Institute of Earth Environment, CAS
The significant role of inorganic matters in preservation and stability of soil organic carbon in the Baoji and Luochuan loess/paleosol profiles, Central China | |
Wang, C (Wang, Chao)[ 1 ]; Li, FC (Li, Fuchun)[ 1 ]; Shi, HZ (Shi, Huanzhi)[ 1 ]; Jin, ZD (Jin, Zhangdong)[ 2 ]; Sun, XH (Sun, Xuhui)[ 1 ]; Zhang, F (Zhang, Fei)[ 2 ]; Wu, F (Wu, Feng)[ 2 ]; Kan, S (Kan, Shang)[ 1 ] | |
2013-10-30 | |
发表期刊 | CATENA |
卷号 | 109页码:186-194 |
文章类型 | 期刊论文 |
摘要 | The preservation and stability mechanisms of soil organic carbon (SOC) are the important factors to evaluate the capacity of soil carbon pool and the potential of sustainable utilization. To understand the preservation time and mechanisms of SOC under burial conditions, in the present study, the distributions of total organic carbon (TOC) and stable organic carbon (StOC), and their correlations with the contents of clays and clay minerals and different forms of iron oxides were investigated in the Baoji and Luochuan loess-paleosol profiles. Four facts were observed as the followings. (1) The labile SOC almost was decomposed and the mostly stable SOC was preserved in the loess and paleosol after 375 kyr since their formation. StOC could be preserved at least 762 kyr in both loess and paleosol under burial condition. (2) The TOC was positively correlated with clay contents, with correlation coefficients of 0.72 (Baoji) and 0.63 (Luochuan). (3) The TOC, StOC, mineral-protected organic carbon (MOC), and recalcitrant organic carbon (ROC) were positively correlated with kaolinite, with correlation coefficients of 0.93, 0.72, 0.52, 0.81 (Baoji) and 0.78, 0.58, 0.50, 0.49 (Luochuan), respectively, both with neither illite nor vermiculite. (4) The TOC was highly correlated with complex iron (Fe-p) with correlation coefficients of 0.90 (Baoji) and 0.82 (Luochuan), so with amorphous oxides of iron (Fe-o) as well. Among them, Fe-o mainly affected by sorption and Fe-p by complexation on SOC preservation, whereas kaolinite had both chemical and physical effects. The values of coefficients further highlight that the contributions of inorganic matters to the fixation of organic carbon were ranked to an order of kaolinite > Fe-p > Fe-o. |
关键词 | Soil Organic Carbon Kaolinite Iron Oxide Clay Particle Loess–paleosol Profile |
DOI | 10.1016/j.catena.2013.04.001 |
收录类别 | SCI |
语种 | 英语 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ieecas.cn/handle/361006/10001 |
专题 | 黄土与第四纪地质国家重点实验室(2010~) |
通讯作者 | Li, FC (Li, Fuchun)[ 1 ] |
作者单位 | 1.College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, Jiangsu, China; 2.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, Shaanxi 710075, China |
推荐引用方式 GB/T 7714 | Wang, C ,Li, FC ,Shi, HZ ,et al. The significant role of inorganic matters in preservation and stability of soil organic carbon in the Baoji and Luochuan loess/paleosol profiles, Central China[J]. CATENA,2013,109:186-194. |
APA | Wang, C .,Li, FC .,Shi, HZ .,Jin, ZD .,Sun, XH .,...&Kan, S .(2013).The significant role of inorganic matters in preservation and stability of soil organic carbon in the Baoji and Luochuan loess/paleosol profiles, Central China.CATENA,109,186-194. |
MLA | Wang, C ,et al."The significant role of inorganic matters in preservation and stability of soil organic carbon in the Baoji and Luochuan loess/paleosol profiles, Central China".CATENA 109(2013):186-194. |
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