Tillage impacts on the fractions and compositions of soil organic carbon

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 城市与区域生态国家重点实验室

	Tillage impacts on the fractions and compositions of soil organic carbon
	Zhao, Hong ; Lv, Yizhong ; Wang, Xiaoke ; Zhang, Hailin ; Yang, Xueming
刊名	Agriculture
	2012
卷号	189 页码:397-403
关键词	Black soil Carbon associated with aggregates CPMAS C-13 NMR Functional group
ISSN号	0016-7061
中文摘要	This study aimed to reveal the impacts of tillage systems on the fractions (active, slow, and passive carbon) and chemical compositions of soil organic carbon (SOC). A long-term (26 years) tillage experiment in northeast China examined no-tillage (NT), plowing tillage (PT) and deep loosing (DL). The soil samples (from a depth of 0-20 cm) were wet-sieved into five aggregate classes (1000-2000 mu m, 500-1000 mu m, 250-500 mu m, 50-250 mu m, and <50 mu m). The active carbon (C) and passive C were detected in the 500-1000 mu m, 250-500 mu m, and 50-250 mu m aggregates, and the chemical compositions of SOC in micro-aggregates (<250 mu m) and macro-aggregates (>250 mu m) were assessed by CPMAS C-13 NMR. Macro-aggregates contained more SOC concentration than micro-aggregates. However, PT resulted in a greater SOC concentration in 50-500 mu m aggregates. NT and DL increased the active C and decreased the slow C in 500-1000 mu m aggregates, whereas PT showed the inverse. The C-13 NMR spectrum demonstrated that NT increased alkyl-C content, PT obtained a higher carbonyl-C concentration, and DL gained a greater O-alkyl-C concentration. Moreover, evaluating the impacts of tillage systems on the complexity revealed that the most complicated structure was presented in NT, the least in PT, whereas DL had an intermediate effect. Active C contains C2-C6 carbohydrate and anomeric C (Cl) polysaccharides, slow c consists of aldehyde-C, ketonic-C and quinone-C, and the passive C is enriched in aromatic-C. In conclusion, long-term tillage systems significantly affected the fractions and compositions of SOC. with NT stabilizing the SOC. (C) 2012 Elsevier B.V All rights reserved.
WOS记录号	WOS:000311875900046
公开日期	2014-11-26
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/8002]
专题	生态环境研究中心_城市与区域生态国家重点实验室
推荐引用方式 GB/T 7714	Zhao, Hong,Lv, Yizhong,Wang, Xiaoke,et al. Tillage impacts on the fractions and compositions of soil organic carbon[J]. Agriculture,2012,189:397-403.
APA	Zhao, Hong,Lv, Yizhong,Wang, Xiaoke,Zhang, Hailin,&Yang, Xueming.(2012).Tillage impacts on the fractions and compositions of soil organic carbon.Agriculture,189,397-403.
MLA	Zhao, Hong,et al."Tillage impacts on the fractions and compositions of soil organic carbon".Agriculture 189(2012):397-403.