Characteristics of dissolved organic carbon leaching from hillslope cropland of purple soil in the Sichuan Basin, China

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Characteristics of dissolved organic carbon leaching from hillslope cropland of purple soil in the Sichuan Basin, China
	Li, Taikui 1,2; Zhu, Bo1 ; Wang, Xiaoguo1 ; Kou, Changlin 2
刊名	JOURNAL OF FOOD AGRICULTURE & ENVIRONMENT
	2013
卷号	11 期号:2 页码:1522-1527
关键词	DOC interflow leaching flux sloping cropland precipitation
ISSN号	1459-0255
通讯作者	Li Taikui
中文摘要
英文摘要	Dissolved organic carbon (DOC) is an essential component of the carbon cycle from terrestrial to aquatic systems. Despite the large number of studies reporting on DOC losses from forest soils and in surface waters there is little published data on exports from sloping cropland. DOC leaching was studied in a hillslope cropland with slope gradient of 7% in the central Sichuan Basin, southwestern China during 2009-2010. The interflow was the major driving force of DOC leaching losses from the sloping cropland. DOC concentrations changed slightly during rainfall process and showed a positive correlation with interflow discharge velocity. Soil DOC content increased distinctly from sowing to stamen stage, and then decreased to the minimum at harvest in the maize grown season. This result responded with seasonal change of DOC concentrations of the interflow water. Annual loss flux of DOC through interflow ranged from 5.62 to 8.53, with an average of 7.08 kg ha(-1) yr(-1). DOC leaching flux through the interflow showed clear seasonal patterns with a flux of 4.11-7.81 kg ha(-1), about 73-91% of the annual total loss occurred in the stages from stamen to maturity of maize. This study clarifies the key mechanism and flux of DOC loss in hillslope cropland, and provides basic data for scientific evaluation of soil organic carbon cycle.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Food Science & Technology
研究领域[WOS]	Food Science & Technology
关键词[WOS]	MATTER ; FLUXES ; WATER ; TOPSOILS ; NITROGEN ; EXPORT
收录类别	SCI
语种	英语
WOS记录号	WOS:000323212800001
公开日期	2013-12-23
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/6687]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
作者单位	1.Chinese Acad Sci, Inst Mt Hazard & Environm, Chengdu 610041, Peoples R China 2.Henan Acad Agr Sci, Inst Plant Nutr Resources & Environm Sci, Zhengzhou 450002, Peoples R China
推荐引用方式 GB/T 7714	Li, Taikui,Zhu, Bo,Wang, Xiaoguo,et al. Characteristics of dissolved organic carbon leaching from hillslope cropland of purple soil in the Sichuan Basin, China[J]. JOURNAL OF FOOD AGRICULTURE & ENVIRONMENT,2013,11(2):1522-1527.
APA	Li, Taikui,Zhu, Bo,Wang, Xiaoguo,&Kou, Changlin.(2013).Characteristics of dissolved organic carbon leaching from hillslope cropland of purple soil in the Sichuan Basin, China.JOURNAL OF FOOD AGRICULTURE & ENVIRONMENT,11(2),1522-1527.
MLA	Li, Taikui,et al."Characteristics of dissolved organic carbon leaching from hillslope cropland of purple soil in the Sichuan Basin, China".JOURNAL OF FOOD AGRICULTURE & ENVIRONMENT 11.2(2013):1522-1527.