Catchment agriculture and local environment affecting the soil denitrification potential and nitrous oxide production of riparian zones in the Han River Basin, China

doi:10.1016/j.agee.2015.10.002

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	Catchment agriculture and local environment affecting the soil denitrification potential and nitrous oxide production of riparian zones in the Han River Basin, China
	Liu, Wenzhi 1; Xiong, Ziqian 1,2; Liu, Hui 3,4; Zhang, Quanfa 1,2; Liu, Guihua 1
刊名	AGRICULTURE ECOSYSTEMS & ENVIRONMENT
	2016-01-15
卷号	216 页码:147-154
关键词	Agricultural landscape Greenhouse gas Nitrogen cycles Potential denitrification Yangtze River Basin
ISSN号	0167-8809
DOI	10.1016/j.agee.2015.10.002
英文摘要	Riparian zones play an important role in reducing nitrogen (N) loading to rivers and streams primarily through soil denitrification which reduces nitrate (NO3-) to nitrous oxide (N2O) and dinitrogen (N-2) gases. Although the relationships between local environments and soil denitrification are well understood, relatively little is known about the indirect effects of landscape factors (e.g., catchment agriculture) on the soil denitrification of riparian zones. In this study, we used the acetylene block technique to measure the denitrification potential and net N2O production of soils collected from 62 riparian sites in 15 subtropical rivers of varying catchment land uses. The results indicated that, among the local factors studied, the soil moisture, organic matter and N-3(-) concentrations were positively associated with both the denitrification potential and N2O production rate. Agricultural riparian zones had a denitrification potential (2.81 +/- 1.01 ng N g(-1) h(-1)) significantly higher than forested riparian zones (0.66 +/- 0.24 ngN g(-1) h(-1)). Additionally, the riparian denitrification potential increased with the percentage of agriculture in the catchments (R = 0.53, P <0.05). Structural equation modeling revealed that the indirect effects of catchment agriculture on the riparian denitrification potential and N2O production rate were mediated primarily through soil N-3(-). Our findings suggest that, compared to forested riparian zones, agricultural riparian zones have greater potential to remove N from polluted runoff. The conversion of original vegetation to agricultural lands in catchments may have a profound impact on the soil N cycles and N-3(-) removal capacity of riparian zones. (C) 2015 Elsevier B.V. All rights reserved.
资助项目	National Science Foundation of China[31270583] ; Chinese Academy of Sciences[Y455435L04]
WOS研究方向	Agriculture ; Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000366074400016
内容类型	期刊论文
源URL	[http://202.127.146.157/handle/2RYDP1HH/132]
专题	中国科学院武汉植物园
通讯作者	Liu, Guihua
作者单位	1.Chinese Acad Sci, Wuhan Bot Garden, Key Lab Aquat Bot & Watershed Ecol, Wuhan 430074, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Minist Water Resources, Inst Hydroecol, Wuhan 430079, Peoples R China 4.Chinese Acad Sci, Wuhan 430079, Peoples R China
推荐引用方式 GB/T 7714	Liu, Wenzhi,Xiong, Ziqian,Liu, Hui,et al. Catchment agriculture and local environment affecting the soil denitrification potential and nitrous oxide production of riparian zones in the Han River Basin, China[J]. AGRICULTURE ECOSYSTEMS & ENVIRONMENT,2016,216:147-154.
APA	Liu, Wenzhi,Xiong, Ziqian,Liu, Hui,Zhang, Quanfa,&Liu, Guihua.(2016).Catchment agriculture and local environment affecting the soil denitrification potential and nitrous oxide production of riparian zones in the Han River Basin, China.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,216,147-154.
MLA	Liu, Wenzhi,et al."Catchment agriculture and local environment affecting the soil denitrification potential and nitrous oxide production of riparian zones in the Han River Basin, China".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 216(2016):147-154.