干旱区生态环境知识资源中心(Arid): Effects of grazing on net primary productivity,evapotranspiration and water use efficiency in the grasslands of Xinjiang,China

Arid

	Effects of grazing on net primary productivity,evapotranspiration and water use efficiency in the grasslands of Xinjiang,China
	Huang Xiaotao; Luo Geping; Ye Feipeng; Han Qifei
来源期刊	Journal of Arid Land
ISSN	1674-6767
出版年	2018
卷号	10 期号:4 页码:588-600
英文摘要	Grazing is a main human activity in the grasslands of Xinjiang,China.It is vital to identify the effects of grazing on the sustainable utilization of local grasslands.However,the effects of grazing on net primary productivity(NPP),evapotranspiration(ET) and water use efficiency(WUE) in this region remain unclear.Using the spatial Biome-BGC grazing model,we explored the effects of grazing on NPP,ET and WUE across the different regions and grassland types in Xinjiang during 1979-2012.NPP,ET and WUE under the grazed scenario were generally lower than those under the ungrazed scenario,and the differences showed increasing trends over time.The decreases in NPP,ET and WUE varied significantly among the regions and grassland types.NPP decreased as follows:among the regions,Northern Xinjiang(16.60 g C/(m~2·a)),Tianshan Mountains(15.94 g C/(m~2·a)) and Southern Xinjiang(-3.54 g C/(m~2·a));and among the grassland types,typical grasslands(25.70 g C/(m~2·a)),swamp meadows(25.26 g C/(m~2·a)),mid-mountain meadows(23.39 g C/(m~2·a)),alpine meadows(6.33 g C/(m~2·a)),desert grasslands(5.82 g C/(m~2·a)) and saline meadows(2.90 g C/(m~2·a)).ET decreased as follows:among the regions,Tianshan Mountains(28.95 mm/a),Northern Xinjiang(8.11 mm/a) and Southern Xinjiang(7.57 mm/a);and among the grassland types,mid-mountain meadows(29.30 mm/a),swamp meadows(25.07 mm/a),typical grasslands(24.56 mm/a),alpine meadows(20.69 mm/a),desert grasslands(11.06 mm/a) and saline meadows(3.44 mm/a).WUE decreased as follows:among the regions,Northern Xinjiang(0.053 g C/kg H_2O),Tianshan Mountains(0.034 g C/kg H_2O) and Southern Xinjiang(0.012 g C/kg H_2O);and among the grassland types,typical grasslands(0.0609 g C/kg H_2O),swamp meadows(0.0548 g C/kg H_2O),mid-mountain meadows(0.0501 g C/kg H_2O),desert grasslands(0.0172 g C/kg H_2O),alpine meadows(0.0121 g C/kg H_2O) and saline meadows(0.0067 g C/kg H_2O).In general,the decreases in NPP and WUE were more significant in the regions with relatively high levels of vegetation growth because of the high grazing intensity in these regions.The decreases in ET were significant in mountainous areas due to the terrain and high grazing intensity.
英文关键词	grazing effect grassland type net primary productivity evapotranspiration water use efficiency Biome-BGC grazing model
类型	Article
语种	英语
开放获取类型	Bronze
收录类别	CSCD
WOS研究方向	Agriculture
CSCD记录号	CSCD:6283200
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335980
作者单位	Huang Xiaotao, Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences;;University of Chinese Academy of Sciences, State Key Laboratory of Desert and Oasis Ecology;;, Urumqi;;, ;;Beijing 830011;;100049.; Luo Geping, Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences, State Key Laboratory of Desert and Oasis Ecology, Urumqi, Xinjiang 830011, China.; Ye Feipeng, College of Resource and Environment Sciences,Xinjiang University, Urumqi, Xinjiang 830046, China.; Han Qifei, Nanjing University of Information Science & Technology, Nanjing, Jiangsu 210044, China.
推荐引用方式 GB/T 7714	Huang Xiaotao,Luo Geping,Ye Feipeng,et al. Effects of grazing on net primary productivity,evapotranspiration and water use efficiency in the grasslands of Xinjiang,China[J],2018,10(4):588-600.
APA	Huang Xiaotao,Luo Geping,Ye Feipeng,&Han Qifei.(2018).Effects of grazing on net primary productivity,evapotranspiration and water use efficiency in the grasslands of Xinjiang,China.Journal of Arid Land,10(4),588-600.
MLA	Huang Xiaotao,et al."Effects of grazing on net primary productivity,evapotranspiration and water use efficiency in the grasslands of Xinjiang,China".Journal of Arid Land 10.4(2018):588-600.