Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.ecolmodel.2018.09.020 |
Grazing decreased water use efficiency in Central Asia from 1979 to 2011 | |
Han, Qifei1,2; Li, Chaofan2; Zhao, Chengyi2; Zhang, Yaoqi3; Li, Shoubo2 | |
通讯作者 | Zhao, Chengyi ; Zhang, Yaoqi |
来源期刊 | ECOLOGICAL MODELLING |
ISSN | 0304-3800 |
EISSN | 1872-7026 |
出版年 | 2018 |
卷号 | 388页码:72-79 |
英文摘要 | Accurate predictions of water vapor at large temporal and spatial scales are particularly important in global studies. In recent years, Central Asian grasslands have been subject to both intensive grazing and variability in climatic conditions. However, uncertainties about grazing on water cycling under climate change still exist. Therefore, the Biome-BGC grazing model was applied to assess the effects of grazing on evapotranspiration (ET) and water use efficiency (WUE). Three grassland types were studied during the period 1979-2011: forest meadow (FM), temperate grassland (TG) and desert grassland (DG). ET shows a gradual decreasing trend from FM (365.65 +/- 36.86 m(-2) yr(-1)) to DG (183.32 +/- 21.15 m(-2) yr(-1)), and WUE ranging from 0.62 +/- 0.03 g C kg(-1) H2O in FM to 1.12 +/- 0.10 g C kg(-1) H2O in TG, with an average of 0.83 +/- 0.05 g C kg(-1) H2O. Although there was a significant decrease in ET of 1.47-2.72 mm yr(-1), WUE increased at a rate of 0.004 g C kg(-1) H2O yr(-1) in Central Asia. From 1979 to 2011, grazing lowered ET by 7.47% in Central Asia; the reduction rates for FM, TG and DG were 3.10%, 12.70% and 7.42%, respectively. In general, grazing decreased WUE by 3.60%. From non -grazed to grazed scenario, WUE increased by 6.86% for FM, but WUE decreased by 7.27% and 5.61% for TG and DG. An over-compensation of GPP under grazing might account for the higher WUE under certain grazing intensities. In order to achieve maximum utilization of water efficiency, proper grazing intensity for TG, DG and FM should be limited to 0.17, 0.39 and 0.38 head/ha, respectively. |
英文关键词 | Evapotranspiration Water use efficiency Grazing Central Asia |
类型 | Article |
语种 | 英语 |
国家 | Peoples R China ; USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000451354000008 |
WOS关键词 | INTERANNUAL VARIABILITY ; CARBON-DIOXIDE ; INNER-MONGOLIA ; EVAPOTRANSPIRATION ; GRASSLAND ; CLIMATE ; PRECIPITATION ; SIMULATION ; RANGELANDS ; BIOMASS |
WOS类目 | Ecology |
WOS研究方向 | Environmental Sciences & Ecology |
来源机构 | 南京信息工程大学 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/208766 |
作者单位 | 1.Nanjing Univ Informat Sci Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Land Sci Res Ctr, Nanjing 210044, Jiangsu, Peoples R China; 2.Nanjing Univ Informat Sci Technol, Sch Geog Sci, Nanjing 210044, Jiangsu, Peoples R China; 3.Auburn Univ, Sch Forestry & Wildlife Sci, Auburn, AL 36849 USA |
推荐引用方式 GB/T 7714 | Han, Qifei,Li, Chaofan,Zhao, Chengyi,et al. Grazing decreased water use efficiency in Central Asia from 1979 to 2011[J]. 南京信息工程大学,2018,388:72-79. |
APA | Han, Qifei,Li, Chaofan,Zhao, Chengyi,Zhang, Yaoqi,&Li, Shoubo.(2018).Grazing decreased water use efficiency in Central Asia from 1979 to 2011.ECOLOGICAL MODELLING,388,72-79. |
MLA | Han, Qifei,et al."Grazing decreased water use efficiency in Central Asia from 1979 to 2011".ECOLOGICAL MODELLING 388(2018):72-79. |
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