Hydraulic lift in Populus euphratica Oliv. from the desert riparian vegetation of the Tarim River Basin
Hao; Xingming; Chen; Yaning; Li; Weihong; Guo; Bin; Zhao; Ruifeng; Chen, YN, Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Key Lab Oasis Ecol & Desert Environm, Urumqi 830011, Peoples R China
2010
Source PublicationJOURNAL OF ARID ENVIRONMENTS
ISSN0140-1963
Volume74Issue:8Pages:905-911
AbstractIn the Tarim River Basin, the desert riparian forest vegetation is under high-temperature and aridity stress However, the vegetation can grow continuously because of deep rooting that can reach groundwater, which can thus redistribute water into the upper soil profile This paper describes patterns of hydraulic lift by Populus euphranca Oliv and discusses its ecological effects. Our results show that the tap root sap velocity of P euphranca Oliv is positive during the day and night However, a reverse sap flow was observed in the lateral roots during the night The soil water content of the subsoil was higher than that of the topsoil at depths of 0-120 cm When the sap flow of the lateral roots was reversed at night, the soil water content clearly increased. In particular, at depths of 60-120 cm, the soil water content at 4 00 was 28-38% greater than that at 16 00 The vapor pressure deficit was a factor that predominantly affected the root sap velocity, and the smaller vapor pressure deficit often facilitated a reverse sap flow in the lateral roots. Our findings demonstrate the hydraulic lift characteristics and ecological effects that occur in the desert riparian forest in extremely and regions of middle Asia (C) 2010 Elsevier Ltd. All rights reserved
Department[Hao, Xingming; Chen, Yaning; Li, Weihong; Guo, Bin; Zhao, Ruifeng] Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Key Lab Oasis Ecol & Desert Environm, Urumqi 830011, Peoples R China
KeywordNorthwest Coniferous Forests Soil-water Artemisia-tridentata Neotropical Savanna Groundwater Level Lower Reaches Root Systems Douglas-fir Deep Roots Tree Roots
Subject Area植物生理学
Indexed BySCI
Document Type期刊论文
Identifierhttp://ir.xjlas.org/handle/365004/9950
Collection中国科学院新疆生态与地理研究所(2010年以前数据)
Corresponding AuthorChen, YN, Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Key Lab Oasis Ecol & Desert Environm, Urumqi 830011, Peoples R China
Recommended Citation
GB/T 7714
Hao,Xingming,Chen,et al. Hydraulic lift in Populus euphratica Oliv. from the desert riparian vegetation of the Tarim River Basin[J]. JOURNAL OF ARID ENVIRONMENTS,2010,74(8):905-911.
APA Hao.,Xingming.,Chen.,Yaning.,Li.,...&Chen, YN, Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Key Lab Oasis Ecol & Desert Environm, Urumqi 830011, Peoples R China.(2010).Hydraulic lift in Populus euphratica Oliv. from the desert riparian vegetation of the Tarim River Basin.JOURNAL OF ARID ENVIRONMENTS,74(8),905-911.
MLA Hao,et al."Hydraulic lift in Populus euphratica Oliv. from the desert riparian vegetation of the Tarim River Basin".JOURNAL OF ARID ENVIRONMENTS 74.8(2010):905-911.
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