Root distribution of three dominant desert shrubs and their water uptake dynamics
文献类型：期刊论文
| 作者 | Xu, Shiqin1; Ji, Xibin2; Jin, Bowen2; Zhang, Jinglin3 |
| 刊名 | JOURNAL OF PLANT ECOLOGY
 |
| 出版日期 | 2017-10-01 |
| 卷号 | 10期号:5页码:780-790 |
| 关键词 | root architecture stem sap flow water-use strategy arid region desert shrub |
| ISSN号 | 1752-9921 |
| DOI | 10.1093/jpe/rtw079 |
| 通讯作者 | Ji, Xibin(xuanzhij@ns.lzb.ac.cn) |
| 英文摘要 | Aims Root architecture is a crucial determinant in the water use of desert shrubs. However, lack of integrated research on the root functional type and water uptake dynamic hinders our current understanding of the water-use strategies of desert species. Methods A field experiment was conducted to investigate the root functional type of three dominant desert species, Haloxylon ammodendron, Nitraria tangutorum and Calligonum mongolicum, and the dynamics of their root water uptake. The stem sap flow and microclimate were monitored, and the intact root systems of these shrubs were excavated in their native habitats on the oasis-desert ecotone of northwestern China during the summer of 2014. Important Findings Based on root functional type, H. ammodendron is phreatophytic, while N. tangutorum and C. mongolicum are non-phreatophytic species, which means H. ammodendron can utilize multiple potential water sources, N. tangutorum and C. mongolicum mainly utilize shallow and middle soil water. The average root water uptake rates (RWU) of H. ammodendron, N. tangutorum and C. mongolicum were 0.56 (+/- 0.12), 1.18 (+/- 0.19) and 1.31 (+/- 0.30) kg m(-2) h(-1), respectively, during the experimental period; the contributions of night-time RWU to total water uptake amount for the corresponding species were 12.7, 2.9 and 10.6%, respectively. The diurnal and seasonal dynamics of RWU in the three species were significantly different (P < 0.05), and closely related to environmental variables, especially to photosynthetically active radiation and vapor pressure deficit. Our results suggested that the three species have distinct water-use patterns in combination with the patterns of root distribution, which may alleviate water competition during long-term water shortages. H. ammodendron appears to be more drought tolerant than the other species due to its use of multiple water sources and stable water uptake rates during growing season. |
| 收录类别 | SCI |
| WOS关键词 | STAND-SCALE TRANSPIRATION ; JARVIS-STEWART MODEL ; MATURE APPLE TREE ; SOIL-WATER ; HALOXYLON-AMMODENDRON ; CANOPY CONDUCTANCE ; SAP FLOW ; STOMATAL CONDUCTANCE ; SURFACE CONDUCTANCE ; NORTHWEST CHINA |
| WOS研究方向 | Plant Sciences ; Environmental Sciences & Ecology |
| WOS类目 | Plant Sciences ; Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000417977800006 |
| 出版者 | OXFORD UNIV PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2558036 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Ji, Xibin |
| 作者单位 | 1.Hohai Univ, State Key Lab Hydrol Water Resources & Hydraul En, Coll Hydrol & Water Resources, 1 Xikang Rd, Nanjing 210098, Jiangsu, Peoples R China 2.Chinese Acad Sci, Linze Inland River Basin Res Stn, Lab Inland River Ecohydrol, Cold & Arid Reg Environm & Engn Res Inst, 320 Donggang West Rd, Lanzhou 730000, Gansu, Peoples R China 3.Univ Chinese Acad Sci, 19 A Yuquan Rd, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Shiqin,Ji, Xibin,Jin, Bowen,et al. Root distribution of three dominant desert shrubs and their water uptake dynamics[J]. JOURNAL OF PLANT ECOLOGY,2017,10(5):780-790. |
| APA | Xu, Shiqin,Ji, Xibin,Jin, Bowen,&Zhang, Jinglin.(2017).Root distribution of three dominant desert shrubs and their water uptake dynamics.JOURNAL OF PLANT ECOLOGY,10(5),780-790. |
| MLA | Xu, Shiqin,et al."Root distribution of three dominant desert shrubs and their water uptake dynamics".JOURNAL OF PLANT ECOLOGY 10.5(2017):780-790. |
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来源：寒区旱区环境与工程研究所
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