Stand transpiration and canopy conductance dynamics of Populus popularis under varying water availability in an arid area
文献类型：期刊论文
| 作者 | Du, Jiali1; Dai, Xiaoqin2; Huo, Zailin1; Wang, Xingwang1; Wang, Shuai1; Wang, Chaozi1; Zhang, Chenglong1; Huang, Guanhua1 |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2023-09-20 |
| 卷号 | 892页码:13 |
| ISSN号 | 0048-9697 |
| 关键词 | Stand transpiration Canopy conductance Vapor pressure deficit Soil moisture Groundwater table depth |
| DOI | 10.1016/j.scitotenv.2023.164397 |
| 通讯作者 | Dai, Xiaoqin(daixq@igsnrr.ac.cn) ; Huo, Zailin(huozl@cau.edu.cn) |
| 英文摘要 | As a tree species of shelterbelts, Populus popularis maintains significant ecological functions in arid and semiarid areas. However, stand transpiration (T) and canopy conductance (gc) dynamics of P. popularis are unclear in arid irrigated areas with shallow groundwater fluctuations. To better understand the responses of T and gc to meteorological factors, soil water, and shallow groundwater in arid areas, we observed the environmental conditions and sap flow of P. popularis, and quantified T and gc in three growing seasons of 2018-2020 in a typical arid area of China. Results showed T and gc ranged from 0.18 to 6.11 mm day-1 and 2.26-12.54 mm s-1 in 2018-2020, respectively. Solar radiation and vapor pressure deficit (VPD) were major drivers of Tat daily scales. It was consistently found that T exponentially decreased with increasing groundwater table depth (GTD) and decreasing reference evapotranspiration in three years. gc is primarily influenced by VPD and is positively related to soil water content in 0-30 cm soil layer (SWC0-30cm). Moreover, low SWC0-30cm and deepening GTD jointly decreased T and gc by 22.45 % and 30.41 %, respectively. The response of gc to VPD was susceptible to groundwater fluctuations, and the synergistic influences of VPD and GTD on gc could be well described by the logarithmic function, especially in 2019. The sensitivity of gc to VPD and its variations under different environmental conditions suggested that a flexible stomatal regulation of transpiration occurred in the observed P. popularis with the arid climate and shallow groundwater. These findings provided the essential basis for the water use strategy of P. popularis and stand water resources management in arid regions. |
| WOS关键词 | INLAND RIVER-BASIN ; STOMATAL CONDUCTANCE ; SAP FLOW ; SOIL-MOISTURE ; DECOUPLING COEFFICIENT ; RIPARIAN COTTONWOODS ; SHELTER-BELT ; RAIN-FOREST ; SCOTS PINE ; TREES |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:001053065000001 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/196604]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Dai, Xiaoqin; Huo, Zailin |
| 作者单位 | 1.China Agr Univ, Ctr Agr Water Res China, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Qianyanzhou Ecol Res Stn, Key Lab Ecosyst Network Observat & Modeling, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Du, Jiali,Dai, Xiaoqin,Huo, Zailin,et al. Stand transpiration and canopy conductance dynamics of Populus popularis under varying water availability in an arid area[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2023,892:13. |
| APA | Du, Jiali.,Dai, Xiaoqin.,Huo, Zailin.,Wang, Xingwang.,Wang, Shuai.,...&Huang, Guanhua.(2023).Stand transpiration and canopy conductance dynamics of Populus popularis under varying water availability in an arid area.SCIENCE OF THE TOTAL ENVIRONMENT,892,13. |
| MLA | Du, Jiali,et al."Stand transpiration and canopy conductance dynamics of Populus popularis under varying water availability in an arid area".SCIENCE OF THE TOTAL ENVIRONMENT 892(2023):13. |
入库方式： OAI收割
来源：地理科学与资源研究所
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