Combining sap flow measurements and modelling to assess water needs in an oasis farmland shelterbelt of populus simonii carr in northwest china
文献类型：期刊论文
| 作者 | Fu, Shuai1,3,4; Sun, Lin2; Luo, Yi1,2,4 |
| 刊名 | Agricultural water management
 |
| 出版日期 | 2016-11-01 |
| 卷号 | 177页码:172-180 |
| 关键词 | Water needs Conductance Farmland shelterbelt Water stress |
| ISSN号 | 0378-3774 |
| DOI | 10.1016/j.agwat.2016.07.015 |
| 通讯作者 | Luo, yi(luoyi.cas@hotmail.com) |
| 英文摘要 | Farmland shelterbelts provide an ecological protection screen for an oasis but exhibit high mortality in the face of water shortage. it is necessary to understand farmland shelterbelt tree transpiration under different levels of water stress and stand ages for proper management. sap flux measurement techniques and models are among the most useful method to detect water stress and to evaluate plant water consumption. the usefulness of both methods decreases, however, when applied to species, such as populus simonii carr, that have an outstanding tolerance to drought and a remarkable capacity to take up water from drying soils. our hypothesis is that analysis using simultaneous measurements of sap flow and models in the same trees is useful for assessing the irrigation needs in farmland shelterbelts. to test our hypothesis, we analysed the relationships between canopy transpiration, canopy conductance, relative extractable water and atmospheric factors in a farmland shelterbelt and evaluated the effectiveness of the model. measurements were made during one growing season. the time courses of sap flow measured and modelled on days of contrasting weather and soil water conditions were analysed to evaluate the usefulness of the method to assess the crop water needs. we calculated the daily tree water consumption from sap flow measurements and the parameterized modified jarvis-stewart model, and we evaluated the model's usefulness to assess the final water needs under water stress and stand ages for farmland shelterbelt irrigation. the transpiration decreased as the soil drought increased, and it increased as the atmospheric drought increased. the time course of the water needs showed that the occurrence of water stress in the farmland shelterbelt trees had a large impact on their water consumption, which increased as the water stress decreased, following the equation y = 1/[1 + e(-60.67) (x (rewx-0.402))]. the simultaneous use of modelling and tree structural data increased the reliability of assessing water needs from youth to maturity. a similar analysis with the water consumption values, from which stand age values were derived, showed that water needs increased with the tree age following the equation y = 847 - 844/[1 + (x/87.9)(1.9)]. we conclude that compared to the use of sap flow records alone, the simultaneous use of sap flow records and model values provides more detailed information to assess water needs in a farmland shelterbelt, which has an important significance for farmland shelterbelt protection. (c) 2016 elsevier b.v. all rights reserved. |
| WOS关键词 | CANOPY CONDUCTANCE ; TRANSPIRATION RESPONSE ; LOESS PLATEAU ; IRRIGATED GRAPEVINES ; STOMATAL CONDUCTANCE ; SOIL-MOISTURE ; FOREST STANDS ; DROUGHT ; TREES ; REGION |
| WOS研究方向 | Agriculture ; Water Resources |
| WOS类目 | Agronomy ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000385322900016 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2374843 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Luo, Yi |
| 作者单位 | 1.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 3.Nanchang Univ, Sch Resources Environm & Chem Engn, Nanchang 330031, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Fu, Shuai,Sun, Lin,Luo, Yi. Combining sap flow measurements and modelling to assess water needs in an oasis farmland shelterbelt of populus simonii carr in northwest china[J]. Agricultural water management,2016,177:172-180. |
| APA | Fu, Shuai,Sun, Lin,&Luo, Yi.(2016).Combining sap flow measurements and modelling to assess water needs in an oasis farmland shelterbelt of populus simonii carr in northwest china.Agricultural water management,177,172-180. |
| MLA | Fu, Shuai,et al."Combining sap flow measurements and modelling to assess water needs in an oasis farmland shelterbelt of populus simonii carr in northwest china".Agricultural water management 177(2016):172-180. |
入库方式： iSwitch采集
来源：中国科学院大学
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。