The response of sap flow in shrubs to rainfall pulses in the desert region of China
文献类型：期刊论文
| 作者 | Zhao, Wenzhi; Liu, Bing |
| 刊名 | AGRICULTURAL AND FOREST METEOROLOGY
 |
| 出版日期 | 2010-08-15 |
| 卷号 | 150期号:9页码:1297-1306 |
| 关键词 | Rainfall pulse Desert shrubs Sap velocity Rainfall response Threshold-delay model |
| ISSN号 | 0168-1923 |
| DOI | 10.1016/j.agrformet.2010.05.012 |
| 通讯作者 | Zhao, Wenzhi(zhaowzh@lzb.ac.cn) |
| 英文摘要 | Rainfall pulses can significantly drive the evolution of the structure and function of desert ecosystems, and understanding the mechanisms that underlie the response of desert plants to rainfall is the key to understanding the responses of desert ecosystems to global climatic change. The present study was carried out at the desert-oasis ecotone in the middle of China's Heihe River Basin. We measured sap flow in the branches and stems of desert shrubs (Nitraria sphaerocarpa and Elaeagnus angustifolia) using sap flow gauges, and studied the response of sap velocity to rainfall pulses using the "threshold-delay" model. The results showed that the response of sap flow began about 1 h earlier after rainfall, and that sap velocity increased two to threefold, compared to its pre-rainfall value. The sap velocity increased significantly, then decreased gradually, with increasing rainfall. The response of sap flow differed significantly between rainfall, species, position within species during pulse duration, and the interactive effects also differed significantly (P<0.0001). The response pattern followed the threshold-delay model, with lower thresholds of <= 5.2 and 1 mm of rainfall for the stems and branches, respectively, demonstrating the importance of small rainfall events (<5 mm) for plant growth and survival in desert regions. (C) 2010 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| WOS关键词 | HEAT-BALANCE METHOD ; WATER-USE ; PRECIPITATION PULSES ; SOIL-WATER ; STOMATAL CONDUCTANCE ; NORTHWESTERN CHINA ; SHORTGRASS STEPPE ; PLANT-RESPONSES ; TROPICAL FOREST ; ECOSYSTEMS |
| WOS研究方向 | Agriculture ; Forestry ; Meteorology & Atmospheric Sciences |
| WOS类目 | Agronomy ; Forestry ; Meteorology & Atmospheric Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000280943100014 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2556400 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Zhao, Wenzhi |
| 作者单位 | Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Key Lab Inland River Basin Ecohydrol, Linze Inland River Basin Res Stn, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Wenzhi,Liu, Bing. The response of sap flow in shrubs to rainfall pulses in the desert region of China[J]. AGRICULTURAL AND FOREST METEOROLOGY,2010,150(9):1297-1306. |
| APA | Zhao, Wenzhi,&Liu, Bing.(2010).The response of sap flow in shrubs to rainfall pulses in the desert region of China.AGRICULTURAL AND FOREST METEOROLOGY,150(9),1297-1306. |
| MLA | Zhao, Wenzhi,et al."The response of sap flow in shrubs to rainfall pulses in the desert region of China".AGRICULTURAL AND FOREST METEOROLOGY 150.9(2010):1297-1306. |
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来源：寒区旱区环境与工程研究所
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