Sources of water used by Pinus sylvestris var. mongolica trees based on stable isotope measurements in a semiarid sandy region of Northeast China
文献类型：期刊论文
| 作者 | Zhu, Jiaojun1,2,3; Li, Mingcai1,2,3; Zhang, Jinxin1,2,3; Song, Lining1,2,3; Lv, Linyou4 |
| 刊名 | AGRICULTURAL WATER MANAGEMENT
 |
| 出版日期 | 2016-01-31 |
| 卷号 | 164页码:281-290 |
| ISSN号 | 0378-3774 |
| 关键词 | Dieback Water Deficit Soil Water Groundwater |
| DOI | 10.1016/j.agwat.2015.10.018 |
| 英文摘要 | Dieback of Mongolian pine (Pinus sylvestris var. mongolica) forests in the semiarid sandy region of northern China occurs when the trees are approximately 30-35 years old. Water deficit was the most important reason for this dieback, but the water sources used by pine trees are poorly understood. We aimed to identify the water sources utilized by pine trees and to explore the potential mechanisms inducing Mongolian pine dieback. The delta D and delta O-18 of water in twig xylem, soil, rain and groundwater were analyzed in a 29-year-old pine stand during two consecutive years 2010 and 2011. Soil water content (SWC), tree transpiration and groundwater level were measured concurrently. The results demonstrated that trees utilized soil water in spring (April-May) and autumn (September-October). In contrast, trees used both soil water and groundwater in summer (June-August) during the two observed years. Additionally, 70.1% of water used by trees came from soil water when the SWC was high (6.6%), but 55.8% of water used by trees came from groundwater when the SWC was low (3.5%). The groundwater contribution to tree transpiration increased from 10.0% to 14.4% with the rainfall decreasing from 580 mm to 460 mm, with a mean value of 12.2%. However, in the year of 60% of the long-term annual rainfall, the mean SWC only was 2.7%. These findings indicate that groundwater was increasingly critical with decreasing rainfall. Groundwater should be thus the primary water source for the growth and survival of pine trees in the years of extreme low rainfall. The dieback of Mongolian pine forests occurred when the groundwater level declined suddenly in the years of extreme low rainfall. (C) 2015 Elsevier B.V. All rights reserved. |
| WOS研究方向 | Agriculture ; Water Resources |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE BV |
| WOS记录号 | WOS:000368042400008 |
| 源URL | [http://210.72.129.5/handle/321005/122391]  |
| 专题 | 中国科学院沈阳应用生态研究所 |
| 通讯作者 | Zhu, Jiaojun |
| 作者单位 | 1.Chinese Acad Sci, Inst Appl Ecol, State Key Lab Forest & Soil Ecol, Shenyang 110016, Peoples R China 2.Liaoning Key Lab Management Noncommercial Forests, Shenyang 110016, Peoples R China 3.Chinese Acad Sci, Qingyuan Forest CERN, Shenyang 110016, Peoples R China 4.Inst Wind Sand Land Improvement & Utilizat, Fuxing 123000, Liaoning, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhu, Jiaojun,Li, Mingcai,Zhang, Jinxin,et al. Sources of water used by Pinus sylvestris var. mongolica trees based on stable isotope measurements in a semiarid sandy region of Northeast China[J]. AGRICULTURAL WATER MANAGEMENT,2016,164:281-290. |
| APA | Zhu, Jiaojun,Li, Mingcai,Zhang, Jinxin,Song, Lining,&Lv, Linyou.(2016).Sources of water used by Pinus sylvestris var. mongolica trees based on stable isotope measurements in a semiarid sandy region of Northeast China.AGRICULTURAL WATER MANAGEMENT,164,281-290. |
| MLA | Zhu, Jiaojun,et al."Sources of water used by Pinus sylvestris var. mongolica trees based on stable isotope measurements in a semiarid sandy region of Northeast China".AGRICULTURAL WATER MANAGEMENT 164(2016):281-290. |
入库方式： OAI收割
来源：沈阳应用生态研究所
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。