Stable isotopic observation of water use sources of Pinus sylvestris var. mongolica in Horqin Sandy Land, China
文献类型：SCI/SSCI论文
| 作者 | Wei Y. F. ; Fang J. ; Liu S. ; Zhao X. Y. ; Li S. G. |
| 发表日期 | 2013 |
| 关键词 | Mongolian pine plantation Stable isotope composition Tree water uptake sources hydraulic lift soil-water precipitation plants forest redistribution extraction hydrology deuterium movement |
| 英文摘要 | Since the late 1950s, Mongolian pine (Pinus sylvestris var. mongolica) has been widely planted for vegetation restoration in arid and semi-arid areas in North China. We used stable isotope signals from precipitation, soil water, and xylem water of Mongolian pine trees, which were planted in early 1980s on sand dunes in the east-southern margin of Horqin Sandy Land, to identify water uptake sources of this tree. (1) Stable O-18 isotope composition of the xylem water exhibited little seasonality, suggesting that the trees use a relatively stable water source; (2) the water source of the pine trees primarily came from a soil depth of 20-60 cm (sampling depth up to 60 cm in this study) and the trees might use groundwater when soil moisture became extremely low; and (3) there was not much difference in water sources used by the pine trees grown at the top of the fixed dune and in the inter dune lowland, although these two sites had 3-8 m elevation difference. This study suggests that it is critical for Mongolian pine trees to access relatively reliable and stable water sources to grow in sandy land habitats, and timely recharging of rainwater to the trees' rooting depth is requisite for avoiding and/or reducing their degradation caused by water shortage. |
| 出处 | Trees-Structure and Function |
| 卷 | 27 |
| 期 | 5 |
| 页 | 1249-1260 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0931-1890 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/30167]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Wei Y. F.,Fang J.,Liu S.,et al. Stable isotopic observation of water use sources of Pinus sylvestris var. mongolica in Horqin Sandy Land, China. 2013. |
入库方式： OAI收割
来源：地理科学与资源研究所
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