Changes in spatial variations of sap flow in Korean pine trees due to environmental factors and their effects on estimates of stand transpiration
文献类型：期刊论文
| 作者 | Minkyu MOON; Taekyu KIM; Juhan PARK; Sungsik CHO; Daun RYU; Sanguk SUH; Hyun Seok KIM |
| 刊名 | Journal of Mountain Science
 |
| 出版日期 | 2016-06 |
| 卷号 | 13期号:6页码:1024-1034 |
| 关键词 | Sap flow Environmental factors Pinus koraiensis Scale-up Stand transpiration |
| ISSN号 | 1672-6316 |
| 通讯作者 | Hyun Seok KIM |
| 英文摘要 | It is difficult to scale up measurements of the sap flux density (JS) for the characterization of tree or stand transpiration (E) due to spatial variations in JS and their temporal changes. To assess spatial variations in the sap flux density of Korean pine (Pinus koraiensis) and their effects on E estimates, we measured the JS using Granier-type sensors. Within trees, the JS decreased exponentially with the radial depth, and the JS of the east aspects were higher than those of the west aspects. Among trees, there was a positive relationship between JS and the tree diameter at breast height, and this positive relationship became stronger as the transpiration demand increased. The spatial variations that caused large errors in E estimates (i.e., up to 110.8 % when radial variation was ignored) had varied systematically with environmental factors systematic characteristics in relation to environmental factors. However, changes in these variations did not generate substantial errors in the E estimates. For our study periods, the differences in the daily E (ED) calculated by ignoring radial, azimuthal and tree-to-tree variations and the measured ED were fairly constant, especially when the daily vapor pressure deficit (D_D) was higher than 0.6 kPa. These results imply that the effect of spatial variations changes on sap flow can be a minor source of error compared with spatial variations (radial, azimuthal and tree-to-tree variations) when considering E estimates. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/17217]  |
| 专题 | 成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2016_Vol13 No.6 |
| 推荐引用方式 GB/T 7714 | Minkyu MOON,Taekyu KIM,Juhan PARK,et al. Changes in spatial variations of sap flow in Korean pine trees due to environmental factors and their effects on estimates of stand transpiration[J]. Journal of Mountain Science,2016,13(6):1024-1034. |
| APA | Minkyu MOON.,Taekyu KIM.,Juhan PARK.,Sungsik CHO.,Daun RYU.,...&Hyun Seok KIM.(2016).Changes in spatial variations of sap flow in Korean pine trees due to environmental factors and their effects on estimates of stand transpiration.Journal of Mountain Science,13(6),1024-1034. |
| MLA | Minkyu MOON,et al."Changes in spatial variations of sap flow in Korean pine trees due to environmental factors and their effects on estimates of stand transpiration".Journal of Mountain Science 13.6(2016):1024-1034. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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