Fine root distributions of shelterbelt trees and their water sources in an oasis of arid northwestern China
文献类型：期刊论文
| 作者 | Qingli Xiao1,2; Mingbin Huang2 |
| 刊名 | Journal of Arid Environments
 |
| 出版日期 | 2016-04-24 |
| 期号 | 130页码:30-39 |
| 通讯作者邮箱 | hmingbin@yahoo.com |
| 关键词 | Sap flow Irrigation Water consumption Water management |
| 通讯作者 | Mingbin Huang |
| 英文摘要 |
Shelterbelt trees play an important role in maintaining the sustainability of oases agricultural ecosystems,
but the trees require a considerable amount of water for survival. The objectives of this study were
to investigate the root distributions, transpiration and water sources of shelterbelt trees (Gansu Poplar;
Populus gansuensis) in order to improve water management efficiency. Fine root and soil water distributions
were investigated along three transects that passed through cropland and an adjacent shelterbelt,
while sap flow measurements were conducted on six Gansu Poplar trees. Results showed that roots
were mainly distributed within 5 m of both sides of an irrigation channel passing between the first and
second tree rows. The maximum distance to which trees extended fine roots horizontally was about 18 m
from the shelterbelt. In 2-m soil profiles, fine roots were mainly distributed in the 1.4e2.0 m and 0
e0.4 m layers depending on the available water sources. A positive relationship was observed between
soil water and fine root mass density. Trees grown near the cropland-shelterbelt border exploited water
from cropland irrigation and irrigation channel leakage, greatly enhancing their transpiration. During the
growing season of 2013, the mean total transpiration of trees grown farther away from the border (10.75
and 17.45 m) was 216.9 mm, whereas for trees grown nearer to the border (0.85 and 6.30 m) the amounts
were 670.1 and 488.7 mm, respectively. If the trees were assumed to absorb the same amount of water
from soil, rainfall and groundwater sources, then irrigation water sources provided 67.6% and 55.6% of
the water meeting the transpiration requirements of the trees closest to the border. The results have
important implications for water management in oasis agricultural areas by limiting the extension of
shelterbelt tree roots into adjacent cropland in order to improve irrigation water use efficiency. |
| 收录类别 | SCI |
| 原文出处 | http://www.sciencedirect.com/science/article/pii/S0140196316300301 |
| 语种 | 英语 |
| WOS记录号 | WOS:000376834200003 |
| 源URL | [http://ir.iswc.ac.cn/handle/361005/7752]  |
| 专题 | 水土保持研究所_水保所科研产出--SCI_2016--SCI |
| 作者单位 | 1.College of Resources and Environment, Northwest A&F University, Yangling 712100, China 2.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, China |
| 推荐引用方式 GB/T 7714 | Qingli Xiao,Mingbin Huang. Fine root distributions of shelterbelt trees and their water sources in an oasis of arid northwestern China[J]. Journal of Arid Environments,2016(130):30-39. |
| APA | Qingli Xiao,&Mingbin Huang.(2016).Fine root distributions of shelterbelt trees and their water sources in an oasis of arid northwestern China.Journal of Arid Environments(130),30-39. |
| MLA | Qingli Xiao,et al."Fine root distributions of shelterbelt trees and their water sources in an oasis of arid northwestern China".Journal of Arid Environments .130(2016):30-39. |
入库方式： OAI收割
来源：水土保持研究所
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