Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s12665-011-1474-1 |
The threshold of soil moisture and salinity influencing the growth of Populus euphratica and Tamarix ramosissima in the extremely arid region | |
Fu, Aihong; Li, Weihong; Chen, Yaning | |
通讯作者 | Li, Weihong |
来源期刊 | ENVIRONMENTAL EARTH SCIENCES |
ISSN | 1866-6280 |
EISSN | 1866-6299 |
出版年 | 2012 |
卷号 | 66期号:8页码:2519-2529 |
英文摘要 | The drought and salt tolerance of two pioneer species, Populus euphratica and Tamarix ramosissima, were studied by monitoring the stem and leaf water potentials under various soil moisture and salinity at depths of 0-180 cm. The plants are naturally distributed in arid environment in the lower reaches of the Tarim River in Xinjiang, China. The results showed that P. euphratica can withhold water by prolonging dewatering and adapt to the dry desert weather by reducing water consumption. The lowest soil moisture that would unfavorably influence its growth was found to be 7% soil moisture. T. ramosissima was found to have low water potential and high transpiration efficiency. It is capable of absorbing water from the soil by keeping a low water potential, so there is no critical limit of soil moisture for T. ramosissima. In terms of salt resistance, P. euphratica was found to secrete salt from its body by discharging salty water through portals in its trunks and leaves. A soil salinity of 20% was the minimum concentration at which the salt secretion mechanism of P. euphratica was activated. T. ramosissima secreted salt by storing the accumulated salt in the vacuoles of its salt secretion glands for separation. Thus, it has no minimum soil salinity limit. T. ramosissima was found to have better resistance to drought and salt stress than P. euphratica. |
英文关键词 | Populus euphratica Tamarix ramosissima The soil moisture The soil salinity The threshold |
类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
收录类别 | SCI-E |
WOS记录号 | WOS:000307244400030 |
WOS关键词 | WATER-USE ; PHYSIOLOGICAL-RESPONSE ; SALT-GLANDS ; TARIM RIVER ; TOLERANCE ; REACHES ; STRESS |
WOS类目 | Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Geology ; Water Resources |
来源机构 | 中国科学院新疆生态与地理研究所 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/172184 |
作者单位 | Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China |
推荐引用方式 GB/T 7714 | Fu, Aihong,Li, Weihong,Chen, Yaning. The threshold of soil moisture and salinity influencing the growth of Populus euphratica and Tamarix ramosissima in the extremely arid region[J]. 中国科学院新疆生态与地理研究所,2012,66(8):2519-2529. |
APA | Fu, Aihong,Li, Weihong,&Chen, Yaning.(2012).The threshold of soil moisture and salinity influencing the growth of Populus euphratica and Tamarix ramosissima in the extremely arid region.ENVIRONMENTAL EARTH SCIENCES,66(8),2519-2529. |
MLA | Fu, Aihong,et al."The threshold of soil moisture and salinity influencing the growth of Populus euphratica and Tamarix ramosissima in the extremely arid region".ENVIRONMENTAL EARTH SCIENCES 66.8(2012):2519-2529. |
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