干旱区生态环境知识资源中心(Arid): Sap flow of Salix psammophila and its principal influencing factors at different slope positions in the Mu Us desert

Arid

DOI	10.1371/journal.pone.0225653
	Sap flow of Salix psammophila and its principal influencing factors at different slope positions in the Mu Us desert
	Pei, Zhiyong; Hao, Shaorong; Pang, Guohui; Wang, Kai; Liu, Tiejun
通讯作者	Liu, TJ (corresponding author), Minist Water Resources, Inst Water Resources Pastoral Area, Hohhot, Peoples R China.
来源期刊	PLOS ONE
ISSN	1932-6203
出版年	2019
卷号	14 期号:12
英文摘要	The changes in sap flow of Salix psammophila growing on a gentle slope (lower slope, P1), a middle slope (P2), and an upper slope (P3), and the response of sap flow to meteorological factors at the different slope positions were studied using the continuous and synchronized observations, the instrument were wrapped stem flowmeter EMS 62 sap-flow heat-balance-based system and the LSI-LASTEM automatic weather station. The results revealed that the soil moisture content was the highest and the growth conditions of Salix psammophila were the best at P1, followed by P2. At P3, however, although good apical dominance was observed, the proportion of dead branches was the highest. Furthermore, the daily variation patterns of sap flow on the three slopes presented as multi-peak bell-shaped curves. The daily accumulation changes in sap flow showed a trend of P1 > P3 > P2, and within the same diameter range, the sap flow at P1 was significantly different from that at P2 and P3, whereas the sap flow at P2 and P3 did not vary significantly. All the three slopes showed a significant and positive correlation with photosynthetically active radiation, atmospheric temperature, and vapor pressure difference, and a significant and negative correlation with relative humidity; however, the degrees of correlation varied slightly. The step-wise regression analysis showed that, at different slopes, different variables were selected for different branch diameters, but photosynthetically active radiation and atmospheric temperature played dominant roles on all slopes. This study reveals the sap flow pattern of Salix psammophila on different slopes and its response mechanism to meteorological factors, which was essential for understanding the restoration ability, physiological adaptability, and ecosystem stability of Salix psammophila communities.
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000534009700034
WOS关键词	ENVIRONMENTAL-FACTORS ; TRANSPIRATION ; WATER ; EVAPOTRANSPIRATION ; VELOCITY ; DENSITY ; SHRUBS ; REGION ; TREES
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/369749
作者单位	[Pei, Zhiyong; Hao, Shaorong; Pang, Guohui; Wang, Kai] Inner Mongolia Agr Univ, Coll Energy & Transportat Engn, Hohhot, Inner Mongolia, Peoples R China; [Liu, Tiejun] Minist Water Resources, Inst Water Resources Pastoral Area, Hohhot, Peoples R China
推荐引用方式 GB/T 7714	Pei, Zhiyong,Hao, Shaorong,Pang, Guohui,et al. Sap flow of Salix psammophila and its principal influencing factors at different slope positions in the Mu Us desert[J],2019,14(12).
APA	Pei, Zhiyong,Hao, Shaorong,Pang, Guohui,Wang, Kai,&Liu, Tiejun.(2019).Sap flow of Salix psammophila and its principal influencing factors at different slope positions in the Mu Us desert.PLOS ONE,14(12).
MLA	Pei, Zhiyong,et al."Sap flow of Salix psammophila and its principal influencing factors at different slope positions in the Mu Us desert".PLOS ONE 14.12(2019).