干旱区生态环境知识资源中心(Arid): Variations in sap flow of Zenia insignis under different rock bareness rate in North Guangdong, China

Arid

DOI	10.1007/s11629-019-5511-y
	Variations in sap flow of Zenia insignis under different rock bareness rate in North Guangdong, China
	Li Hui-xia 1; Zhou Hong-yi 1; Wei Xing-hu 1; Lu Nan 2; Liang Zhao-xiong 1
通讯作者	Zhou Hong-yi
来源期刊	JOURNAL OF MOUNTAIN SCIENCE
ISSN	1672-6316
EISSN	1993-0321
出版年	2019
卷号	16 期号:10 页码:2320-2334
英文摘要	Understanding the impact of rock bareness on the transpiration in karst plants is essential to karst rocky desertification control and sustainable management of plantation in karst area. This study focused on the variations in sap flow of Zenia insignis caused by different rock bareness rate, and the impact of climate factors, soil water content (SWC) and leaf area index (LAI) on transpiration in karst plants, by continuously measuring sap flux densities (Fd) of 12 sample trees using thermal dissipation probes and monitoring micrometeorology and SWC on a typical karst hill in north Guangdong of China during the year of 2016. Results show that: (1) the maximum hourly sap flux density occurred at 11:00-14:00 and the peak daily sap flux density occurred in September. (2) Sap flow density of Zenia insignis increased with rock bareness rate at all hourly, daily and monthly scales, with the sequence of extremely severe > severe > moderate > mild rock bareness. (3) The transpiration of Zenia insignis is controlled by different factors at different temporal scales. At hourly scale, transpiration was highly (n=144, R-2>0.72) correlated to Solar radiation (R-s), Air temperature (T-a), relative humidity (RH), and water vapor pressure deficit (VPD). At daily scale, transpiration was greatly (77=366, R-2>0.31) affected by Solar radiation (Rs), Air temperature (T-a), and water vapor pressure deficit (VPD). While at monthly scale, transpiration was mainly (n=12, R-2=0.8s) controlled by LAI. Our study proved that Zenia insignis has a good physiecological adaption to fragile karst environment, and Zenia insignis plantation has long-term sustainability even in extremely rocky landscapes. The results may provide scientific basis for plantation management and ecological restoration in karst area.
英文关键词	Sap flow Thermal dissipation probes Rock bareness Karst ecosystems Zenia insignis
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000489956000009
WOS关键词	STOMATAL CONDUCTANCE ; PHYSIOLOGICAL CONTROLS ; ENVIRONMENTAL CONTROLS ; STAND TRANSPIRATION ; LOESS PLATEAU ; FLUX-DENSITY ; WATER ; FOREST ; DEPENDENCE ; DIAMETER
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
EI主题词	2019-10-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310119
作者单位	1.Foshan Univ, Dept Spatial Informat & Resource Environm, Foshan 528000, Peoples R China; 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China
推荐引用方式 GB/T 7714	Li Hui-xia,Zhou Hong-yi,Wei Xing-hu,et al. Variations in sap flow of Zenia insignis under different rock bareness rate in North Guangdong, China[J],2019,16(10):2320-2334.
APA	Li Hui-xia,Zhou Hong-yi,Wei Xing-hu,Lu Nan,&Liang Zhao-xiong.(2019).Variations in sap flow of Zenia insignis under different rock bareness rate in North Guangdong, China.JOURNAL OF MOUNTAIN SCIENCE,16(10),2320-2334.
MLA	Li Hui-xia,et al."Variations in sap flow of Zenia insignis under different rock bareness rate in North Guangdong, China".JOURNAL OF MOUNTAIN SCIENCE 16.10(2019):2320-2334.