Variations in sap flow of Zenia insignis under different rock bareness rate in North Guangdong, China

doi:10.1007/s11629-019-5511-y

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2019 > Vol16 No.10

	Variations in sap flow of Zenia insignis under different rock bareness rate in North Guangdong, China
	Li Hui-xia; Zhou Hong-yi; Wei Xing-hu; Lu Nan; Liang Zhao-xiong
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2019
卷号	16 期号:10 页码:2320-2334
关键词	Sap flow Thermal dissipation probes Rock bareness Karst ecosystems Zenia insignis
ISSN号	1672-6316
DOI	10.1007/s11629-019-5511-y
文献子类	Article
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.
电子版国际标准刊号	1993-0321
语种	英语
WOS记录号	WOS:000489956000009
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/46595]
专题	Journal of Mountain Science_Journal of Mountain Science-2019_Vol16 No.10
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]. JOURNAL OF MOUNTAIN SCIENCE,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.