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

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	Variations in sap flow of Zenia insignis under different rock bareness rate in North Guangdong,China
	Li Huixia; Zhou Hongyi; Wei Xinghu; Lu Nan; Liang Zhaoxiong
来源期刊	Journal of Mountain Science
ISSN	1672-6316
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 (F_d) 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 (n=366,R~2>0.31) affected by Solar radiation (R_s),Air temperature (T_a),and water vapor pressure deficit (VPD).While at monthly scale,transpiration was mainly (n=12,R~2=0.85) 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
收录类别	CSCD
WOS研究方向	Forestry
CSCD记录号	CSCD:6584544
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/336181
作者单位	Li Huixia, Department of Spatial Information and Resource-Environment,Foshan University, Foshan, Guangdong 528000, China.; Zhou Hongyi, Department of Spatial Information and Resource-Environment,Foshan University, Foshan, Guangdong 528000, China.; Wei Xinghu, Department of Spatial Information and Resource-Environment,Foshan University, Foshan, Guangdong 528000, China.; Liang Zhaoxiong, Department of Spatial Information and Resource-Environment,Foshan University, Foshan, Guangdong 528000, China.; Lu Nan, Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences, State Key Laboratory of Urban and Regional Ecology, Beijing 100085, China.
推荐引用方式 GB/T 7714	Li Huixia,Zhou Hongyi,Wei Xinghu,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 Huixia,Zhou Hongyi,Wei Xinghu,Lu Nan,&Liang Zhaoxiong.(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 Huixia,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.