干旱区生态环境知识资源中心(Arid): Scaling Up Sap Flow Measurements from the Stem Scale to the Individual Scale for Multibranched Caragana Korshinskii on the Chinese Loess Plateau

Arid

DOI	10.3390/f10090785
	Scaling Up Sap Flow Measurements from the Stem Scale to the Individual Scale for Multibranched Caragana Korshinskii on the Chinese Loess Plateau
	Wang, Guohui 1,2,3; Shen, Yuying 1,2,3; Yang, Xianlong 1,2,3; Chen, Zhixue 1,2,3; Mo, Baoru 4
通讯作者	Shen, Yuying
来源期刊	FORESTS
EISSN	1999-4907
出版年	2019
卷号	10 期号:9
英文摘要	The traditional heat balance method for measuring plant sap flow (SF) becomes troublesome and uneconomic for multibranched shrub species if all their stems are used for the measurement. The objectives of this study were to explore specific relationships between stem-scale SF and plant morphological traits and then to scale up SF measurements from the stem scale to the individual scale for Caragana korshinskii Kom., a dominant shrub species on the Chinese Loess Plateau. Sap flow was measured for twenty-one stems from three representative individuals from July to September 2018 during the rainy season. The results indicated that the stem-scale SF in C. korshinskii presented a positive linear correlation with the stem base diameter (SBD), stem length (SL), primary branch numbers in the stem (PBN), and estimated stem biomass (W). The SBD-based statistical models performed well in estimating the stem-scale SF, with an R-2 value of 0.9726 and root mean squared error (RMSE) of 2.5389 g h(-1). Over the canopy projection area, the individual-scale transpiration flows for the three selected C. korshinskii were 1.91, 1.10, and 1.59 mm center dot d(-1). In addition, stem-scale SF was positively and linearly correlated with air temperature, photosynthetically active radiation, vapor pressure deficit, reference crop evapotranspiration, and variable transpiration. This study sheds light on morphological and meteorological influences on stem-scale SF and has made contributes to the accurate and rapid estimation of the plant sap flow from easily available morphological traits for multibranched shrub species in semiarid regions. Limitations, however, may exist for the established model when it is used to estimate SF of C. korshinskii during the water-limited dry season. Our study deserves further exploration of a more general model to have a better estimation of SF for C. korshinskii in both dry and rainy seasons.
英文关键词	sap flow morphological traits meteorological factor stem scale individual scale
类型	Article
语种	英语
国家	Peoples R China
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000487978700024
WOS关键词	HEAT-BALANCE METHOD ; AREA TENGGER DESERT ; SOIL-MOISTURE ; RAINFALL PULSES ; CANOPY TRANSPIRATION ; STAND TRANSPIRATION ; FOREST TYPES ; SANDY LAND ; WATER-USE ; SHRUBS
WOS类目	Forestry
WOS研究方向	Forestry
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215708
作者单位	1.Lanzhou Univ, State Key Lab Grassland Agroecosyst, Lanzhou 730020, Gansu, Peoples R China; 2.Lanzhou Univ, Minist Agr & Rural Affairs, Key Lab Grassland Livestock Ind Innovat, Lanzhou 730020, Gansu, Peoples R China; 3.Lanzhou Univ, Coll Pastoral Agr Sci & Technol, Minist Educ, Engn Res Ctr Grassland Ind, Lanzhou 730020, Gansu, Peoples R China; 4.Gansu Acad Forestry Sci, Inst Ecol Management Loess Reg, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Wang, Guohui,Shen, Yuying,Yang, Xianlong,et al. Scaling Up Sap Flow Measurements from the Stem Scale to the Individual Scale for Multibranched Caragana Korshinskii on the Chinese Loess Plateau[J]. 兰州大学,2019,10(9).
APA	Wang, Guohui,Shen, Yuying,Yang, Xianlong,Chen, Zhixue,&Mo, Baoru.(2019).Scaling Up Sap Flow Measurements from the Stem Scale to the Individual Scale for Multibranched Caragana Korshinskii on the Chinese Loess Plateau.FORESTS,10(9).
MLA	Wang, Guohui,et al."Scaling Up Sap Flow Measurements from the Stem Scale to the Individual Scale for Multibranched Caragana Korshinskii on the Chinese Loess Plateau".FORESTS 10.9(2019).