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Journal of Arid Land  2014, Vol. 6 Issue (5): 612-627    DOI: 10.1007/s40333-014-0007-7
Research Articles     
Radial profile of sap flow velocity in mature Xinjiang poplar (Populus alba L. var. pyramidalis) in Northwest China
HongZhong DANG1*, TianShan ZHA2, JinSong ZHANG3, Wei LI1, ShiZeng LIU4
1 Institute of Desertification Studies, Chinese Academy of Forestry, Beijing 100091, China;
2 School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;
3 Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, China;
4 Gansu Desert Control Research Institute, Lanzhou 730070, China
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Abstract   Estimation of the transpiration rate for a tree is generally based on sap flow measurements within the hydro-active stem xylem. In this study, radial variation of sap flow velocity (Js) was investigated at five depths of the xylem (1, 2, 3, 5 and 8 cm under the cambium) in three mature Xinjiang poplar (Populus alba L. var. pyramidalis) trees grown at the Gansu Minqin National Studies Station for Desert Steppe Ecosystem from May to October 2011. Thermal dissipation probes of various lengths manufactured according to the Granier’s design were installed into each tree for simultaneous observation of the radial patterns of Js through the xylem. The radial patterns were found to fit the four-parameter GaussAmp equation. The peak Js was about 27.02±0.95 kg/(dm2•d) at approximately 3 to 5 cm deep from the cambium of the three trees,and the lowest Js appeared at 1 cm deep in most of the time. Approximately 50% of the total sap flow in Xinjiang poplar occurred within one-third of the xylem from its outer radius, whereas 90% of the total sap flow occurred within two-fifth of the xylem. In addition, the innermost point of the xylem (at 8-cm depth), which appeared as the penultimate sap flow in most cases during the study period, was hydro-active with Js,8 of 7.55±3.83 kg/(dm2•d). The radial pattern of Js was found to be steeper in midday than in other time of the day, and steeper diurnal fluctuations were recorded in June, July and August (the mid-growing season). Maximum differences between the lowest Js (Js,1 or Js,8 ) and the highest Js (Js,3 or Js,5) from May through October were 12.41, 17.35, 16.30, 18.52, 12.60 and 16.04 g/(cm2•h), respectively. The time-dependent changes of Js along the radial profile (except at 1-cm depth) were strongly related to the reference evapotranspiration (ET0). Due to significant radial variability of Js, the mean daily sap flow at the whole-tree level could be over-estimated by up to 29.69% when only a single probe at depth of 2 cm was used. However, the accuracy of the estimation of sap flow in Xinjiang poplar could be significantly improved using a correction coefficient of 0.885.

Key wordssoil bacteria      diversity      plantation age      denaturing gradient gel electrophoresis      Horqin Sandy Land     
Received: 02 August 2013      Published: 12 October 2014

This work was financially supported by the National Natural Science Foundation of China (31070628). We would like to thank ZhengGang GUO, Feng WANG, Feng DING and YongHua LI for their resourceful discussions and suggestions.

Corresponding Authors: HongZhong DANG     E-mail:
Cite this article:

HongZhong DANG, TianShan ZHA, JinSong ZHANG, Wei LI, ShiZeng LIU. Radial profile of sap flow velocity in mature Xinjiang poplar (Populus alba L. var. pyramidalis) in Northwest China. Journal of Arid Land, 2014, 6(5): 612-627.

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Allen R G, Pereira L S, Raes D, et al. 1998. Crop Evapotranspiration: Guidelines for Computing Crop Water Requirements. FAO Irrigation and Drainage Paper 56. Rome: Food and Agriculture Organization of the United Nations.

Ayutthaya S I N, Do F, Pannengpetch K, et al. 2010. Transient thermal dissipation method of xylem sap flow measurement: multi-species calibration and field evaluation. Tree Physiology, 30(1): 139–148.

Becker P. 1996. Sap flow in Bornean heath and dipterocarp forest trees during wet and dry periods. Tree Physiology, 16(1–2): 295–299.

Caylor K K, Dragoni D. 2009. Decoupling structural and environmental determinants of sap velocity: Part I. Methodological development. Agricultural and Forest Meteorology, 149(3): 559–569.

?ermák J, Nadezhdina N. 1998. Sapwood as the scaling parameter-defining according to xylem water content or radial pattern of sap flow? Annales des Sciences Forestières, 55(5): 509–521.

?ermák J, Nadezhdina N, Meiresonne L, et al. 2008. Scots pine root distribution derived from radial sap flow patterns in stems of large leaning trees. Plant and Soil, 305(1–2): 61–75.

Chang Z F, Han F G, Zhong S N. 2011. Response of desert climate change to global warming in Minqin, China. Journal of Desert Research, 31(2): 505–510.

Chen D Y, Wang Y K, Liu S Y, et al. 2014. Response of relative sap flow to meteorological factors under different soil moisture conditions in rainfed jujube (Ziziphus jujuba Mill.) plantations in semiarid Northwest China. Agricultural Water Management, 136: 23–33.

Chen L, Zhang Z, Li Z, et al. 2011. Biophysical control of whole tree transpiration under an urban environment in Northern China. Journal of Hydrology, 402(3): 388–400.

Cohen Y, Cohen S, Cantuarias-Aviles T, et al. 2008. Variations in the radial gradient of sap velocity in trunks of forest and fruit trees. Plant and Soil, 305(1–2): 49–59.

Delzon S, Sartore M, Granier A, et al. 2004. Radial profiles of sap flow with increasing tree size in maritime pine. Tree Physiology, 24(11): 1285–1293.

Do F, Rocheteau A. 2002. Influence of natural temperature gradients on measurements of xylem sap flow with thermal dissipation probes. 2. Advantages and calibration of a noncontinuous heating system. Tree Physiology, 22(9): 649–654.

Du S, Wang Y L, Kume T, et al. 2011. Sapflow characteristics and climatic responses in three forest species in the semiarid Loess Plateau region of China. Agricultural and Forest Meteorology, 151(1): 1–10.

Fernández J E, Palomo M J, D??az-Espejo A, et al. 2001. Heat-pulse measurements of sap flow in olives for automating irrigation: tests, root flow and diagnostics of water stress. Agricultural Water Management, 51(2): 99–123.

Fernández J E, Green S R, Caspari H W, et al. 2008. The use of sap flow measurements for scheduling irrigation in olive, apple and Asian pear trees and in grapevines. Plant and Soil, 305(1–2): 91–104.

Fiora A, Cescatti A. 2006. Diurnal and seasonal variability in radial distribution of sap flux density: implications for estimating stand transpiration. Tree Physiology, 26(9): 1217–1225.

Ford C R, Goranson C E, Mitchell R J, et al. 2004a. Diurnal and seasonal variability in the radial distribution of sap flow: predicting total stem flow in Pinus taeda trees. Tree Physiology, 24(9): 951–960.

Ford C R, McGuire M A, Mitchell R J, et al. 2004b. Assessing variation in the radial profile of sap flux density in Pinus species and its effect on daily water use. Tree Physiology, 24(3): 241–249.

Gartner B L, Meinzer F C. 2005. Structure-function relationships in sapwood water transport and storage. In: Holbroock N M, Zwieniecki M A. Vascular Transport in Plants. Oxford: Elsevier, 307–318.

Gebauer T, Horna V, Leuschner C. 2008. Variability in radial sap flux density patterns and sapwood area among seven cooccurring temperate broad-leaved tree species. Tree Physiology, 28(12): 1821–1830.

González-Altozano P, Pavel E, Oncins J, et al. 2008. Comparative assessment of five methods of determining sap flow in peach trees. Agricultural Water Management, 95(5): 503–515.

Gonzalez-Benecke C A, Martin T A, Cropper W P. 2011. Whole-tree water relations of co-occurring mature Pinus palustris and Pinus elliottii var. elliottii. Canadian Journal of Forest Research, 41(3): 509–523.

Granier A. 1985. A new method of sap flow measurement in tree stems. Annales des Sciences Forestières, 42(2): 193–200.

Granier A. 1987. Evaluation of transpiration in a Douglas-fir stand by means of sap flow measurements. Tree Physiology, 3(4): 309–320.

Guo S, Xu X, Yang Z, et al. 2011. Relationships between sap flow patterns of Ammopiptanthus mongolicus and environmental factors in desert areas. Acta Botanica Boreali-Occidentalia Sinica, 31(5): 1003–1010.

Hatton T J, Moore S J, Reece P H. 1995. Estimating stand transpiration in a Eucalyptus populnea woodland with the heat pulse method: measurement errors and sampling strategies. Tree Physiology, 15(4): 219–227.

Herbst M, Rosier P T, Morecroft M D, et al. 2008. Comparative measurements of transpiration and canopy conductance in two mixed deciduous woodlands differing in structure and species composition. Tree Physiology, 28(6): 959–970.

Hernández-Santana V, David T S, Martínez-Fernández J. 2008. Environmental and plant-based controls of water use in a Mediterranean oak stand. Forest Ecology and Management, 255(11): 3707–3715.

Horna V, Schuldt B, Brix S, et al. 2011. Environment and tree size controlling stem sap flux in a perhumid tropical forest of Central Sulawesi, Indonesia. Annals of Forest Science, 68(5): 1027–1038.

Hultine K, Nagler P, Morino K, et al. 2010. Sap flux-scaled transpiration by tamarisk (Tamarix spp.) before, during and after episodic defoliation by the saltcedar leaf beetle (Diorhabda carinulata). Agricultural and Forest Meteorology, 150(11): 1467–1475.

Hunt M A, Beadle C L. 1998. Whole-tree transpiration and water-use partitioning between Eucalyptus nitens and Acacia dealbata weeds in a short-rotation plantation in northeastern Tasmania. Tree Physiology, 18(8–9): 557–563.

Iida S, Tanaka T. 2010. Effect of the span length of Granier-type thermal dissipation probes on sap flux density measurements. Annals of Forest Science, 67(4): 408–417.

James S A, Clearwater M J, Meinzer F C, et al. 2002. Heat dissipation sensors of variable length for the measurement of sap flow in trees with deep sapwood. Tree Physiology, 22(4): 277–283.

Jiménez M S, Nadezhdina N, ?ermák J, et al. 2000. Radial variation in sap flow in five laurel forest tree species in Tenerife, Canary Islands. Tree Physiology, 20(17): 1149–1156.

Köstner B, Biron P, Siegwolf R, et al. 1996. Estimates of water vapor flux and canopy conductance of Scots pine at the tree level utilizing different xylem sap flow methods. Theoretical and Applied Climatology, 53(1–3): 105–113.

Krauss K W, Young P J, Chambers J L, et al. 2007. Sap flow characteristics of neotropical mangroves in flooded and drained soils. Tree Physiology, 27(5): 775–783.

Kravka M, Krejzar T, ?ermák J. 1999. Water content in stem wood of large pine and spruce trees in natural forests in central Sweden. Agricultural and Forest Meteorology, 98–99: 555–562.

Kubota M, Tenhunen J, Zimmermann R, et al. 2005. Influences of environmental factors on the radial profile of sap flux density in Fagus crenata growing at different elevations in the Naeba Mountains, Japan. Tree Physiology, 25(5): 545–556.

Kumagai T, Aoki S, Shimizu T, et al. 2007. Sap flow estimates of stand transpiration at two slope positions in a Japanese cedar forest watershed. Tree Physiology, 27(2): 161–168.

López-Bernal Á, Alcántara E, Testi L, et al. 2010. Spatial sap flow and xylem anatomical characteristics in olive trees under different irrigation regimes. Tree Physiology, 30(12): 1536–1544.

Lu P, Müller W J, Chacko E K. 2000. Spatial variations in xylem sap flux density in the trunk of orchard-grown, mature mango trees under changing soil water conditions. Tree Physiology, 20(10): 683–692.

Lu P, Urban L, Zhao P. 2004. Granier’s thermal dissipation probe (TDP) method for measuring sap flow in trees: theory and practice. Acta Botanica Sinica, 46(6): 631–646.

Lüttschwager D, Remus R. 2007. Radial distribution of sap flux density in trunks of a mature beech stand. Annals of Forest Science, 64(4): 431–438.

Mahjoub I, Masmoudi M M, Lhomme J P, et al. 2009. Sap flow measurement by a single thermal dissipation probe: exploring the transient regime. Annals of Forest Science, 66(6): 608P1–608 P7.

McCulloh K A, Winter K, Meinzer F C, et al. 2007. A comparison of daily water use estimates derived from constant-heat sap-flow probe values and gravimetric measurements in pot-grown saplings. Tree Physiology, 27(9): 1355–1360.

Meinzer F C, James S A, Goldstein G. 2004. Dynamics of transpiration, sap flow and use of stored water in tropical forest canopy trees. Tree Physiology, 24(8): 901–909.

Nadezhdina N, ?ermák J, Ceulemans R. 2002. Radial patterns of sap flow in woody stems of dominant and understory species: scaling errors associated with positioning of sensors. Tree Physiology, 22(13): 907–918.

Nadezhdina N, ?ermák J, Meiresonne L, et al. 2007a. Transpiration of Scots pine in Flanders growing on soil with irregular substratum. Forest Ecology and Management, 243(1): 1–9.

Nadezhdina N, Nadezhdin V, Ferreira M I, et al. 2007b. Variability with xylem depth in sap flow in trunks and branches of mature olive trees. Tree Physiology, 27(1): 105–113.

Nadezhdina N, Ferreira M I, Silva R, et al. 2008. Seasonal variation of water uptake of a Quercus suber tree in Central Portugal. Plant and Soil, 305(1–2): 105–119.

Nourtier M, Chanzy A, Granier A, et al. 2011. Sap flow measurements by thermal dissipation method using cyclic heating: a processing method accounting for the non-stationary regime. Annals of Forest Science, 68(7): 1255–1264.

Oguntunde P G, Oguntuase A M. 2007. Influence of environmental factors on the sap flux density of mango trees under rain-fed cropping systems in West Africa. International Journal of Plant Production, 1(2): 179–188.

Pereira A R, Green S, Nova V N A. 2006. Penman–Monteith reference evapotranspiration adapted to estimate irrigated tree transpiration. Agricultural Water Management, 83(1–2): 153–161.

Phillips N, Oren R, Zimmermann R. 1996. Radial patterns of xylem sap flow in non-, diffuse- and ring-porous tree species. Plant, Cell & Environment, 19(8): 983–990.

Poyatos R, ?ermák J, Llorens P. 2007. Variation in the radial patterns of sap flux density in pubescent oak (Quercus pubescens) and its implications for tree and stand transpiration measurements. Tree Physiology, 27(4): 537–548.

Saveyn A, Steppe K, Lemeur R. 2008. Spatial variability of xylem sap flow in mature beech (Fagus sylvatica) and its diurnal dynamics in relation to microclimate. Botany, 86(12): 1440–1448.

Sevanto S, Hölttä T, Nikinmaa E. 2008. The effects of heat storage during low flow rates on the output of Granier-type sap-flow sensors. Acta Horticulturae, 846: 45–52.

Solomon S D, Qin M, Manning Z, et al. 2007. Climate Change 2007: the Physical Science Basis. Contribution of Working Group I Contribution to the Fourth Assessment Report of the Intergovermental Panel on Climate Change. New York: Cambridge University Press, 1–996.

Steppe K, De Pauw D J W, Doody T M, et al. 2010. A comparison of sap flux density using thermal dissipation, heat pulse velocity and heat field deformation methods. Agricultural and Forest Meteorology, 150(7–8): 1046–1056.

Tateishi M, Kumagai T, Suyama Y, et al. 2010. Differences in transpiration characteristics of Japanese beech trees, Fagus crenata, in Japan. Tree Physiology, 30(6): 748–760.

Tognetti R, d’Andria R, Morelli G, et al. 2004. Irrigation effects on daily and seasonal variations of trunk sap flow and leaf water relations in olive trees. Plant and Soil, 263(1): 249–264.

Tyree M T, Zimmermann M H. 2002. Xylem Structure and the Ascent of Sap. Berlin: Springer-Verlag, 1–283.

Wullschleger S D, King A W. 2000. Radial variation in sap velocity as a function of stem diameter and sapwood thickness in yellow-poplar trees. Tree Physiology, 20(8): 511–518.

Wullschleger S D, Hanson P, Todd D. 2001. Transpiration from a multi-species deciduous forest as estimated by xylem sap flow techniques. Forest Ecology and Management, 143(1): 205–213.

Xu X Y, Tong L, Li F S, et al. 2011. Sap flow of irrigated Populus alba var. pyramidalis and its relationship with environmental factors and leaf area index in an arid region of Northwest China. Journal of Forest Research, 16(2): 144–152.

Zang D, Beadle C L, White D A. 1996. Variation of sapflow velocity in Eucalyptus globulus with position in sapwood and use of a correction coefficient. Tree Physiology, 16(8): 697–703.
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