博伦气象发布HPV 植物茎流传感器/植物液流计新品
HPV 茎流量传感器/Sap Flow SensorHPV茎流量传感器是一款校准型、低成本的热脉冲液流传感器,输出校准液流量、热速、茎水含量、茎温等数据,功耗低,内置加热控制,同时改善了传统的加热方式,其原理采用双方法(DMA)热脉冲法,测量范围:-200~+1000cm/hr(热流速度)或-100~+2000cm3/cm2/hr (茎流通量密度),可广泛用于于茎流量监测、植物茎流蒸发计算、植物茎流蒸腾量、植物灌溉等植物茎流是树木内部的“水”运动,而蒸腾是从叶片通过光合作用蒸发流出的水分。树液流量和蒸腾量之间有很强的关联性,通常理解是同一回事。但是,严格地说,它们是不同的,这体现在它们是如何被测量的。SAP流量以L/hr(或每天、每周等)为单位进行测量。蒸腾量以每小时、每天、每星期等毫米(mm)为单位测量。 蒸散量=蒸腾量+蒸发量 蒸腾量以毫米为测量单位,可与降雨量以毫米计作比较。随着时间的推移,降雨量(水输入)应与蒸腾量(输出)相匹配。如果蒸腾作用更高,通常是树木作物的蒸腾作用,那么这种差异必须通过灌溉来弥补。 蒸发量(evaporation),蒸发量是指在一定时段内,由土壤或水中的水分经蒸发而散布到空中的量。1mm(降雨量)=1㎡地面1kg水1mm(蒸腾量)=1㎡叶面积的1升树液流量(水) 例如:在果园和葡萄园等有管理的树木作物系统中,蒸发量与蒸腾量相比非常小。因此,为了简化测量,通常忽略蒸发量,将蒸腾量取为平均蒸散量(ETo)。 技术指标测量范围:-200~+1000cm/hr(热流速度)分辨率:0.001cm/hr准确度:±0.1cm/hr探针尺寸:φ1.3mm*L30mm温度位置:外10mm,内20mm针距:6mm探针材质:316不锈钢温度范围:-30~+70℃响应时间:200ms加热电阻:39Ω,400J/m电源:12V DC电流:空闲5mA, 测量茎流量传感器参考文献:1. Kim, H.K. Park, J. Hwang, I. Investigating water transport through the xylem network in vascular plants.J. Exp. Bot. 2014, 65, 1895–1904. [CrossRef] [PubMed]2. Steppe, K. Vandegehuchte, M.W. Tognetti, R. Mencuccini, M. Sap flow as a key trait in the understanding of plant hydraulic functioning. Tree Physiol. 2015, 35, 341–345. [CrossRef] [PubMed]3. Vandegehuchte, M.W. Steppe, K. Sap-flux density measurement methods: Working principles andapplicability. Funct. Plant Biol. 2013, 40, 213–223. [CrossRef]4. Marshall, D.C. Measurement of sap flow in conifers by heat transport. Plant Physiol. 1958 , 33, 385–396.[CrossRef] [PubMed]5. Cohen, Y. Fuchs, M. Green, G.C. Improvement of the heat pulse method for determining sap flow in trees. Plant Cell Environ. 1981, 4, 391–397.[CrossRef]6. Green, S.R. Clothier, B. Jardine, B. Theory and practical application of heat pulse to measure sap flow.Agron. J. 2003, 95, 1371–1379. [CrossRef]7. Burgess, S.S.O. Adams, M.A. Turner, N.C. Beverly, C.R. Ong, C.K. Khan, A.A.H. Bleby, T.M. An improved heat-pulse method to measure low and reverse rates of sap flow in woody plants. Tree Physiol. 2001 , 21, 589–598. [CrossRef]8. Forster, M.A. How reliable are heat pulse velocity methods for estimating tree transpiration? Forests 2017 , 8, 350. [CrossRef]9. Bleby, T.M. McElrone, A.J. Burgess, S.S.O. Limitations of the HRM: Great at low flow rates, but no yet up to speed? In Proceedings of the 7th International Workshop on Sap Flow: Book of Abstracts, Seville, Spain, 22–24 October 2008.10. Pearsall, K.R. Williams, L.E. Castorani, S. Bleby, T.M. McElrone, A.J. Evaluating the potential of a novel dual heat-pulse sensor to measure volumetric water use in grapevines under a range of flow conditions. Funct. Plant Biol. 2014, 41, 874–883. [CrossRef]11. Clearwater, M.J. Luo, Z. Mazzeo, M. Dichio, B. An external heat pulse method for measurement of sap flow through fruit pedicels, leaf petioles and other small-diameter stems. Plant Cell Environ. 2009 , 32, 1652–1663.[CrossRef]12. Green, S.R. Romero, R. Can we improve heat-pulse to measure low and reverse flows? Acta Hortic. 2012 , 951, 19–29. [CrossRef]13. Green, S. Clothier, B. Perie, E. A re-analysis of heat pulse theory across a wide range of sap flows. Acta Hortic. 2009, 846, 95–104. [CrossRef]14. Ferreira, M.I. Green, S. Concei??o, N. Fernández, J. Assessing hydraulic redistribution with thecompensated average gradient heat-pulse method on rain-fed olive trees. Plant Soil 2018 , 425, 21–41.[CrossRef]15. Romero, R. Muriel, J.L. Garcia, I. Green, S.R. Clothier, B.E. Improving heat-pulse methods to extend the measurement range including reverse flows. Acta Hortic. 2012, 951, 31–38. [CrossRef]16. Testi, L. Villalobos, F. New approach for measuring low sap velocities in trees. Agric. Meteorol. 2009 , 149, 730–734. [CrossRef]17. Vandegehuchte, M.W. Steppe, K. Sapflow+: A four-needle heat-pulse sap flow sensor enabling nonempirical sap flux density and water content measurements. New Phytol. 2012, 196, 306–317. [CrossRef] [PubMed]18. Kluitenberg, G.J. Ham, J.M. Improved theory for calculating sap flow with the heat pulse method.Agric. For. Meteorol. 2004, 126, 169–173. [CrossRef]19. Vandegehuchte, M.W. Steppe, K. Improving sap-flux density measurements by correctly determiningthermal diffusivity, differentiating between bound and unbound water. Tree Physiol. 2012 , 32, 930–942.[CrossRef]20. Looker, N. Martin, J. Jencso, K. Hu, J. Contribution of sapwood traits to uncertainty in conifer sap flow as estimated with the heat-ratio method. Agric. For. Meteorol. 2016, 223, 60–71. [CrossRef]21. Edwards, W.R.N. Warwick, N.W.M. Transpiration from a kiwifruit vine as estimated by the heat pulsetechnique and the Penman-Monteith equation. N. Z. J. Agric. Res. 1984, 27, 537–543. [CrossRef]22. Becker, P. Edwards, W.R.N. Corrected heat capacity of wood for sap flow calculations. Tree Physiol 1999 , 19, 767–768. [CrossRef]23. Hogg, E.H. Black, T.A. den Hartog, G. Neumann, H.H. Zimmermann, R. Hurdle, P.A. Blanken, P.D. Nesic, Z. Yang, P.C. Staebler, R.M. et al. A comparison of sap flow and eddy fluxes of water vapor from aboreal deciduous forest. J. Geophys. Res. 1997, 102, 28929–28937. [CrossRef]24. Barkas, W.W. Fibre saturation point of wood. Nature 1935, 135, 545. [CrossRef]25. Kollmann, F.F.P. Cote, W.A., Jr. Principles of Wood Science and Technology: Solid Wood Springer: Berlin Heidelberg, Germany, 1968.26. Swanson, R.H. Whitfield, D.W.A. A numerical analysis of heat pulse velocity and theory. J. Exp. Bot. 1981 ,32, 221–239. [CrossRef]27. Barrett, D.J. Hatton, T.J. Ash, J.E. Ball, M.C. Evaluation of the heat pulse velocity technique for measurement of sap flow in rainforest and eucalypt forest species of south-eastern Australia. Plant Cell Environ. 1995 , 18, 463–469. [CrossRef]28. Biosecurity Queensland. Environmental Weeds of Australia for Biosecurity Queensland Edition Queensland Government: Brisbane, Australia, 2016.29. Steppe,K. de Pauw, D.J.W. Doody, T.M. Teskey, R.O. A comparison of sap flux density using thermaldissipation, heat pulse velocity and heat field deformation methods. Agric. For. Meteorol. 2010 , 150, 1046–1056. [CrossRef]30. López-Bernal, A. Testi, L. Villalobos, F.J. A single-probe heat pulse method for estimating sap velocity in trees. New Phytol. 2017, 216, 321–329. [CrossRef] [PubMed]31. Forster, M.A. How significant is nocturnal sap flow? Tree Physiol. 2014, 34, 757–765. [CrossRef] [PubMed]32. Cohen, Y. Fuchs, M. Falkenflug, V. Moreshet, S. Calibrated heat pulse method for determining water uptake in cotton. Agron. J. 1988, 80, 398–402. [CrossRef]33. Cohen, Y. Takeuchi, S. Nozaka, J. Yano, T. Accuracy of sap flow measurement using heat balance and heat pulse methods. Agron. J. 1993, 85, 1080–1086. [CrossRef]34. Lassoie, J.P. Scott, D.R.M. Fritschen, L.J. Transpiration studies in Douglas-fir using the heat pulse technique. For. Sci. 1977, 23, 377–390.35. Wang, S. Fan, J. Wang, Q. Determining evapotranspiration of a Chinese Willow stand with three-needleheat-pulse probes. Soil Sci. Soc. Am. J. 2015, 79, 1545–1555. [CrossRef]36. Bleby, T.M. Burgess, S.S.O. Adams, M.A. A validation, comparison and error analysis of two heat-pulse methods for measuring sap flow in Eucalyptus marginata saplings. Funct. Plant Biol. 2004 , 31, 645–658.[CrossRef]37. Madurapperuma, W.S. Bleby, T.M. Burgess, S.S.O. Evaluation of sap flow methods to determine water use by cultivated palms. Environ. Exp. Bot. 2009, 66, 372–380. [CrossRef]38. Green, S.R. Measurement and modelling the transpiration of fruit trees and grapevines for irrigationscheduling. Acta Hortic. 2008, 792, 321–332. [CrossRef]39. Intrigliolo, D.S. Lakso, A.N. Piccioni, R.M. Grapevine cv. ‘Riesling’ water use in the northeastern UnitedStates. Irrig.Sci. 2009, 27, 253–262. [CrossRef]40. Eliades, M. Bruggeman, A. Djuma, H. Lubczynski, M. Tree water dynamics in a semi-arid, Pinus brutiaforest. Water 2018, 10, 1039. [CrossRef]