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| Temporal Variation in Sap-Flux-Scaled Transpiration and Cooling Effect of a Subtropical Schima superba Plantation in the Urban Area of Guangzhou |
| ZHU Li-wei , ZHAO Ping |
| Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, P.R.China |
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摘要 Agriculture could suffer the water stress induced by climate change. Because climate warming affects global hydrological cycles, it is vital to explore the effect of tree transpiration, as an important component of terrestrial evapotranspiration, on the environment. Thermal dissipation probes were used to measure xylem sap flux density of a Schima superba plantation in the urban area of Guangzhou City, South China. Stand transpiration was calculated by mean sap flux density times total sapwood area. The occurrence of the maximum sap flux density on the daily scale was later in wet season than in dry season. The peak of daily sap flux density was the highest of 59 g m-2 s-1 in July and August, and the lowest of 28 g m-2 s-1 in December. In the two periods (November 2007-October 2008 and November 2008-October 2009), the stand transpiration reached 263.2 and 291.6 mm, respectively. During our study period, stand transpiration in wet season (from April to September) could account for about 58.5 and 53.8% of the annual transpiration, respectively. Heat energy absorbed by tree transpiration averaged 1.4×108 and 1.6×108 kJ per month in this Schima superba plantation with the area of 2 885 m2, and temperature was reduced by 4.3 and 4.7°C s-1 per 10 m3 air.
Abstract Agriculture could suffer the water stress induced by climate change. Because climate warming affects global hydrological cycles, it is vital to explore the effect of tree transpiration, as an important component of terrestrial evapotranspiration, on the environment. Thermal dissipation probes were used to measure xylem sap flux density of a Schima superba plantation in the urban area of Guangzhou City, South China. Stand transpiration was calculated by mean sap flux density times total sapwood area. The occurrence of the maximum sap flux density on the daily scale was later in wet season than in dry season. The peak of daily sap flux density was the highest of 59 g m-2 s-1 in July and August, and the lowest of 28 g m-2 s-1 in December. In the two periods (November 2007-October 2008 and November 2008-October 2009), the stand transpiration reached 263.2 and 291.6 mm, respectively. During our study period, stand transpiration in wet season (from April to September) could account for about 58.5 and 53.8% of the annual transpiration, respectively. Heat energy absorbed by tree transpiration averaged 1.4×108 and 1.6×108 kJ per month in this Schima superba plantation with the area of 2 885 m2, and temperature was reduced by 4.3 and 4.7°C s-1 per 10 m3 air.
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Received: 17 October 2012
Accepted:
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| Fund: This study was financially supported by the National Natural Science Foundation of China (41030638, 31170673 and 41275169) and the Provincial Natural Science Foundation of Guangdong, China (S2012020010933). |
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Corresponding Authors:
Correspondence ZHAO Ping, Tel: +86-20-37252881, E-mail: zhaoping@scib.ac.cn
E-mail: zhaoping@scib.ac.cn
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Cite this article:
ZHU Li-wei , ZHAO Ping.
2013.
Temporal Variation in Sap-Flux-Scaled Transpiration and Cooling Effect of a Subtropical Schima superba Plantation in the Urban Area of Guangzhou. Journal of Integrative Agriculture, 12(8): 1350-1356.
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| [1]Barber S A. 1995. Soil Nutrient Bioavailability: A MechanisticApproach. John Wiley & Sons, New York. p. 398.Cienciala E, Kuèera J, Malmer A. 2000. Tree sap flow andstand transpiration of two Acacia mangium plantationsin Sabah, Borneo. Journal of Hydrology, 236, 109-120[2]Cook G D, Dixon J R, Leopold A C. 1964. Transpiration: itseffects on plant temperature. Science, 144, 546-547[3]Du S, Wang Y L, Kume T, Zhang J G, Otsuki K, YamanakaN, Liu G B. 2011. Sap flow characteristics and climaticresponses in three forest species in the semiarid LoessPlateau region of China. Agricultural and ForestMeteorology, 151, 1-10[4]Garrett H E G. 1997. Agroforestry practice and police in theUnited States of America. Forestry Ecology andManagement, 91, 5-15[5]Granier A. 1987. Evaluation of transpiration in a Douglasfirstand by means of sap flow measurements. TreePhysiology, 3, 309-320[6]Granier A, Breda N. 1996. Modeling canopy conductanceand stand transpiration of an oak forest from sap flowmeasurements. Annals of Forest Science, 53, 537-546[7]Huang Y Q, Li X K, Zhang Z F, He C X, Zhao P, You Y M,Mo L. 2011. Seasonal changes in Cyclobalanopsisglauca transpiration and canopy stomatal conductanceand their dependence on subterranean water andclimatic factors in rocky karst terrain. Journal ofHydrology, 402, 135-143[8]Infante J M, Domingo F, Fernandezales R, Joffre R, RambalS. 2003. Quercus ilex transpiration as affected by aprolonged drought period. Biologia Plantarum, 46, 49-55[9]Köstner B, Schulze E D, Kelliher F M, Hollinger D Y, ByersJ N, Hunt J E, McSeveny T M, Meserth R, Weir P L.1992. Transpiration and canopy conductance in apristine broad-leaved forest of Nothofagus: an analysisof sap flow and eddy correlation measurements.Oecologia, 91, 350-359[10]Martin T A, Brown K J, Cermak J, Ceulemans R, Kucera J,Meinzer F C, Rombold J S, Sprugei D G, Hinckley T M.1997. Crown conductance and tree and standtranspiration in a second growth Abies amabilis forest.Canadian Journal of Forest Research, 27, 797-808[11]Milly P C D, Dunne K A, Vecchia A V. 2005. Global patternof trends in streamflow and water availability in achanging climate. Nature, 438, 347-350[12]Moorhead D J, Dickens E D. 2012. Agroforestry: a profitableland use. An overview of the 12th North AmericanAgroforestry Conference. Agroforest System, 86, 299-302[13]Nakazato T, Inagaki T. 2012. Analysis of plant function asbio-thermal-conditioner using Pothos (Epipremnumaureum). Thermochimica Acta, 532, 49-55[14]Oki T, Kanae S. 2006. Global hydrological cycles and worldwater resources. Science, 313, 1068-1072[15]Oren R, Ewers B E, Todd P, Phillips N, Katul G. 1998. Waterbalance delineates the soil layer in which moistureaffects canopy conductance. Ecological Application,8, 990-1002[16]Pataki D E, Oren R, Smith W K. 2000. Sap flux of cooccurringspecies in a western subalpine forest duringseasonal soil drought. Ecology, 81, 2557-2566[17]Peng K, Ou Y H, Zhu B. 2004. Nitrogen balances andappraisals in agroforestry ecosystem: a case study inYanTing experiment station. Resources andEnvironment in the Yangtze Basin, 13, 252-257[18]Pra ák J, Šír M, Tesar M. 1994. Estimation of planttranspiration from meteorological data under conditionsof sufficient soil moisture. Journal of Hydrology, 162,409-427[19]Rose M A, Beattie D J, White J W. 1994. Oscillations ofwhole-plant transpiration in ‘moonlight’ rose. Journalof the American Society for Horticulture Science, 119,439-445[20]Schultz R C, Colletti J P, Faltonson R R. 1995. Agroforestryopportunities for the United States of America.Agroforestry System, 31, 117-132[21]Suzuki H, Misaka I, Murano N, Tashiro Y. 2005. TheResearch on the Improvement Effect of ThermalEnvironment by the Wall Greening. vol. 68. TheJapanese Institute of Landscape Architecture, Japan.pp. 503-508[22](in Japanese)Tekken V, Kropp J P. 2012. Climate-driven or humaninduced:inducating severe water scarcity in theMoulouya river basin (Morocco). Water, 4, 959-982[23]Wullschleger S D, Wilson K B, Hanson P J. 2000.Environmental control of whole-plant transpiration,canopy conductance and estimates of the decouplingcoefficient for large red maple trees. Agricultural andForest Meteorology, 104, 157-168[24]Wullschleger S D, Hanson P J, Todd D E. 2001. Transpirationfrom a multi-species deciduous forest as estimated byxylem sap flow techniques. Forest Ecology andManagement, 143, 205-213[25]Xia Q, He B H, Xie Z, Wei Y Z. 2006. Study on soil physicaland chemical properties of agroforestry of purple soil.Journal of Soil and Water Conservation, 20, 86-89[26](inChinese)Xie G L. 2011. Research on the farmland ecological safetyin Guangzhou. Guangdong Agricultural Sciences, 22,152-154 (in Chinese)[27]Yamamoto N, Kawashima S, Murakami A, Watanabe S. 2004.Effects of the Vegetation Density and the Irrigation ofRooftop Greening with Sedum Mexicanum Britton onLocal Thermal Conditions and Heat Flux Balance.vol. 67. The Japanese Institute of LandscapeArchitecture, Japan. pp. 443-446 (in Japanese)[28]Yu Q G, Jin Y, Geng S. 2012. Impact of climate and land-usechanges on water security for agriculture in NorthernChina. Journal of Integrative Agriculture, 11, 144-150[29]Zhao P, Rao X Q, Ma L, Cai X A, Zeng X P. 2006. Sap flowscaledstand transpiration and canopy stomatalconductance in an Acacia mangium forest. Journal ofPlant Ecology, 30, 655-665. (in Chinese) |
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