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[1]LI Shao-ning,CHEN Bo,LU Shao-wei,et al.Variation of Stem Sap Flow and Water Consumption of Populus in Spring and Summer[J].Research of Soil and Water Conservation,2013,20(03):167-171.

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Variation of Stem Sap Flow and Water Consumption of Populus in Spring and Summer

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 20 Number of periods: 2013 03 Page number: 167-171 Column: Public date: 2013-06-28

Title:: Variation of Stem Sap Flow and Water Consumption of Populus in Spring and Summer

Author(s):: LI Shao-ning¹, CHEN Bo², LU Shao-wei¹, PAN Qing-hua¹, ZHANG Yu-ping¹, WANG Hua¹; 1. Forestry and Pomology Institute, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100093, China;
2. College of Forestry, Agricultural University of Hebei, Baoding, Hebei 071000, China

Keywords:: planted poplar; thermal dissipation probe; stem sap flow; water consumption

CLC:: S715.4

DOI:: -

Abstract:: The environmental factors and stem sap flow dynamics of planted poplar (Populus×euramericanacv. “74/76”) were investigated through March to July 2011 with thermal dissipation probe (TDP) and the data from automatic weather station (HOBO). Results showed that the daily changes of sap flow exhibited single peak pattern both in spring and summer. Daily sap flow started 3 h earlier in summer than in spring, reached peak 1 h later in summer than in spring, and rapid decrease was 2 h later in summer than that in spring. Both maximum and average values of sap flow velocity were lower in summer than that in spring. Monthly sap flow velocity varied between 5.31 cm³/h and 51.31 cm³/h from March to July. The average sap flow (47.92 cm³/h) was higher in summer than that in spring (35.72 cm³/h). Daily water consumption significantly correlated with trunk diameter at breast height and sapwood area with the correlation coefficients of 0.956 and 0.984, respectively. Seasonal sap flow variation of poplar indicated that summer was the key period for water management due to high transpiration.

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