scholarly journals Comparison of Tissue Heat Balance- and Thermal Dissipation-Derived Sap Flow Measurements in Ring-Porous Oaks and a Pine

2012 ◽  
Vol 3 ◽  
Author(s):  
Heidi J. Renninger ◽  
Karina V. R. Schäfer
Keyword(s):  
Heat Balance ◽  
Sap Flow ◽  
Thermal Dissipation ◽  
Flow Measurements ◽  
Sap Flow Measurements

Determination of zero-flow for the thermal dissipation method of sap flow measurements in Mediterranean climates

2020 ◽  
pp. 29-36
Author(s):  
S. Haberstroh ◽  
M.C. Caldeira ◽  
R. Lobo-do-Vale ◽  
M. Dubbert ◽  
C. Werner
Keyword(s):  
Sap Flow ◽  
Thermal Dissipation ◽  
Flow Measurements ◽  
Sap Flow Measurements ◽  
Zero Flow

scholarly journals Sap flow in ‘Tommy Atkins’ mango trees under regulated deficit irrigation

2019 ◽  
Vol 14 (3) ◽  
pp. 1
Author(s):  
Carlos Elizio Cotrim ◽  
Marcelo Rocha dos Santos ◽  
Maurício Antônio Coelho Filho ◽  
Eugênio Ferreira Coelho ◽  
João Abel da Silva
Keyword(s):  
Sap Flow ◽  
Deficit Irrigation ◽  
Irrigation Management ◽  
Thermal Dissipation ◽  
Phase Iii ◽  
Regulated Deficit Irrigation ◽  
Flow Measurements ◽  
Mango Tree ◽  
Irrigated Perimeter ◽  
Sap Flow Measurements

Knowledge of transpiration is of fundamental importance for improving irrigation management. This study measured sap flow of the 'Tommy Atkins' mango tree using Granier’s thermal dissipation probe method under regulated deficit irrigation. The work was conducted in a 10-year-old ‘Tommy Atkins’ mango orchard, irrigated by micro sprinkler, located in the Irrigated Perimeter of Ceraíma, in Guanambi, Bahia, Brazil. Sap flow measurements were carried out on three consecutive days in plants under regulated deficit irrigation, with reductions of 30 and 60% of crop evapotranspiration in three phases of fruit development; beginning of flowering to early fruit growth (Phase I), fruit expansion (Phase II) and physiological maturation of fruits (Phase III). Regulated deficit irrigation led to reduced sap flow in ‘Tommy Atkins’ mango tree.

scholarly journals Rootstock-induced Differences in Sap Flow of `Granny Smith' Apple

HortScience ◽  
1994 ◽  
Vol 29 (10) ◽  
pp. 1120-1123 ◽  
Author(s):  
Ismail A. Hussein ◽  
Marshall J. McFarland
Keyword(s):  
Steady State ◽  
Water Stress ◽  
Heat Balance ◽  
Sap Flow ◽  
Flow Measurements ◽  
Stress Treatment ◽  
State Heat ◽  
Daily Water ◽  
Steady State Heat ◽  
Sap Flow Measurements

Two-year-old, greenhouse-grown, potted `Granny Smith' apple (Malus domestica Borkh.) trees grafted on seedling, M.7 EMLA, or Mark rootstock were subjected to water stress by withholding irrigation for three successive days. Sap flow rates were measured with steady-state, heat-balance stem gauges; daily water use was measured with an electronic balance; and instantaneous transpiration was measured with a diffusion porometer. Differences in the sap flow among the three rootstocks were observed by the third day of stress treatment. The cumulative sap flow over the 3-day stress period was higher for trees on seedling and M.7 EMLA rootstocks than for those on Mark. Cumulative sap flow was reduced on the second and third days of water stress compared to sap flow in the control. The diurnal peak of sap flow rate was flattened on the second and third days of stress compared to the pattern for the control and first day of stress treatment. In general, the trees on the standard rootstock (seedling) were least affected by the water stress; trees on the full dwarf rootstock (Mark) were the most affected. Good agreement between cumulative sap flow measurements and gravimetric measurements indicates that the steady-state, heat-balance method is practical and accurate.

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