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

Abstract

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.

CALIBRATION OF THE THERMAL DISSIPATION PROBE FOR ATEMOYA: (Annona squamosa x A. cherimola)

“…Among these, we highlight the thermal methods, which estimate the flow of sap based on the heat supply to the stem and the detection of convective heat transfer by the sap (Fuchs et al, 2017). Because they are easy to install and use and inexpensive, these methods have been used to quantify water use in various crops such as mango (Cotrim et al, 2019), banana (Hai-Jun et al, 2015, African mahogany (Sérvulo et al, 2017), and apple (Bhusal et al, 2019).…”