Transpiration in mango using Granier method

Revista Brasileira de Engenharia Agrícola e Ambiental

Coelho Filho, Mauricio A.³  Paz, Vital P. S.²  Vellame, Lucas M.¹ 

[1] USP, Piracicaba;UFRB, Cruz das Almas;Embrapa Mandioca e Fruticultura Tropical, Cruz das Almas

关键词: heat dissipation;    sap flow;    thermal gradients;    xylem;    Mangifera indica L;   

DOI  :  10.1590/S1415-43662009000500002

学科分类：农业科学（综合）

来源: Universidade Federal de Campina Grande * Centro de Ciencias e Tecnologia

【 摘 要 】

The purpose of this study was to evaluate Granier's method (heat dissipation probe) for mango crop and to determine the viability of its use under field conditions and to adjust the equation of sap flow (SF) on the basis of lysimeter measurements. The work started with three seedlings of the variety Tommy Atkins cultivated in recipients that were placed on a weighing platforms which functioned as lysimeters. The sapwood area (SA) was determined through pigment application. Transpiration measurement by lysimeter were conducted in recipients and sap flow estimates with heat dissipation probe (HDP). This probe and a stem heat balance sensor were installed in one branch of the adult plant. The results showed that, using original coefficients of Granier's equation, the method underestimated sap flow by 31% daily in relation to the transpiration. Modifying empirical parameters of equation FS = 0,00017k1,231AS, the mean error was of -1.4% with good precision (R2 = 0.89). HDP and stem heat balance method showed good agreement.

【 授权许可】

CC BY-NC