CROP COEFFICIENT AND WATER RELATIONSHIPS OF COFFEE CATUCAÍ CULTIVAR UNDER TWO SYSTEMS OF IRRIGATION MANAGEMENT

Authors

  • Luiz Fernando Coutinho de Oliveira
  • Ruth Zago Oliveira
  • Lucas Bernardes Borges
  • Tiago Roberto Wehr
  • Robson Bonomo

Keywords:

Evapotranspiration, diffusion resistance, leaf water potential

Abstract

The objective of this study was to determine the crop coefficient (kc), diffusion resistance and leaf water potential coffee, Catucaí cultivar, in blooming and grain formation phases, submitted to two irrigation system management. The coffee evapotranspiration was determined by soil water balance, and crop evapotranspiration was assessed by Penman-Monteith (FAO-56) method. The irrigation application times were determined in two management systems: based on the percentage wetted area (P), and based on the location coefficient (Kl). The results allowed to conclude that the irrigation management using the location coefficient provided an increase of the irrigation application time, and, consequently, increasing the irrigation depth and the crop coefficient values, which reached the mean of 1.12. For the management system based on the percentage wetted area, the mean value of the crop coefficient, in the appraised period, was 1.06. The mean diffusion resistance and leaf water potential were lower when the management system was adopted with base in Kl, which provided an increase of the transpiration and, consequently, of kc.

KEY-WORDS: Evapotranspiration; diffusion resistance; leaf water potential.

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Author Biography

Luiz Fernando Coutinho de Oliveira

Universidade Federal de Lavras, Departamento de Engenharia / Universidade Federal de Goiás (UFG). E-mail: lfco@pq.cnpq.br

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Published

2007-10-15

How to Cite

OLIVEIRA, L. F. C. de; OLIVEIRA, R. Z.; BORGES, L. B.; WEHR, T. R.; BONOMO, R. CROP COEFFICIENT AND WATER RELATIONSHIPS OF COFFEE CATUCAÍ CULTIVAR UNDER TWO SYSTEMS OF IRRIGATION MANAGEMENT. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], Goiânia, v. 37, n. 3, p. 154–162, 2007. Disponível em: https://revistas.ufg.br/pat/article/view/1855. Acesso em: 24 nov. 2024.

Issue

v. 37, n. 3, Jul./Sep. 2007

Section

Research Article

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