Water storage in wetted strips under irrigated coffee trees with different criteria of irrigation management

Engenharia Agrícola

Alberto Colombo¹  Lívia A. Alvarenga¹  Myriane S. Scalco²  Randal C. Ribeiro²  Giselle F. Abreu² 

[1] ,Universidade Federal de Lavras Setor de Engenharia de Água e Solo Departamento de EngenhariaLavras MG

关键词: irrigated coffee planting;    tensiometers;    soil water storage;    cafeicultura irrigada;    tensiômetros;    armazenamento de água no solo;   

DOI  :  10.1590/S0100-69162013000200004

来源: SciELO

【 摘 要 】

The increasing demand for water resources accentuates the need to reduce water waste through a more appropriate irrigation management. In the particular case of irrigated coffee planting, which in recent years presented growth with the predominance of drip irrigation, the improvement of drip irrigation management techniques is a necessity. The proper management of drip irrigation depends on the knowledge of the spatial pattern of soil moisture distribution inside the wetted strip formed under the irrigation lines. In this study, grids of 24 tensiometers were used to determine the water storage within the wetted strip formed under drippers, with a 3.78 L h-1 discharge, evenly spaced by 0.4 m, subjected to two different management criteria (fixed irrigation interval and 60 kPa tension). Estimates of storage based on a one-dimensional analysis, that only considers depth variations, were compared with two-dimensional estimates. The results indicate that for high-frequency irrigation the one-dimensional analysis is not appropriate. However, under less frequent irrigation, the two-dimensional analysis is dispensable, being the one-dimensional sufficient for calculating the water volume stored in the wetted strip.

【 授权许可】

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