Balanço hídrico e avaliação da chuva na cultura do cafeeiro / Water balance and rainfall evaluation in a coffee crop
AUTOR(ES)
Isabeli Pereira Bruno
DATA DE PUBLICAÇÃO
2007
RESUMO
The coffee plant has its growth and development strongly influenced by the water regime, either in favor or depressing the final yield, all depending on phonological stage. In order to have a better knowledge of the water requirement of the coffee crop, and also to have a more efficient irrigation management, a very useful tool is the water balance, which can be obtained through direct field measurements or through model estimation. The first are laborious and costly, while the second are simple and fast to be obtained. However, models are frequently applied to agronomic or environmental conditions that differ from those in which they were developed. One of the most important components for the calculation of water balances is the rainfall, and the precision of its measurement determines the confidence of the balances, indicating the need of taking into account rainfall variability, which is neglected in most cases. This study makes a comparison between climatologic water balances, based on the estimation of the evapotranspiration through the methods of Thornthwaite and Penman-Monteith, obtained though a computational program, and field water balances of a coffee crop. A second part of this study deals with the ideal number of pluviometers to be used in small areas, and the comparison of these measurements with two automatic meteorological stations. Both studies were carried out in Piracicaba, SP, Brazil, with data collected during 2003 - 2005.
ASSUNTO(S)
café rainfall coffee evapotranspiration Água do solo chuva evapotranspiração balanço hídrico water balances soil water precipitação atmosférica
Documentos Relacionados
- Irrigação, balanço hídrico climatológico e uso eficiente da água na cultura de café
- Variabilidade dos componentes do balanço hídrico: um estudo de caso em uma cultura do cafeeiro (Coffea arabica L.) no Brasil
- Disponibilidade de água no solo para a cultura do café no Planalto de Conquista - BA: análise dos componentes do balanço hídrico
- Balanço hídrico e energético de um sistema predial de aproveitamento de água de chuva
- Software to estimate crop yield by simulating irrigation using sequential water balance.