Data/hora: 05/06/2024 08:18:10

Provedor de dados: | Engenharia Agrícola
País: | Brazil
Título: | Evapotranspiration and crop coefficient for potato in organic farming
Autores: | Carvalho,Daniel F. de; Silva,Dione G. da; Rocha,Hermes S. da; Almeida,Wilk S. de; Sousa,Eraldo da S.
Data: | 2013-02-01
Ano: | 2013
Palavras-chave: | Solanum tuberosum L.; Time domain reflectometry; Irrigation.
Resumo: | The aim of this study was to quantify the water consumption and the crop coefficients (Kc) for the potato (Solanum tuberosum L.), in Seropédica, Rio de Janeiro (RJ), Brazil, under organic management, and to simulate the crop evapotranspiration (ETc) using the Kc obtained in the field and the ones recommended by the Food and Agriculture Organization (FAO). The water consumption was obtained through soil water balance, using TDR probes installed at 0.15m and 0.30m deep. At the different stages of development, the Kc was determined by the ratio of ETc and reference evapotranspiration, obtained by Penman-Monteith FAO 56. The crop coefficients obtained were 0.35, 0.45, 1.29 and 0.63. The accumulated ETc obtained in the field was 109.6 mm, while the ETc accumulated from FAO's Kc were 142.2 and 138mm, respectively, considering the classical values and the values adjusted to the local climatic conditions. The simulation of water consumption based on meteorological data of historical series from 1961 to 2007 provided higher value of ETc when compared with the one obtained in the field. From the meteorological data of historical series, it was observed that the use of Kc recommended by FAO may overestimate the amount of irrigation water by 9%, over the same growing season.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000100020
Editor: | Associação Brasileira de Engenharia Agrícola
Relação: | 10.1590/S0100-69162013000100020
Formato: | text/html
Fonte: | Engenharia Agrícola  v.33 n.1 2013
Fonte: | info:eu-repo/semantics/openAccess