Determination of the optimal irrigation depth for sweet corn in Sete Lagoas, MG

• Autor(es):

  Heinemann, Alexandre B. (COPERSUCAR);

  Sousa, Sérgio A.V. de (USP. ESALQ);

  Frizzone, José A. (USP. ESALQ. Departamento de Engenharia Rural/Irrigação).

• Fonte:

  Revista Brasileira de Engenharia Agrícola e Ambiental; volume 5, número 1, páginas 147-151. Abril 2001.

• Assuntos:

  analysis;

  simulation;

  sweet corn;

  Zea mays.

• Resumo:

  The objective of this study was to determine the optimal irrigation application that gives the maximum revenue of sweet corn during the rainy season, in Sete Lagoas, State of Minas Gerais, Brazil. Decision criterion was used to determine the optimal irrigation application. Four irrigation depths were used (385, 289, 193 and 96 mm). The irrigation water amount of 385 mm was calculated from a production function and this water amount gave the maximum yield. The results showed that the 385 mm gave the best revenue, considering the water price up to R$ 0.36 per 10 m³. With a higher water price, the best revenue was obtained when the irrigation water depth was 289 mm.

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