Response of tropical maize to supplemental irrigation strategies.

Water is one of the most important factors influencing crop production in rainfed cropping systems. In tropical regions, supplemental irrigation reduces the risk of yield losses associated to water deficit due to insufficient rainfall. Water deficit in regions with irregularities in rainfall may be overcome with the use of supplemental irrigation, a technique based on the application of water at amounts below the crop?s evapotranspiration (ETc). We investigated the potential of supplemental irrigation as a strategy to increase yield of maize grown under tropical conditions. We used the CSM-CERES-Maize model of the Decision Support System for Agrotechnology Transfer (DSSAT) to simulate irrigation strategies of maize in six counties in the state of Minas Gerais, Brazil. Our results indicate significant differences on simulated crop yield in response to supplemental irrigation. As a consequence, water productivity was improved with reductions of 10% and 15% of full irrigation depths in one of the six counties while in two the water productivity was higher when full irrigation was applied.

Bibliographic Details

Main Authors:	SILVA, P. P. G. da, ANDRADE, C. de L. T. de, BORGES JÚNIOR, J. C. F., MAGALHÃES, B. G., MELO, B. F. de, GARCIA Y GARCIA, A.
Other Authors:	Priscila Ponciana Gomes da Silva, Bolsista; CAMILO DE LELIS TEIXEIRA DE ANDRADE, CNPMS; João Carlos Ferreira Borges Junior, UFSJ; Bruna Gomes Magalhães, Bolsista; Bruno Ferreira de Melo, Bolsista; Axel Garcia y Garcia, University of Minnesota.
Format:	Parte de livro biblioteca
Language:	English eng
Published:	2016-09-08
Subjects:	Déficit de irrigação, DSSAT, Água,
Online Access:	http://www.alice.cnptia.embrapa.br/alice/handle/doc/1052557
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