Resumo

ALONSO-SANCHEZ, Homero et al. Water productivity and corn yield under different humidity availability. Rev. Mex. Cienc. Agríc [online]. 2020, vol.11, n.5, pp.1005-1016.  Epub 03-Out-2021. ISSN 2007-0934.  https://doi.org/10.29312/remexca.v11i5.2118.

Experimenting with hybrids for conditions with scarce water is essential for water and food security, integrating crop management with that of water resources. The objective of this work was to define water productivity, grain yield, and hectolitre weight in three environments with different humidity availability: irrigation and rainfed in the FESC-UNAM and irrigation in Texcoco, State of Mexico; using five corn hybrids from UNAM and five from INIFAP, with two planting densities. The experiment was established in complete random blocks and variables were registered during the cycle and at harvest; total water productivity was calculated as the total volume of water between grain yield at 14% humidity. Using SAS, ANOVA was performed to analyze the factors and their interactions, the means were separated with the Tukey test at 5%. The effect of the interaction environment x hybrid and hybrid x planting density was found on the total productivity of the water. In the grain yield, an effect of the interaction environment x hybrid, environment x density and hybrid x density was found. A highly significant effect was found on the hectoliter weight of the environment and the type of hybrid. The interaction of the Atziri Puma hybrid with the environments and with the planting density showed the maximum values of total water productivity and grain yield.

Palavras-chave : gross volume; irrigation and rainfed; irrigation plus precipitation; irrigation tip; water use efficiency.

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