Resumo

GUZMAN LUNA, Lilibeth et al. Temporal variation of irrigation requirements in corn Rodionov method in DR001, Pabellón, Aguascalientes. Rev. Mex. Cienc. Agríc [online]. 2023, vol.14, n.5, pp.52-65.  Epub 15-Set-2023. ISSN 2007-0934.  https://doi.org/10.29312/remexca.v14i5.3084.

Some of the consequences of climate change will manifest themselves in temporal and spatial variations in precipitation and in an increase in the evaporative demand of the atmosphere, which in turn will lead to an increase in the demand for irrigation of agricultural crops. This work analyzed the temporal variation of agroclimatic irrigation requirements (AIRs) for corn in DR001 Pabellón, Aguascalientes, as well as the thermal growth period (TGP) with information from five climatological stations with 36 years of records. A base temperature of 9 °C was assumed to define three sowing dates: February 15, June 15 and October 15. The AIRs were estimated with a climatological station with more records (1943-2018), the Hargreaves method was used to calculate reference evapotranspiration and the United States Agricultural Service method was used for effective precipitation. The temporal variation (mean and standard deviation) of the AIRs was performed by the Rodionov method, by means of the indices of regime changes in the mean and in the variance (CSSI). The index values of regime changes indicate that an increase in the AIRs began in 1995, for the sowing date February 15, an initial change was observed in 2009 for that of June 15, while for October 15 there is an increase in the year 1993 with another in the years 2012 to 2018. No changes in CSSI, with evidence of changes in the AIRs, which are related to the variation of precipitation and temperature.

Palavras-chave : climate change; mean changes; rainfall regime; variance changes..

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