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- Title
VARIABILIDADE ESPACIAL DA PRECIPITAÇÃO NO CULTIVO DE MILHO SEGUNDA SAFRA NO PARANÁ UTILIZANDO O MODELO WAVE.
- Authors
GAMERO, PAULO; ANGEL URIBE-OPAZO, MIGUEL; DE BASTIANI, FERNANDA; ADRIANI JOHANN, JERRY; CARVALHO GUEDES, LUCIANA PAGLIOSA
- Abstract
Understanding the spatio-temporal behavior of rainfall is important for agriculture, because it affects productivity. Paraná is one of the largest corn producers in the country, and cultivates corn in two seasons (1st and 2nd crop). Thus, this work evaluated rainfall spatial pattern spatial during the 2nd corn crop period of cultivation in the years 1996 to 2015. Accumulated ten-year data from the National Water Agency (ANA) rainfall stations, and Europe Center for Medium- Range Weather Forecasts (ECMWF) virtual stations were used. The spatial behavior of rainfall over time was analyzed using the geostatistical wave model. In the estimate parameters the maximum likelihood method was used and maps were generated by kriging. Cross-validation indicated good results for the wave model compared to those of the exponential, Gaussian, Mátern k = 1, k = 1.5 models. For all years analyzed there was spatial dependence, with a frequency of 0 to 100 mm in the 3rd ten-day period of May in most of the years analyzed. The ideal average period for sowing the 2nd crop corn in Paraná is the 1st ten-day period in March, when the crop will reach its vegetative peak in the 3rd ten-day period in May, with space and time of ideal rainfall for cultivation.
- Publication
Revista IRRIGA - Brazilian Journal of Irrigation & Drainage, 2020, Vol 25, Issue 3, p521
- ISSN
1413-7895
- Publication type
Article
- DOI
10.15809/irriga.2020v25n3p521-536