Physiological potential of maize seeds submitted to different treatments and storage periods

Giovanna Emanuelle Gonçalves Mariucci, Andréia Kazumi Suzukawa, Alessandro Lucca Braccini, Carlos Alberto Scapim, Luiz Henrique da Silva Lima, Priscila Angelotti, Raissa Marrafon Ponce, Danilo Cesar Volpato Marteli

Abstract


The aim of the study was to evaluate seed germination and vigor of maize subjected to different products and storage period. The experimental design was completely randomized in a split plot on time. In the plots were distributed 9 treatments: an untreated control, one treatment called "standard treatment", with addition of fungicide and insecticide. From the standard treatment, six treatments with combinations of inoculant, micronutrients and bioregulator. Lastly, a treatment called "complete treatment" including all products. In subplots the storage periods of 0, 15, 30, 45, 60 and 90 days were evaluated. In each period, the tests were evaluated as follow: germination test, modified cold test, emergence speed index and seedling length. It is concluded that, seed vigour of maize is reduced by seed treatments and storage. Micronutrients addition resulted in higher reduction in seeds vigor, regardless of storage time. Treatments did not affect the germination in up to 45 days of storage. The treatment with the combinations of fungicide, insecticide and inoculant proved to be feasible, and presented as the most promising seed treatments. It is recommended that the treatment of maize seeds should be carried out as close as possible to the sowing.

Keywords


Zea mays; Chemical treatment; Germination; Vigour

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