STARCH CONTENT IN FRESH EARS OF CORN UNDER DIFFERENT STORAGE CONDITIONS
2008
RICARDO FIGUEIREDO BRAZ | JOÃO CARLOS CARDOSO GALVÃO | FERNANDO LUÍZ FINGER | GLAUCO VIEIRA MIRANDA | MÁRIO PUIATTI
Postharvest handling of corn is an important factor in the production of green corn, since it can represent up to 50% of the total production cost of this crop. As a few studies have analyzed the procedures for this fresh product, the objective of this work was to evaluate the effect of storage conditions and type of package on starch contents in green corn grains. Two corn hybrids were used in this experiment: AG 1051 and DINA 170, harvested at approximately 80 percent moisture. Two assays were conducted, being one under refrigeration at 5ºC ± 0.8ºC, and another at room temperature (22ºC ± 1.8ºC). In these conditions, three different types of package were evaluated: ears with husks, ears without husks and ears wrapped in a PVC film (without husks). Evaluations and samplings were done every three days for the treatments at room temperature and every five days for the treatments at 5ºC. Starch quantification was done using anthrone reaction. A completely randomized design with a subdivided plots scheme was used, with two replications. The means were compared by Turkey test at 5% probability. Results showed that, at room temperature, grains from wrapped ears presented lowest starch contents, regardless hybrid analyzed, and PVC film was unable to reduce the starch accumulation rates, at the tested temperatures, in both hybrids, during the ten days of storage.
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