Atraso na colheita de milho

Abstract

The aim of this work was to relatethe waiting time for the harvest of maize and its relation to the presence of damaged kernels, weight loss and moisture. The study was conducted at Fazenda Cachoeira, Campo Alto community in the town of Clevelândia – Paraná in the agricultural years 2011/12 and 2012/13, using the an hybrid of Syngenta company. Ears of corn in number of 200, in the same stage of maturation were marked, as soon as the stigma became visible. The variable was delay of harvesting with four days intervals. The test were grain rot, f determined in the seeds of a whole cobs containing between 550 and 600 units, thousand grain weight, also determined in all the seeds, using a seed moisture determinator called f Universal. The experimental design was randomized complete block with 10 treatments and three replications. As the variable was quantitative polinômios were used for analysis. Based on the results, the following conclusions were taken: 1-The loss of moisture in grains on the cob can reach more than 0.5percentage points per day; 2 - The presence of grain rot corn tends to appear 10 days after seeds reach 30% moisture, and 3 –The dry weight loss in maize on the field can reach more than 0.5 percentage points for each day of delay in harvesting.