Qualidade do milho safrinha em função do tempo de transporte após a colheita

Abstract

The work was the objective of evaluating the effect of the waiting time during the period of transport after harvesting the corn grains grown in the latter season are inside the bodies of trucks waiting to unload in the storage units, were evaluated qualitative losses of maize grown in the latter season during the process of post-harvest until the beginning of drying with different harvest water content (28.54; 22.42; 20.98 and 19.00% wb) and transport times after harvest (0, 2, 4, 6, 8 and 10 days), thus the experiment was conducted in a split plot scheme 4 x 6, with four harvesting water content in the plots and six evaluation periods related to the transport time between harvesting and drying the subplots, in a completely randomized design. Seeds of super hybrid planted in latter season 2014/2014 were used, the hybrid was planted BG 7061H and effected all cultural treatments. After the corn grain harvest were stocked in wooden boxes by measuring 1x2x1 or 2 m³, and covered with plastic canvases, simulating the time that the grains are in truck bodies, samples for grain analyzes were performed at harvest, and 2 each subsequent day until the tenth day. To evaluate the physical and technological quality were carried test samples in order to establish the quality of the harvested grain through the grain classification density, fungi, conductivity and color test for the chemical analyzes of protein tests were carried , ether extract, ash and carbohydrates during the six transport times. The results indicate that with the transport time, the mass temperature and the water content of grains increased by modifying the quality of corn grains grown in the second crop. The quality reductions were larger at the highest water content and are influenced by the time that the corn kernels were stockpiled in timber boxes after harvest, thus affecting the color of the grain, which have submitted blackening, has increased levels of electrical conductivity, ash and carbohydrates, and there was an increase in by fungi contamination indices, and demonstrated a reduction in protein, ether extract and specific mass. The recommended time between harvest and transportation to the reception and drying, the storage units are less than two days for four water levels assessed from corn grains cultured in the latter season.