Impacto do período de espera para secagem na qualidade do arroz

Abstract

Rice is a grain, which is a fundamental principle of conservation, which is based on the metabolism of biological, microbiological, chemical and enzymatic species. Harvesting of rice grains occurs seasonally throughout the year. Between the months of February and April, there is a greater movement in the pre-storage operations, increasing the queues of trucks and the waiting time for the unloading of the grains coming from the field. The objective of this study was to evaluate the impact of the waiting time for reception on the quality parameters of the rice in the husk and to contribute to the maintenance of the quality of the rice, demonstrating what effects they reflect on the product. During the 2017/18 harvest, between the months of March and April, 38 samples were evaluated, collecting data on the waiting time, the cultivar, the temperature of the mass and the harvest moisture. Subsequently they were submitted to cleaning and drying operations until reaching 12.5 ± 0.5% moisture. The industrial performance of the samples was evaluated, obtaining the income and yield of the grains and the incidence of defects. In general, it was observed that harvest moisture influenced the yield of whole grains for the 6 rice cultivars. In isolation, the precipitation variable influenced the GURI INTA CL cultivar, reducing its yield. Waiting time and load temperature significantly affected the percentage of defects in the cultivars analyzed. It was verified the influence of precipitation on the increase of the percentage of defects, in isolation, in the PUITÁ INTA CL cultivar. The effects of moisture and waiting time on the increase of the temperature of the load and on the increase of the percentage of defects were verified. It concludes that the waiting time is negatively lower after 30 hours, when the quality of the grains decreases, decreases the percentage of fluids and intensifies the percentage of metabolic defects.