STUDY OF TEMPERATURE AND TIME EFFECT ON STORED GRAIN WHEAT
Abstract
ABSTRACT: Grain wheat had been being stored at different storage temperatures for five months in order to investigate the effectiveness of temperature and duration on this food in Bani Waleed city. The bad storage condition is not significantly proper for a reserve human food. The high rate of insects infestation and weight loss is the main problem during storage period. The grain wheat had been being stored for 5 months (from 20th of April up to 20th of September) at 20 oC (a room with air conditioner), 37 oC (inside a room at ambient conditions) and 55 oC (outside under sun rays with a simple cover which is represent the local traditional store). A kilogram had been taken from each sample and all samples were weighted every (15, 30, 45, 60,75, 90, 105, 120,135 and 150) days in order to calculate number of insects/kg and the weight loss. The data had been analyzed by IBM SPSS software version 25 statistics and expressed as mean± standard deviation using Two-way ANOVA. The obtained results at the end of storage period demonstrated that weight loss and insects’ population were at the highest values of 34% and 348 insect/kg into storage of 37 oC. In addition, the weight loss and insects’ population were 23% and 183 insect/kg into storage of 55 oC. However, the weight loss and insects’ population were 0.40% and 25 insect/kg into storage of 20 oC. Furthermore, the Duncan’s multiple range test analysis exposed that is a significant difference between whole samples at different temperatures and time (P-value < 0.05). In conclusion, the lower temperature storage is the appropriate method in order to limit insect invasion and post harvested food loss. Moreover, the domestic traditional store is not a convenient way for postharvest grain wheat.