EFFECT OF DIFFERENT STORED METHODS ON CHANGE OF TE VANG MAIZE GRAIN QUALITY

Abstract

The experiment was implemented to study effect of different stored methods on change of te vang maize grain quality. The experiment included 5 treatments: CT1 stored with husk leaves, CT2 maize grain stored in sacks, CT3 maize grain stored in bamboo woven cribs, CT4 maize grain stored in vacuum bags, CT5 maize grain stored in sacks and added weevils chased leaves. The samples were taken each two months to determine grain moisture and change of grain nutrient contents. The results showed that grain moisture slightly increared in CT4 after 8 months storage (from 13.25% to 14.33%); in which this criteria was highly increased in CT1, CT2, CT3, CT5 (from 13.52% to 21.16% in CT1; from 13.43% to 20.13% in CT2; from 13.66% to 19.95% in CT3; from 13.67% to 20.16% in CT5). The grain nutrient contents had highly decreased trend through the storage in CT1, CT2, CT3, CT5 and slightly decreased in CT4. For example, the starch content after 8 months storage declined 45.96% in CT1, 45.49% in CT2, 45.37% in CT3, 44.34 in CT5 and only 4.18% in CT4. The protein content decreased 53.0% in CT1, 50.0% in CT2, 49.05% in CT3, 46.68% in CT5 and 7.95% in CT4. The lipid content decreased 77.9% in CT1, 69.03% in CT2, 64.02% in CT3, 75.0% in CT5 and 23.37% CT4. The storage methods had a significant impact on controlling the increase of grain moisture, the decrease of grain nutrient contents and CT4 (stored in vacuum bags) gave high values.