TANNIN AND CRUDE FIBERS LEVELS REDUCTION IN    SORGHUM GRAINS BY ALKALI AND GAMMA-IRRADIATION TREATMENTS

A. H. Al-Bayati, A.; T. Al-Kaisey, M.

	TANNIN AND CRUDE FIBERS LEVELS REDUCTION IN SORGHUM GRAINS BY ALKALI AND GAMMA-IRRADIATION TREATMENTS
IRAQ JOURNAL OF AGRICULTURE
Article 1, Volume 14, Issue 4, 2009, Pages 0-0
Authors
A. A. H. Al-Bayati; M. T. Al-Kaisey
Abstract
A local brown sorghum grains were used in this study. The chemical analysis of the grains showed that it contains high percentage of tannin 5.2% and crude fibers (2.4%). Treatment of sorghum grains with different concentrations of NaOH solution (0, 2.5%, 5%, 10%, 20%) showed a significant reduction (p<0.05) in tannin content after storage at room temperature for 3, 6 and 12 days. Both the alkali treatments and storage period had a positive effect on reducing tannin content. On the other hand, irradiation of sorghum grains with gamma-ray at doses of 0, 10, 25, 50, 75, 100 k Gy, hadn't obvious effect on both protein and tannin content. However, the irradiation resulted in significant reduction (p<0.05) in crude fibers (especially, water soluble fibers and hemicellulose) content. The radiation dose reduced clearly the crude fibers content in sorghum grains. It can be concluded that the reduction of tannin and crude fibers content of sorghum grains by alkali and gamma irradiation treatments, which could improve the digestibility and nutritive value of sorghum grains.

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