N.A. Musharaf1 and J.D. Latshaw
Department of Poultry Science, 674 West lane Avenue,
The Ohio State University, Columbus, OH 43210, U .S A.
SUMMARY
An experiment was conducted to determine the effect of tannin extraction from brown grain sorghum AR 3003 x TX 430 compared with low-tannin containing grains TX 399 x TX 430 and TAM 2566 DW3 on performance of broiler starter chicks. Extraction was made with alkaline hot water or by soaking grains in hot water (60 C) for lh. Tannin content was reduced by 75 and 25%, respectively. Six isonitrogenous and isoenergetic diets (with protein supplements made of peanut meal, meat and bone meal, and cottonseed meal) were formulated. In one diet, 0.15% DL-methionine was added above the recommended level to study its effectiveness in reducing the harmful effect of tannin.
No difference in feed consumption and feed conversion was found among chicks receiving the three varieties of grain sorghum. Methionine supplementation to the untreated brown grain AR3003 x TX430 diet increased feed consumption, improved weight gain, and reduced incidence of leg abnormalities when compared to the tannin-extracted diet (P<0.05). Both extraction methods had no effect on feed con-
1 Department of Animal Science, Faculty of Agricultural Sciences, University of Gezira, P.O. Box 20 Wad medani Sudan
sumption or weight gain. However, feed conversion was improved (P<0.05) by the two extraction methods, and soaking of grains in water appeared to reduce the incidence of leg abnormality significantly.
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