Effect of feeding tannic acid and kidney bean (Phaseolus vulgaris) on the intestinal absorption of D-galactose and L-leucine in chickens
Santidrian, S. | Marzo, F.
Weight changes, food intake, in-vivo intestinal absorption of D-galactose (2.77 mM) and L-leucine (5 mM) and in-vitro intestinal absorption of D-galactose (2 mM) were studied in male growing chickens fed ad libitum from hatching for periods of 21 and 49 days on 210 g kg-1 protein diets containing either heated soya bean (HSB, control) with or without added tannic acid (25 and 30 g kg-1) or raw kidney bean (RKB, Phaseolus vulgaris L) as the main sources of protein. As compared with HSB-fed birds, weight gain was significantly smaller (P less than 0.05) in the HSB + tannic acid- and RKB-fed birds; these chickens ate significantly more (P less than 0.05) than HSB-fed birds. Regardless of the number of days of feeding, both HSB + tannic acid- and RKB-fed birds showed a significant reduction (P less than 0.05) in the rates of in-vivo intestinal absorption of galactose and leucine and in-vitro intestinal absorption of galactose, as compared with HSB-fed chickens, these effects being especially marked in the RKB-fed birds. The possible implications of these findings are discussed.
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