回-直腸吻合ラットの栄養素の消化吸収に及ぼす食物繊維の影響

概要

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Effects of dietary fibers (DF) on digestion and absorption of nutrients were investigated in ileorectostomized rats. After operation, rats were fed a fiber-free diet (FF diet), a FF diet with 10% (W/W) wheat bran, a FF diet with 10% (W/W) solka-floc a FF diet with 5% (W/ W) pectin for 4 weeks and then fed the diets, which casein was removed from those mentioned above, for 10 days. Decreases in the growth and the food intake were observed only in rats fed the FF diet with 5% (W/W) pectin among rats fed the FF diets. Fecal excretion and water excretion into feces increased significantly with the addition of DF to the FF diet. Both apparent digestibilities of dietary protein, lipid and ash and a net digestibility of dietary protein were significantly lower in all rats fed DF than in rats fed the FF diet. Apparent absorptions of dietary Na, K, Ga and Fe also decreased with the DF feeding. Degrees of the decrease in these parameters were dependent on the type of DF.