摘要
Ninety six pigs average weight 9.15 kg were used to study the effects of feeding diets containing multiple sources of dietary fiber （DF） on weight gain and concentration of fermentation products in the digestive tract. The experiment employed four diets and four pens diet1. Diets included a low fiber diet （LFD）, as control and three antibiotic free high-fiber diets （HFD） containing a 1：2, 1：1 or 2：1 oats：barley ratios. At the end of the 70 d feeding trial three pigs of comparable weight diefI were slaughtered. Digesta taken from the stomach, cecum and colon were used for the determination of volatile fatty acids （VFA）. Results indicated that inclusion of HFD increased （P 〈 0.05） feed intake but not weight gain. As revealed by the higher feed intake the nutritional value of HFD was approximately 88% of LFD. Also, as the amount of oats in the diet was increased, VFA concentration was also increased while isobutyrate decreased （P 〈 0.05）. Lower concentration of isobutyrate may indicate parallel reduction in other putatively toxic products of protein fermentation in the digestive tract. Thus, inclusion of multiple sources of fiber in the diet impacted feed intake and the products of gut fermentation in growing pigs.
