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Study on Digestibility of Starch from Oat,Wheat,Buckwheat and Sweet Potato in Intestinal Tract of Growing Pigs by Feeding Semi-single Diet

HUANG Ju1,2,YIN Fu-gui1,2,BO Mei-juan1,2,LI Tie-jun1,2,HUANG Rui-lin1 (1.Institute of Subtropical Agriculture,the Chinese Academy of Sciences,Key Laboratory of Agro-ecological Processes in Subtropical Region,Laboratory of Animal Nutrition and Human Health and Key Laboratory of Agro-ecology,Changsha,Hunan 410125,China; 2. Graduate University of Chinese Academy of Sciences,Beijing 100049,China)  
This experiment was conducted to determine the digestibility of starch from oat,wheat,buckwheat and sweet potato for enriching the data bank of energy diets and offering people more references about main foods. 16 crossed-bred (Duroc×Landrace×Yorkshine) growing pigs weighed average of 25 kg,were randomly assigned to four groups and housed individually in pens. And the T-canales fistulae operation was carried on each pig. Every group fed one of four diets containing minerals,vitamins,0.1% indicator (TiO2) and oat,wheat,buckwheat,and sweet potato starch respectively. The formal experiment lasted 15 days. In last 3 days,the digesta and feces of all pigs were collected for digestibility analyzing. The results showed that the digestibility of starch from oat,wheat,and buckwheat were higher than that from sweet potato (p0.05). It was indicated that so far as starch digestibility was considered,oat,wheat,and buckwheat were better diet energy sources than sweet potato.
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