Effects Of Different Treatments On The Nutrients Utilization For Chinese Storage Brown Rice In Swine Diets

Two experiments were conducted to study the effects of extrusion and enzyme addition to CSBR on the nutrients utilization for grower pigs.In Exp.1, 96 cross-bred (Duroc×Landrace×Large White) piglets weaned at d24 of age were randomly divided into four groups according to a 2×2 factorialdesign. The animals were fed four diets: (1) CSBR without enzymes supplementation diet, (2) CSBR supplemented with 625 mg α-amylase /kg (2509 U/kg diet) and 200mg glucoamylase /kg (20018 U/kg diet) diet, (3) NTECSBR without enzymes supplementation diet, and (4) NTECSBR supplemented with 625 mg a-amylase/kg (2508 U/kg diet) and 200 mg glucoamylase /kg (20010 U/kg diet) diet. The results demonstrated that extrusion resulted in a poorer (P<0.05) feed/gain for weaned pigs, extrusion or enzyme supplementation had no influence (P>0.05) on the ADFI and ADG for weaned pigs. Extrusion significantly improved (p<0.05) the activity of duodenal maltase at d 45 and glucoamylase at d 59, it heavily decreased (p<0.05) most jujunal disaccharidase activity and extremely improved (p<0.01) jejunal a-amylase at d 59; Exogenous enzyme supplementation markedly affected (p<0.05) those carbohydrase activity as follows: pancreatic a-amylase and glucoamylase at d 45, pancreatic a-amylase at d 59; duodenal a-amylase and glucoamylase at d 59, duodenal maltase at d 45; jejunal a-amylase, lactase, maltase at d 59 and ileal trehalase at d 45; the effects (p<0.05) of interaction between extrusion and enzyme addition existed at d 45 on the activity of ileal a-amylase and duodenal maltase, and at d 59 on the activity of pancreatic, duodenal and jejunal a-amylase, duodenal glucoamylase and isomaltase, jejunal lactase, isomaltase and a-amylase. Extrusion, exogenous enzyme and their interaction have- no heavy influence on the content of SG and SUN (p>0.05).In Exp.2, six grower pigs (initially 18.00±0.60 kg BW) fitted with ileal"T"-cannulas were used in a 6×6 Latin Square Design. The diets included LTESBR(80℃), NTESBR(120℃) and CSBR with or without exogenous enzyme...