关键词: 淀粉来源, 小肠, 消化率, 降解率, 断奶仔猪

Abstract: 【Objective】 The study was conducted to compare digestibility of different dietary starches on different segments of small intestine and the degradation in vitro, in order to effectively utilize dietary starch resource.【Method】 A total of 20 crossbreed (Duroc×Landrace×Yordshire) piglets (average BW of 8.0±0.6 kg) weaned at 28 day of age were randomly assigned to four treatments and fed with Corn diet, Brown rice diet, Sticky rice diet or Resistant starch (RS) diet, respectively. The digestibility of different starches on different segments of small intestine and the starch degradation in vitro were determined by slaughter technique and enzyme-decomposition method, respectively. 【Result】 The starch digestibility of Stick rice starch diet in anterior jejunum, posterior jejunum, anterior ileum and terminal ileum, and the degradation in vitro were increased significantly (P<0.05) compared with the other 3 groups. The digestions of the starch on different segments of small intestine (Y) were related to Amylose (X1) and amylopectin (X2). As to the in vitro starch degradation rate and starch degradation coefficients in different incubate hours, Stick rice diet starch was significantly higher than the other groups (P<0.05). 【Conclusion】The extent of starch digestion in different segments of small intestine and in vitro degradation were affected significantly by the dietary starch sources.