The effect of dietary fibre on the small intestines and apparent digestion in the turkey
The effect of dietary fibre on the small intestines and apparent digestion in the turkey
复制标题
膳食纤维对火鸡小肠和表观消化的影响
作者：
David Sklan;A. Smirnov;I. Plavnik
1.为了确定在火鸡日粮中使用高纤维日粮的可行性，在三个年龄段饲喂三种粗纤维日粮浓度的火鸡母鸡，并测定其生产性能、纤维消化率和小肠形态。2.当日粮中含有80至90 g粗纤维/kg时，生长速率和饲料效率降低;然而，当在1至4周龄或6至8周龄之间饲喂60 g粗纤维/kg时，生长没有变化，并且在11至14周龄之间增强。3.粗蛋白质、脂肪和总能量（GE）的消化率在1 ~ 4周龄纤维摄入量为80 ~ 90 g/kg时受到抑制，但在以后的年龄中没有抑制。粗纤维消化率随日龄增加而增加，随膳食纤维含量增加而降低。4.小肠总长度和表面积增加高膳食粗纤维摄入量之间的11和14周。在不同的粗纤维浓度下，不同年龄的猪十二指肠、空肠和回肠中绒毛的长度、直径和数量、绒毛的大小和面积发生了微小但不一致的变化。5.粗纤维可以在一定程度上利用火鸡和浓度60克纤维/公斤的饮食并没有导致性能下降后，6周龄。
1. In order to determine the feasibility of using high fibre diets in turkey rations, three crude fibre dietary concentrations were fed to turkey hens at three ages and performance, fibre digestibility and small intestinal morphology were determined. 2. Growth rate and feed efficiency decreased when diets contained 80 to 90 g crude fibre/kg; however, growth did not change when 60 g crude fibre/kg was fed between 1 and 4 weeks or between 6 and 8 weeks and was enhanced between 11 and 14 weeks of age. 3. Digestibilities of crude protein, fat and gross energy (GE) were depressed at fibre intakes of 80 to 90 g/kg between 1 and 4 weeks but not at later ages. Crude fibre digestibility increased with age and decreased with dietary fibre content. 4. Total small intestinal length and surface area were increased by high dietary crude fibre intake between 11 and 14 weeks. Small but inconsistent changes in the length, diameter and number of villi, villus size and area were observed in the duodenum, jejunum and ileum at the different ages as a result of feeding the different crude fibre concentrations. 5. Crude fibre can be utilised to some extent by turkeys and concentrations of 60 g fibre/kg in the diet did not result in decreased performance after 6 weeks of age.