Morales-López R, Auclair E, García F, Esteve-Garcia E, Brufau J
Institute of Research, Food Technology and Agriculture, Department of Animal Nutrition, Centre Mas de Bover, Carr. Reus-Morell, km 3.8, 43120 Constantí (Tarragona), Spain.
Poult Sci. 2009 Mar;88(3):601-7. doi: 10.3382/ps.2008-00298.
Two experiments were carried out to evaluate the effect of dietary addition of yeast cell wall (YCW); beta-1, 3/1, 6-glucan (BG); and mannoprotein complex (MP) purified fractions in broilers. In experiment 1, there was a control diet and 5 experimental diets containing, respectively: 10 mg of avilamycin (AVI)/kg of feed, 500 mg of YCW/kg of feed, 95 mg of MP/kg of feed, 145 mg of BG/kg of feed, and 95 mg of MP plus 145 mg of BG/kg of feed. All birds were vaccinated via drinking water against Newcastle disease virus at 9 d of age. At 42 d, chickens fed AVI, YCW, MP + BG, and BG diets had similar BW not significantly different from chickens fed the control diet. The antibody response of Newcastle disease virus vaccine was not affected by any experimental treatment. Broilers fed MP + BG diet had greater thymus weights (P </= 0.05), as a percentage of BW than those from the control and AVI treatments, but similar with respect to YCW and BG treatments. In experiment 2, there was a group-fed basal diet and 3 additional experimental groups receiving the basal diet supplemented with, respectively: 500 mg of YCW/kg of feed, 190 mg of MP/kg of feed, and 227 mg of BG/kg of feed. At 42 d of age, no difference in broiler growth rates was observed. Samples of the jejunum were collected at 21 d of age to determine villus height. Significantly higher villus height was observed in YCW, MP, and BG groups compared with that of the control group. The relative percentage of liver weight (P </= 0.01) was lower in broilers fed YCW than in broilers fed the control diet, but no differences were observed in respect to chickens fed BG. Data of these studies suggested that the changes in thymus and liver relative weights and villus morphology of broilers were induced with the same intensity by the use of complete YCW, MP + BG, and BG supplements.
进行了两项试验以评估日粮中添加酵母细胞壁（YCW）、β-1,3/1,6-葡聚糖（BG）和甘露糖蛋白复合物（MP）纯化组分对肉鸡的影响。在试验1中，有一个对照日粮和5种试验日粮，分别含有：10毫克阿维拉霉素（AVI）/千克饲料、500毫克YCW/千克饲料、95毫克MP/千克饲料、145毫克BG/千克饲料以及95毫克MP加145毫克BG/千克饲料。所有鸡只在9日龄时通过饮水接种新城疫病毒疫苗。在42日龄时，饲喂AVI、YCW、MP + BG和BG日粮的鸡只体重相似，与饲喂对照日粮的鸡只相比无显著差异。新城疫病毒疫苗的抗体反应不受任何试验处理的影响。饲喂MP + BG日粮的肉鸡胸腺重量占体重的百分比高于对照和AVI处理组（P≤0.05），但与YCW和BG处理组相似。在试验2中，有一组饲喂基础日粮，另外3个试验组分别在基础日粮中添加：500毫克YCW/千克饲料、190毫克MP/千克饲料和227毫克BG/千克饲料。在42日龄时，未观察到肉鸡生长速率有差异。在21日龄时采集空肠样本以测定绒毛高度。与对照组相比，YCW、MP和BG组的绒毛高度显著更高。饲喂YCW的肉鸡肝脏重量相对百分比低于饲喂对照日粮的肉鸡（P≤0.01），但与饲喂BG的鸡只相比未观察到差异。这些研究数据表明，使用完整的YCW、MP + BG和BG补充剂对肉鸡胸腺和肝脏相对重量以及绒毛形态的改变强度相同。
