饲粮α-半乳糖苷酶对爱拔益加肉鸡生长性能和养分利用率及肠道黏膜形态结构的影响  

Effects of Different α-galactosidase Levels on Growth Performance, Nutrient Utilization and Intestinal Mucosa Structure of AA Broilers

作　　者：林谦[1,2] 蒋桂韬[3] 张旭[3] 王向荣[3] 戴求仲[1,2] 

机构地区：[1]中国农业科学院麻类研究所,湖南长沙410205 [2]湖南农业大学动物科学技术学院,湖南长沙410128 [3]湖南省畜牧兽医研究所,湖南长沙410131

出　　处：《中国畜牧杂志》2016年第5期38-43,共6页Chinese Journal of Animal Science

摘　　要：为研究饲粮α-半乳糖苷酶对爱拔益加（AA）肉鸡生长性能、养分表观利用率和肠道黏膜形态结构的影响,试验选择1 d体重相近的健康AA肉鸡360羽,随机分成6个处理,每处理5个重复,每重复12羽,处理A饲喂玉米-豆粕型基础饲粮作为正对照组,处理B在基础饲粮水平上降低代谢能0.21 MJ/kg,作为负对照组,处理C、D、E、F分别在负对照基础上添加75、150、300和600 g/t的α–半乳糖苷酶制剂（酶活400 U/g）。结果表明：饲粮添加不同水平α–半乳糖苷酶对1~42 d各处理AA肉鸡平均日增重（ADG）、平均日采食量（ADFI）和饲料增重比（F/G）均无显著影响（P〉0.05）,但150 g/tα–半乳糖苷酶组ADG最高、F/G最低;150 g/tα–半乳糖苷酶组干物质、粗蛋白质和能量的表观利用率最高,且干物质及粗蛋白质表观利用率均显著高于正、负对照组（P〈0.05）;3）试验各处理试鸡空肠、回肠的肠壁厚度、绒毛高度、隐窝深度和绒毛高度/隐窝深度均无显著差异（P〉0.05）,而各处理十二指肠绒毛高度以处理D最高,且处理D十二指肠绒毛高度/隐窝深度显著高于处理E（P〈0.05）。本试验条件下,基础饲粮降低0.21 MJ/kg代谢能的基础上,添加150 g/t的α–半乳糖苷酶制剂最佳。To evaluate the effects of different levels of α-galactosidase on growth performance, nutrient apparent utilization and intestinal mucosa structure of AA broilers, 360 of healthy 1-day-old AA broilers with the nearly same weight were randomly a total of allocated to 6 groups, 5 replicates in each group and 12 broilers in each replication.The positive control group was provided with the corn-soybean basal diet, the negative control group was fed the basal diet which was reduced 0. 21 MJ / kg ME, and the test groups（ C, D, E, F） were fed the negative control diet added75 g/t, 150 g/t, 300 g/t, 600 g/t α-galactosidase（enzyme activities was 400 U/g） respectively. The experiment period was 42 d. The results showed that： the ADG, ADFI and F/G during the whole experiment period（ P〉0.05）, but there was a trend that the addition of 150 g/t α-galactosidase（Group D） decreased F/G and increased ADG for 1-42 d AA broilers. The addition of 150 g/t α-galactosidase（Group D） got the highest apparent utilization of DM, CP and energy,And the apparent utilization of DM, CP of group D were significantly higher than those of positive and negative control group（P〈0.05）. There was no significant difference in intestinal wall thickness, villus height, crypt depth and V/C of ileum and jejunum（P〉0.05）, but the Group D got the highest villus height of duodenum, and V/C of duodenum of Group D was significantly higher than that of Group E（P〈0.05）. In general, adding 150 g/t α-galactosidase had a positive effect when fed the diet which was reduced 0.21 MJ/kg ME during 1-42 d.

关 键 词：Α-半乳糖苷酶 生长性能 养分表观利用率 肠道黏膜形态结构 爱拔益加肉鸡 

分 类 号：S831.5[农业科学—畜牧学]