精料型日粮条件下添喂气溶胶OT对小尾寒羊前胃和小肠消化吸收的影响  

The Effect of Supplement of Aerosol OT on the Digestion and Absorption in the Former Stomach and Small Intestine of Small-tail Han Sheep Fed with Concentrate-type Diet

作　　者：李昊[1] 雒秋江[1] 潘榕[1] 周封文 尼加提.克以木 

机构地区：[1]新疆农业大学动物科学学院,乌鲁木齐830052

出　　处：《中国畜牧兽医》2015年第11期2961-2968,共8页China Animal Husbandry & Veterinary Medicine

基　　金：新疆维吾尔自治区科技厅面上项目(20131028235)

摘　　要：试验选取6只1~1.5岁,体重（55.3±3.8）kg,装置永久性十二指肠近端T型瘘管和回肠末端T型瘘管的小尾寒羊公羊,收集十二指肠和回肠食糜,通过自身对照试验,研究在精料型（玉米秸秆占30%）日粮条件下添喂气溶胶OT（0.8g/kg日粮）对小尾寒羊前胃和小肠消化吸收的影响。结果表明,添喂气溶胶OT使小尾寒羊干物质自由采食量增加23.6%（P〈0.01）。前胃干物质、有机物、粗蛋白质和纤维素的消化量分别增加39.2%（P〈0.01）、37.3%（P〈0.01）、21.8%（P〈0.01）和13.4%（P〈0.01）;到达小肠的干物质、有机物、粗蛋白质、微生物蛋白质和过瘤胃蛋白质分别增加8.9%（P〈0.01）、8.8%（P〈0.01）、21.3%（P〈0.01）、29.3%（P〈0.01）和13.1%（P〈0.01）;总氨基酸、赖氨酸、蛋氨酸、苏氨酸、缬氨酸和苯丙氨酸分别增加45.6%（P〈0.01）、62.7%（P〈0.01）、40.8%（P〈0.01）、32.8%（P〈0.01）、32.0%（P〈0.01）和32.3%（P〈0.01）。小肠干物质、有机物、粗蛋白质、钙和磷消化吸收量分别增加28.7%（P〈0.01）、29.8%（P〈0.01）、28.7%（P〈0.01）、26.6%（P〈0.01）和13.1%（P〈0.01）;小肠总氨基酸、赖氨酸、蛋氨酸、异亮氨酸、精氨酸和组氨酸消化吸收量分别增加37.6%（P〈0.01）、56.9%（P〈0.01）、28.6%（P〈0.01）、40.9%（P〈0.01）、41.5%（P〈0.01）和51.7%（P〈0.01）。由以上得出结论,添喂气溶胶OT可以提高小尾寒羊自由采食量,增加前胃和小肠营养物质消化吸收量,显著改善宿主的营养供应。Six adult Small-tail Han rams at the age of 1to 1.5years,with the average body weight of 55.3kg±3.8kg,fitted with the permanent duodenum and ileum T-type canula,were fed with concentrate-type diet（cornstalk as 30%）,collecting the chyme of the duodenum and ileum to study the effect of supplement of aerosol OT（0.8g/kg of diet（as DM basis））on the digestion and absorption in the former stomach and small intestine by self-control experimental design.The results showed that by supplementing of aerosol OT the voluntary intake of dry matter was increased by 23.6%（P〈0.01）,the digested DM,OM,CP and cellulose in former stomach were increased by 39.2%（P〈0.01）,37.3%（P〈0.01）,21.8%（P〈0.01）and 13.4%（P〈0.01）respectively;DM,OM,CP,microbial protein and by-pass protein arrived at small intestine were increased by 8.9%（P〈0.01）,8.8%（P〈0.01）,21.3%（P〈0.01）,29.3%（P〈0.01）and 13.1%（P〈0.01）,respectively;The total amino acids,lysine,methionine,threonine,valine and phenylal-anine arrived at small intestine were increased by 45.6%（P〈0.01）,62.7%（P〈0.01）,40.8%（P〈0.01）,32.8%（P〈0.01）,32.0%（P〈0.01）and 32.3%（P〈0.01）,respectively.DM,OM,CP,calcium and phosphorous absorbed in small intestine were increased by 28.7%（P〈0.01）,29.8%（P〈0.01）,28.7%（P〈0.01）,26.6%（P〈0.01）and 13.1%（P〈0.01）,respectively;The total amino acids,lysine,methionine,isoleucine,arginine and histidine absorbed in small intestine were increased by 37.6%（P〈0.01）,56.9%（P〈0.01）,28.6%（P〈0.01）,40.9%（P〈0.01）,41.5%（P〈0.01）and 51.7%（P〈0.01）,respectively.It was concluded that the supplement of aerosol OT could increase the voluntary intake and the digestion and absorption in forestomach and small intestine,therefore significantly modify the nutrient supply for sheep.

关 键 词：气溶胶OT 小尾寒羊 前胃 小肠 消化 

分 类 号：S816.32[农业科学—饲料科学]