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

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(0.8 g/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。

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

Six adult Small-tail Han rams at the age of 1 to 1.5 years,with the average body weight of 55.3 kg±3.8 kg,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(0.8 g/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 phenylalanine 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.