Gabrovska L, Ganovski Kh
Vet Med Nauki. 1981;18(9):65-70.
Two groups of lambs (aged 2 weeks to 12 months and equalized in terms of age, breed, and liveweight) were given rations, differing in type as follows: the first group obtained concentrates which predominated in the ration (a 'concentrate' group), and the second one obtained mainly roughage in the ration (a 'hay' group). After the completion of one year of age three animals of each group were surgically treated so as to form duodenal anastomoses. Then the fistulated animals were used in balance and physiologic experiments. In one experiment each group was given the same (in structure) ration up to the age of one year. In a second experiment the rations of the groups were interchanged. It was found that the total coefficients of digestibility of the feed stuffs depended on the ration type, and the coefficients of digestibility with the dry matter, organic matter, crude proteins and fats, and mineral matter proved higher in the group that was given mainly concentrates.
两组羔羊（年龄在2周龄至12月龄之间，在年龄、品种和体重方面进行了均衡）被给予以下不同类型的日粮：第一组获得在日粮中占主导地位的精饲料（“精饲料”组），第二组获得日粮中主要为粗饲料（“干草”组）。在满一岁后，每组选取三只动物进行手术处理，以形成十二指肠吻合术。然后，将形成瘘管的动物用于平衡和生理学实验。在一项实验中，每组在一岁前都给予相同（结构上）的日粮。在第二项实验中，两组的日粮进行了互换。结果发现，饲料的总消化系数取决于日粮类型，并且在主要给予精饲料的组中，干物质、有机物、粗蛋白、脂肪和矿物质的消化系数更高。
