青海省贵南地区藏羊常用饲料瘤胃降解率测定

Determination of ruminal degradation rates of common feedstuffs for Tibetan sheep in Guinan areas of Qinghai

为了为藏羊冷季舍饲期间饲料的使用提供理论依据,试验选用3只装有永久瘤胃瘘管的2岁藏羊,用尼龙袋法测定了青海省贵南地区藏羊饲料的瘤胃降解特性。结果表明:72小时时,各种精料中干物质、中性洗涤纤维、酸性洗涤纤维降解率从高到低依次为青稞、玉米、菜籽饼;蛋白质降解率从高到低依次为菜籽饼、青稞、玉米;粗脂肪降解率从高到低依次为玉米、菜籽饼、青稞;青贮干物质、粗蛋白、粗脂肪及酸性洗涤纤维降解率均高于青干草,青干草又高于披碱草;精料蒸气压片、饲草青贮可提高藏羊瘤胃消化率。

To provide a theoretical basis on feed processing for Tibetan sheep during barn feeding periods in cold season, three tureen - cannulat- ed Tibetan sheep（ at two years of age） were selected in the research. Nylon bag technique was used to evaluate the forages and ruminal degrada- tion characteristics of the feedstuffs processed with difference ways in Guinan areas of Qinghai. The results showed that. The degradation rates of dry matter （DM） ,neutral detergent fiber （NDF） ,and acid detergent fiber （ADF） at 72 h, in descending order, were barley,maize,and rape seed cake; the degradation rates of crude protein （CP） , in descending order, were rape seed cake,barley,and maize; the degradation rate of crude fat （CF） , in descending order, were maize, rape seed cake, and harley. The degradation rates of DM, CF, CP, NDF, and ADF, in de- scending order, were silage oats grass, dry oats grass, and elymus dahuricus. The steam -flaked concentrate and forage silage can improve the di- gestibility in the rumen of Tibetan sheep.