烟酸铬对西门塔尔牛日粮养分消化率的影响

Effects of chromium nicotinate on nutrient digestibility in Simmental steer

试验选用4头体重(500±20)kg,年龄3.5岁,装有永久性瘤胃瘘管的西门塔尔牛阉牛,采用4×4拉丁方试验设计,以混合精料和风干玉米秸秆为基础日粮,研究日粮中添加烟酸铬(0、40、80、120 mg/d)对日粮养分消化率的影响。结果表明:日粮添加烟酸铬80 mg/d组的干物质(DM)、有机物质(OM)、粗脂肪(EE)、粗蛋白质(CP)、无氮浸出物(NFE)、中性洗涤纤维(NDF)和酸性洗涤纤维(ADF)的表观消化率较对照组显著提高(P<0.05)。因此在本试验条件下日粮中烟酸铬适宜添加水平为80 mg/d。

Four Simmental steers [BW（500 ± 20）kg,3.5 years old] with permanent rumen cannula consuming mixed concentrate and corn silage diet were used in a 4 x 4 Latin square design and supplemented with four concentration （0,40,80,120 mg/d） of chromium nicotinate to evaluate the effects of different chromium nicotinate concentrations on nutrients digestibility of diets in steers.The results showed that the apparent digestibilities of dry matter （DM） ,organic matter（OM） ,ether extract（EE）,crude protein（CP）,nitrogen free extract（NFE）,neutral detergent fibre（NDF） and acid detergent fibre （ADF） increased significantly when steers diets supplemented with 80 mg/d chromium nicotinate （P 〈 0.05）. The results indicated that the optimum dose of chromium nicolinale supplementation was 80 mg/d.