Niacin supplementation improves growth performance and nutrient utilisation in Chinese Jinjiang cattle
Niacin supplementation improves growth performance and nutrient utilisation in Chinese Jinjiang cattle
复制标题
补充烟酸可改善中国晋江牛的生长性能和养分利用率
DOI：
10.1080/1828051x.2018.1480426
复制
发表时间：
2019-01-02
影响因子：
2.5
通讯作者：
Ouyang, Kehui
中科院分区：
文献类型：
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作者：
Luo, Dan;Gao, Yufei;Ouyang, Kehui
本研究旨在研究烟酸对晋江黄牛生产性能和营养物质利用率的影响。选用24~30月龄晋江黄牛育肥公牛48头，体重200+/-15 kg，随机分为4组。牛饲喂肥育日粮(精料比为80：20)。对照组、NA(320)、NA(480)和NA(640)组日粮中分别添加0、320、480和640 mg/kg烟酸。在试验的第1、28、56天记录48头牛的体重和饲料消耗量。饲料消化率的评估是在研究的第52至56天进行的。在第56天从每只动物身上采集血液样本。从研究的第1天到第56天，结果表明，NA(480)和NA(640)组的平均日增重(p<；0.05)显著高于对照组(p<；0.05)，料重比(p<；0.05)低于对照组。此外，添加640 mg/kg烟酸提高了所有营养物质的表观消化率(p<；0.05)，而添加480 mg/kg烟酸提高了粗蛋白质的表观消化率(p<；0.05)。此外，添加480 mg/kg和640 mg/kg烟酸可提高血清非酯化脂肪酸含量(p<；0.05)。因此，在高精料日粮中添加640 mg/kg烟酸可能有利于晋江牛的生长发育和营养物质的利用。
In the present study, the effect of niacin supplementation on the growth performance and nutrient utilisation in Chinese Jinjiang cattle was investigated. A total of 48 finishing male Jinjiang cattle aged 24-30 months, with body weights of 200 +/- 15 kg, were randomly divided into four groups. The cattle were fed a finishing diet (concentrate to forage ratio of 80:20). The diets for the control, NA(320), NA(480) and NA(640) groups were supplemented with 0, 320, 480 or 640 mg/kg of niacin, respectively. The body weight and feed consumption of the 48 cattle were recorded on days 1, 28, and 56 of the experiment. Assessment of feed digestibility was conducted from days 52 to 56 of the study. Blood samples were collected from each animal on day 56. From days 1 to 56 of the study, the results indicated a significant increase in the average daily weight gains (p < .05) and lower feed to gain ratios (p < .05) for the NA(480) and NA(640) groups than for the control group. Furthermore, supplementation with 640 mg/kg niacin increased the apparent digestibility of all nutrients (p < .05), whereas supplementation with 480 mg/kg niacin enhanced the apparent digestibility of crude protein (p < .05). Moreover, supplementation with 480 and 640 mg/kg niacin increased the content of serum nonesterified fatty acids (p < .05). Therefore, it was concluded that supplementation with 640 mg/kg niacin in a high-concentrate diet may be beneficial to growth and nutrient utilisation in Chinese Jinjiang cattle.