【作者】 孙海涛； 杨丽萍； 李春燕； 李福昌； 刘磊；

【Author】 SUN Hai-tao;YANG Li-ping;Li Chun-yan;LI Fu-chang;LIU Lei;Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural science;Shandong Key Lab of Animal Disease Control and Breeding;College of Animal Science and Technology, Shandong Agricultural University;

【机构】 山东省农业科学院畜牧兽医研究所； 山东省畜禽疫病防治与繁育重点实验室； 山东农业大学动物科技学院；

【摘要】 本试验旨在研究饲料中烟酸水平对獭兔肉品质和毛囊发育的影响,从而确定日粮中烟酸在獭兔日粮中的适宜添加水平。选择体重相近的3～5月龄獭兔160只,随机分为4组(每组40个重复,每个重复1只兔)分别饲喂添加0、50、100和200 mg/kg烟酸的饲粮,预饲7天,正饲53天。结果发现:饲粮中烟酸补充对毛囊发育有显著影响(P<0.05),随着日粮中烟酸水平的增加,总毛囊密度、初级毛囊密度、次级毛囊密度呈现为先增加后降低的现象,在50 mg/kg～100 mg/kg添加水平时达到最大值。随着日粮中烟酸水平的增加,次级毛囊密度/初级毛囊密度呈现为先降低后增加的现象,在50 mg/kg添加组和100 mg/kg添加组达到最小值(P<0.05)。日粮烟酸添加水平对肉质的L、a*、pH24、滴水损失影响不显著(P>0.05),对b*影响显著(P<0.01),随着日粮烟酸水平的增加b*值有先升高后降低的趋势,与对照组相比100mg/kg添加组b*值(绝对值)显著降低,且达到最低值。综合本试验测定指标,3～5月龄生长獭兔饲粮烟酸适宜添加水平为50～100 mg/kg。更多还原

【Abstract】 This experiment was conducted to investigate the effects of dietary niacin supplemental level on meat quality and hair follicle development in growing Rex rabbits aged from 3 to 5 months. A total of 160three-month-old Rex rabbits with similar body weight of were randomly divided into 4 groups with 40 replicates per group and 1 rabbit per replicate.Rabbits in the control group were fed a basal diet, and the others in the experimental groups were fed the experimental diets supplemented with 50, 100 and 200 mg/kg niacin, respectively. The pre-test period lasted for 7 days, and the experimental period lasted for 53 days. Compared with control group, the supplement with niacin(50-100 mg/kg) significantly increased the primary follicles, secondary follicles and total follicle density of rabbit skin(P<0.05), but significantly reduced the secondary/primary follicle density ratio(P<0.05). Although dietary niacin treatment had no effect on the L value, a* value, pH24 and drip loss of rabbit meat(P>0.05), dietary niacin treatment(100 mg/kg) significantly decreased the b* value(absolute value) compared with the control(P<0.05). In conclusion,the suitable dietary niacin supplement level in Rex rabbits aged from 3 to 5 months is 50-100 mg/kg.更多还原