This study was conducted to investigate the effects of diet supplemented with different levels of cys-tine on hair production performance of Angora rabbits.A total of 180 wool clipped Angora rabbits were divided into five groups with 36 replicates per group,and each replicate had one rabbit.Rabbits in the control group were fed a corn-soybean meal type basal diet,and those in the experimental groups were fed the basal diet sup-plemented with 0.1％,0.2％,0.3％and 0.4％cystine,respectively.The pre-trial lasted for 3 days,and the formal trial lasted for 73 days.The results showed that,compared with the control group,diet supplemented with 0.1％,0.2％and 0.3％cystine significantly improved the average daily feed intake(P＜0.05),and diet supplemented with 0.1％and 0.2％cystine significantly reduced the feed/wool ratio(P＜0.05);diet supple-mented with 0.4％cystine significantly increased the activity of glutathione peroxidase(GSH-Px)in serum(P＜0.05);diet supplemented with 0.1％and 0.3％cystine significantly increased the secondary hair follicle density of subcutaneous of back(P＜0.05),diet supplemented with 0.1％,0.2％and 0.4％cystine significant-ly increased the breaking force of rabbit hair(P＜0.05),and diet supplemented with 0.4％cystine significantly increased the fiber fineness of rabbit hair(P＜0.05);in addition,diet supplemented with 0.2％and 0.3％cys-tine significantly upregulated the expression of keratin-associated protein 6.1(KAP6.1)in back skin of rabbits(P＜0.05).In conclusion,dietary cystine supplementation can improve wool quality and promote the hair folli-cle development of Angora rabbits.Under the conditions of this experiment,the optimal supplemental level of cystine in the diet of Angora rabbits is 0.1％.[Chinese Journal of Animal Nutrition,2024,36(4):2586-2593]
关键词
安哥拉兔/胱氨酸/毛品质/毛囊发育
Key words
Angora rabbits/cystine/wool quality/hair follicle development
维普
万方数据