光照节律对肉兔生长性能、血清生化指标、肉品质和动物福利的影响

doi:10.11843/j.issn.0366-6964.2022.05.017

Abstract

Abstract: The aim of this study was to investigate the effects of lighting rhythm on the growth performance, blood metabolites, meat quality and behavior of rabbits. One hundred and thirty five 35-day-old weaned male Hyla rabbits were randomly divided into 3 treatments with 15 replicates and 3 rabbits in each under the lighting photoperiods of 12 h light:12 h darkness (12L:12D), 24 h light (24L), and 24 h darkness (24D), respectively. The light intensity was 100 lx. The experimental period lasted for 35 days after 7 days of pre-trail. The results showed that compared with 12L:12D group, the average daily feed intake (ADFI), feed conversion rate (FCR) at 21-35 d, carcass yield, pH and cooked meat rate of longissimus lumborum in 24D group increased significantly (P<0.05), and the blood glucose concentration decreased significantly (P<0.05). The FCR and carcass yield of 24D group were the highest in all treatment groups (P<0.01). The leather index of 24L group was significantly lower than that of 12L:12D and 24D groups (P<0.01), while the albumin (ALB) and meat water loss rate were significantly higher than that of 12L:12D and 24D groups (P<0.01). There was no significant difference in meat color or conventional nutritive indexs among treatment groups (P>0.05). The duration of sitting behavior of the 24D group was the least (P<0.01), the frequency of gnawing behavior was lower than other groups(P<0.05), and the frequency of hyperactivity, rearing and standing behavior were the highest in all groups (P<0.05). The results showed that long-term dark environment could improve the growth performance and reduce the blood glucose concentration of rabbits. At the same time, rabbits showed more sociality, less fear and anxiety in the long-term darkness, having good welfare.

Key words: rabbit, lighting rhythm, growth performance, serum biochemical indexes, behavior

CLC Number:

GUO Zihan, JIANG Qiqi, WANG Bin, ZHAO Na, HE Zhifei, LI Hongjun, LV Jingzhi. Effect of Lighting Rhythm on Growth Performance, Serum Biochemical Indexes, Meat Quality and Welfare of Rabbits[J]. Acta Veterinaria et Zootechnica Sinica, 2022, 53(5): 1500-1508.

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Effect of Lighting Rhythm on Growth Performance, Serum Biochemical Indexes, Meat Quality and Welfare of Rabbits

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