Effects of Dietary Cobalt Supplemental Level on Growth Performance, Slaughter Performance, Muscle Quality and Fur Quality of Weaned to 3-Month-Old Rex Rabbits

GAO Qin; LIU Lei; SUI Xiaoyi; SUN Haitao; LIU Gongyan; LI Fuchang

doi:10.3969/j.issn.1006-267x.2016.11.040

2016 , Vol. 28 >Issue 11: 3694 - 3700

DOI: https://doi.org/10.3969/j.issn.1006-267x.2016.11.040

SHORT COMMUNICATIONS

Effects of Dietary Cobalt Supplemental Level on Growth Performance, Slaughter Performance, Muscle Quality and Fur Quality of Weaned to 3-Month-Old Rex Rabbits

GAO Qin ,
LIU Lei ,
SUI Xiaoyi ,
SUN Haitao ,
LIU Gongyan ,
LI Fuchang

Expand

1. College of Animal Science and Technology, Shandong Agricultural University, Tai'an 271018, China;
2. Animal Husbandry and Veterinary Institute, Shandong Academy of Agricultural Sciences, Jinan 250100, China

Received date: 2016-05-26

Online published: 2016-11-18

Fold

Abstract

This experiment was conducted to study the effects of dietary cobalt supplemental level on growth performance, slaughter performance, muscle quality and fur quality of weaned to 3-month-old Rex rabbits. Two hundred weaned Rex rabbits were randomly assigned into 5 groups with 40 replicates in each group and each replicate contained 1 rabbit. Rabbits in 5 groups were fed experimental diets which supplemented with 0, 0.1, 0.4, 1.6 and 6.4 mg/kg cobalt (in the form of cobalt sulfate) on the basis of a basal diet, respectively. The trial lasted for 7 days for adaptation and 60 days for test. The results showed that dietary cobalt supplemental level had significant influences on final body weight (FBW) (P<0.05) and average daily feed intake (ADFI) (P<0.01), but had no significant influences on average daily gain (ADG) and feed/gain (F/G) (P>0.05). With the increase of dietary cobalt supplemental level, the FBW and ADFI tended to be increased firstly and then decreased, and the highest values appeared when dietary cobalt supplemental level was 0.4 mg/kg. Dietary cobalt supplemental level had no significant influences on eviscerated ratio, half eviscerated ratio and muscle quality indices including pH, drip loss ratio, shear force and meat color (L^*, a^* and b^* values) (P>0.05). However, with the increase of dietary cobalt supplemental level, the eviscerated ratio and half eviscerated ratio tended to be increased firstly and then decreased. Dietary cobalt supplemental level had no significant influences on fur area, fur weight and fur thickness (P>0.05). With the increase of dietary cobalt supplemental level, the fur weight tended to be increased firstly and then decreased, and the highest value appeared when dietary cobalt supplemental level was 0.4 mg/kg. Dietary cobalt supplemental level had no significant influences on thymus index, spleen index and liver index (P>0.05). With the increase of dietary cobalt supplemental level, the thymus index tended to be increased firstly and then decreased, and the highest value appeared when dietary cobalt supplemental level was 0.4 mg/kg. Considering all indices of this experiment, the appropriate dietary cobalt supplemental level is 0.4 mg/kg for weaned to 3-month-old growing Rex rabbits (the basal diet cobalt content is 0.27 mg/kg).

Key words： cobalt; Rex rabbits; growth performance; slaughter performance; fur quality; immune performance

Cite this article

GAO Qin , LIU Lei , SUI Xiaoyi , SUN Haitao , LIU Gongyan , LI Fuchang . Effects of Dietary Cobalt Supplemental Level on Growth Performance, Slaughter Performance, Muscle Quality and Fur Quality of Weaned to 3-Month-Old Rex Rabbits[J]. Chinese Journal of Animal Nutrition, 2016 , 28(11) : 3694 -3700 . DOI: 10.3969/j.issn.1006-267x.2016.11.040

References

[1] GEORGIEVSKⅡ V I,ANNENKOV B N,SAMOKHIN V T.Mineral nutrition of animals:studies in the agricultural and food sciences[M].London:Moncellous Bookbinders Ltd,1981.
[2] MCDOWELL L R.Minerals in animal and human nutrition[M].2nd ed.Amsterdam:Academic Press,2003:277-296.
[3] KADIM I T,JOHNSON E H,MAHGOUB O,et al.Effect of low levels of dietary cobalt on apparent nutrient digestibility in Omani goats[J].Animal Feed Science and Technology,2003,109(1/2/3/4):209-216.
[4] 姜成钢.荷斯坦泌乳奶牛铜锌钴铁碘需要量的研究[D].硕士学位论文.北京:中国农业大学,2005.
[5] 穆秀梅,毛杨毅,罗惠娣,等.饲料中添加钴、维生素B₁₂对羔羊增重的影响[J].饲料工业,2008,29(2):11.
[6] 郭孝,介晓磊,哈斯通拉格,等.日粮中添加高微量元素苜蓿青干草对杜泊羊生产性能的影响[J].草业科学,2009,26(1):100-104.
[7] 刘镜恪,陈晓琳.鱼类的痕量矿物质研究进展[J].海洋科学集刊,2003(10):153-162.
[8] PATERSON J E,MACPHERSON A.A comparison of serum vitamin B₁₂ and serum methylmalonic acid as diagnostic measures of cobalt status in cattle[J].Veterinary Record,1990,126(14):329-332.
[9] FISHER G E J,MACPHERSON A.Effect of cobalt deficiency in the pregnant ewe on reproductive performance and lamb viability[J].Research in Veterinary Science,1991,50(3):319-327.

[10] 董海军,周容.微量元素钴在动物营养上的研究与应用[J].饲料工业,2007,28(18):42-45.
[11] 王润莲,张微,张玉枝,等.不同钴水平对肉用绵羊瘤胃维生素B₁₂合成、瘤胃发酵及造血机能的影响[J].动物营养学报,2007,19(5):534-538.
[12] HERTZ Y,MADAR Z,HEPPER B,et al.Glucose metabolism in the common carp (Cyprinus carpio L.):the effects of cobalt and chromium[J].Aquaculture,1989,76(3/4):255-267.
[13] DE BLAS C,MATEOS G G.Feed formulation[M]//DE BLAS C,WISEMAN J J.The nutrition of the rabbit.New York:CABI Publishing,1998:241-253.
[14] MBURU J N,BADAMANA M S,KAMAU J M Z.Faecal and urinary losses of nitrogen in cobalt-deficient small East African goats[J].Indian Journal of Animal Science,1994,64(11):1264-1267.
[15] 杨文平,岳文斌,董玉珍,等.添加不同水平锌、铁和钴对绵羊增重及体内代谢的影响[J].饲料研究,2000(3):11-12.
[16] 赵振山,徐毅刚,王寿兵,等.团头鲂配合饲料中锰和钴添加量的研究[J].水利渔业,1995(1):22-24.
[17] 梁德海,刘发义,孙凤,等.中国对虾对Co需要量的研究[J].海洋科学,1991(3):12-14.
[18] TIFFANY M E,SPEARS J W,XI L,et al.Influence of dietary cobalt source and concentration on performance,vitamin B₁₂ status,and ruminal and plasma metabolites in growing and finishing steers[J].Journal of Animal Science,2003,81(12):3151-3159.

[19] STRYDOM P E.Do indigenous Southern African cattle breeds have the right genetics for commercial product ion of quality meat[J].Meat Science,2008,80(1):86-93.

[20] KADIM I T,MAHGOUB O,SRIKANDAKUMAR A,et al.Comparative effect of low levels of dietary cobalt and parenteral injection of vitamin B₁₂ on carcass and meat quality characteristics in Omani goats[J].Meat Science,2004,66(4):837-844.

[21] 李庆云,袁建敏,闫磊,等.不同钴水平对北京鸭生产性能和血液生理生化指标的影响[J].中国畜牧杂志,2008,44(21):33-37.
[22] 张福勋.獭兔毛皮质量与取皮时间的相关性研究[J].当代畜牧,2005(6):4-6.
[23] 吴金山.如何评定獭兔皮质量[J].中国养兔杂志,2005(1):44-45.
[24] 刘汉中,麻名文,延宁,等.钴对肉兔生长性能、免疫及生化指标的研究[J].饲料研究,2010(3):53-56.

Options

Outlines

模态框（Modal）标题

Abstract

Cite this article

References