Effects of Dietary Vitamin B6 Supplemental Level on Growth Performance and Vitamin B6 Metabolism of Growing Rex Rabbits

LIU Gongyan; ZHAO Nan; ZHU Yanli; LIU Lei; LIANG Caizhi; LI Fuchang

doi:10.3969/j.issn.1006-267x.2015.07.037

Chinese Journal of Animal Nutrition >

2015 , Vol. 27 >Issue 7: 2292 - 2299

DOI: https://doi.org/10.3969/j.issn.1006-267x.2015.07.037

Molecular Nutrition

Effects of Dietary Vitamin B₆ Supplemental Level on Growth Performance and Vitamin B₆ Metabolism of Growing Rex Rabbits

LIU Gongyan ,
ZHAO Nan ,
ZHU Yanli ,
LIU Lei ,
LIANG Caizhi ,
LI Fuchang

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College of Animal Science and Technology, Shandong Agricultural University, Tai'an 271018, China

Received date: 2015-01-28

Online published: 2015-07-07

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Abstract

This experiment was conducted to investigate the effects of dietary vitamin B₆ supplemental level on growth performance, fur quality, muscle quality and vitamin B₆ metabolism of growing Rex rabbits. Two hundred 3-month-old healthy Rex rabbits with similar body weight were randomly divided into 5 groups with 40 replicates in each group and each replicate contained 1 rabbit. Rabbits in 5 groups were fed experimental diets containing 0 (control), 5, 10, 20 and 40 mg/kg vitamin B₆, respectively. The trial lasted for 7 days for adaptation, and 53 days for test. The results showed that dietary vitamin B₆ supplemental level had significant influence on average daily gain (ADG) and average daily feed intake (ADFI) (P=0.017 8 and P=0.000 4, respectively), and the highest values of ADG and ADFI were found when vitamin B₆ supplemental level was 20 mg/kg. With the vitamin B₆ supplemental level increasing, the feed/gain (F/G) was firstly decreased and then increased, and it had the lowest value when vitamin B₆ supplemental level was 20 mg/kg. Dietary vitamin B₆ supplemental level had significant influences on fur weight and fur area (P=0.040 0 and P=0.001 6, respectively), but had no significant influences on fur thickness and wool length (P=0.478 0 and P=0.756 2, respectively). The fur weight and fur area in 20 mg/kg group were significantly higher than those in control group (P < 0.05 or P < 0.01). Dietary vitamin B₆ supplemental level had significant influences on pH (P=0.039 4), red value (a^*) (P=0.013 1), yellow value (b^*) (P=0.023 9) and light value (L^*) of muscle (P=0.002 5). The muscle b^* and L^* were significantly lower than those in control group (P < 0.05 or P < 0.01), while the muscle a^* was significantly higher than that in control group (P < 0.05). Dietary vitamin B₆ supplemental level had no significant influences on muscle water loss rate and shear force (P=0.216 1 and P=0.825 9, respectively). Dietary vitamin B₆ supplemental level had no significant influences on vitamin B₆ content in muscle, liver and urine (P=0.028 3, P=0.000 1 and P=0.008 1, respectively), but had no significant influence on vitamin B₆ content in serum (P=0.112 9). The muscle and liver vitamin B₆ contents in 20 mg/kg group were significantly higher than those in control group (P < 0.05 or P < 0.01). Considering all indexes of this experiment, the appropriate vitamin B₆ supplemental level is 20 mg/kg for 3 to 5-month-old growing Rex rabbits.

Key words： vitamin B₆; Rex rabbit; growth performance; fur quality; muscle quality

Cite this article

LIU Gongyan , ZHAO Nan , ZHU Yanli , LIU Lei , LIANG Caizhi , LI Fuchang . Effects of Dietary Vitamin B₆ Supplemental Level on Growth Performance and Vitamin B₆ Metabolism of Growing Rex Rabbits[J]. Chinese Journal of Animal Nutrition, 2015 , 27(7) : 2292 -2299 . DOI: 10.3969/j.issn.1006-267x.2015.07.037

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