Effects of Dietary Vitamin B6 Supplemental Level on Digestion and Metabolism, and Antioxidant Ability of 3 to 5-Month Old Growing Rex Rabbits

LIU Gongyan; SUN Chaoran; SHANG Suimin; WU Zhenyu; WANG Chunyang; LI Fuchang

doi:10.3969/j.issn.1006-267x.2015.11.018

2015 , Vol. 27 >Issue 11: 3468 - 3477

DOI: https://doi.org/10.3969/j.issn.1006-267x.2015.11.018

SPECIAL ECONOMIC ANIMAL NUTRITION

Effects of Dietary Vitamin B₆ Supplemental Level on Digestion and Metabolism, and Antioxidant Ability of 3 to 5-Month Old Growing Rex Rabbits

LIU Gongyan ,
SUN Chaoran ,
SHANG Suimin ,
WU Zhenyu ,
WANG Chunyang ,
LI Fuchang

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

Received date: 2015-05-29

Online published: 2015-11-21

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Abstract

The experiment was conducted to investigate the effects of dietary vitamin B₆ supplemental level on digestion and metabolism, and antioxidant ability of 3 to 5-month old growing Rex rabbits. A total 200 3-month old health Rex rabbits were randomly divided into 5 groups with 40 replicates in each group and 1 rabbit in each replicate. Rabbits in the 5 groups were fed the basal diet supplemented with 0, 5, 10, 20 and 40 mg/kg vitamin B₆, respectively. The trial lasted for 7 days for adaptation, and 54 days for test. The results showed as follows:dietary vitamin B₆ supplemental level had an extremely significant influence on nitrogen intake (IN) (P=0.004 5), and had significant influences on digestible nitrogen (DN) (P=0.034 4) and nitrogen apparent digestibility (NAD) (P=0.043 6). The IN in 10 and 20 mg/kg groups was extremely significantly higher than that in other groups (P<0.01), and the DN and NAD in 10 mg/kg group came to the maximum, but had no significant influences compared with 20 mg/kg group (P>0.05). Dietary vitamin B₆ supplemental level had an extremely significant influence on methionine apparent digestibility (P=0.006 8), had significant influence on cystine (P=0.011 3), glutamate (P=0.022 6) and serine apparent digestibility (P=0.047 8), and all of them in 20 mg/kg group came to the maximum. Dietary vitamin B₆ supplemental level had significant influences on pancreatic trypsin (P=0.035 4) and chymotrypsin activities (P=0.043 2), and the highest values were all found in the 20 mg/kg group. Dietary vitamin B₆ supplemental level had significant influences on serum total protein (TP) (P=0.014 3) and urea nitrogen (UN) contents (P=0.048 2), and the highest value of TP content and the lowest value of UN content were all found in the 20 mg/kg group. Dietary vitamin B₆ supplemental level had an extremely significant influence on serum total antioxidant capacity (T-AOC) (P=0.006 9), had significant influences on serum glutathione peroxidase (GSH-Px) (P=0.044 2) and total superoxide dismutase (T-SOD) activities (P=0.048 1), and the highest values of them were all in the 20 mg/kg group, meanwhile, the serum malonaldehyde (MDA) content in the 20 mg/kg group had the minimum. Considering all indices of this experiment, the appropriate dietary vitamin B₆ supplemental level is 10 to 20 mg/kg for 3 to 5-month old growing Rex rabbits.

Key words： vitamin B₆; Rex rabbit; digestion and metabolism; serum biochemical indices; serum antioxidant indices

Cite this article

LIU Gongyan , SUN Chaoran , SHANG Suimin , WU Zhenyu , WANG Chunyang , LI Fuchang . Effects of Dietary Vitamin B₆ Supplemental Level on Digestion and Metabolism, and Antioxidant Ability of 3 to 5-Month Old Growing Rex Rabbits[J]. Chinese Journal of Animal Nutrition, 2015 , 27(11) : 3468 -3477 . DOI: 10.3969/j.issn.1006-267x.2015.11.018

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