Effects of Dietary Supplemental Level of Isoflavones on Antioxidant, Growth and Carcass Performance of Finishing Pigs

CHEN Wei; LIN Yingcai; MA Xianyong; JIANG Zongyong; YU Deqian

doi:10.3969/j.issn.1006-267x.2014.02.020

Chinese Journal of Animal Nutrition >

2014 , Vol. 26 >Issue 2: 437 - 444

DOI: https://doi.org/10.3969/j.issn.1006-267x.2014.02.020

Feed Science and Technology

Effects of Dietary Supplemental Level of Isoflavones on Antioxidant, Growth and Carcass Performance of Finishing Pigs

CHEN Wei ,
LIN Yingcai ,
MA Xianyong ,
JIANG Zongyong ,
YU Deqian

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The Key Laboratory of Animal Nutrition and Feed Science (South China) of Ministry of Agriculture, State Key Laboratory of Livestock and Poultry Breeding, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China

Received date: 2013-09-02

Online published: 2014-01-27

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Abstract

This experiment was conducted to investigate the effects of dietary supplemental level of isoflavones on antioxidant, growth and carcass performance of finishing pigs. Seventy-two finishing pigs (half castrated boars and half sows, Duroc×Landrace×Large white) weighted about 60 kg were randomly allocated into 6 groups with 6 replicates in each group and 1 castrated boar and 1 sow per replicate. Pigs in control group were fed a corn-soybean meal basal diet, and those in experimental groups were fed the basal diet supplemented with 40, 80, 160 and 320 mg/kg isoflavones, respectively. The experiment lasted for 64 days. The results showed as follows: 1) dietary supplementation of isoflavones at 160 mg/kg significantly increased plasma CAT activity (P<0.05), and that at 80 mg/kg significantly increased liver CAT activity (P<0.05), while that at 160 mg/kg significantly inhibited liver CAT activity (P<0.05). 2) Dietary supplementation of isoflavones at 40 and 80 mg/kg significantly decreased plasma GSSG concentration (P<0.05), that at 40, 80, 160 and 320 mg/kg significantly increased plasma GSH concentration (P<0.05), and that at 80 and 160 mg/kg significantly decreased plasma MDA concentration (P<0.05). 3) Liver Gpx activity was decreased linearly with the increase of isoflavones supplemental level (P<0.05), and dietary supplementation of isoflavones at 80, 160 and 320 mg/kg significantly decreased liver Gpx activity (P<0.05). 4) Pro/antioxidant balance (PAB) value in liver did not differ among different supplemental levels, but it showed liner response to the increase of isoflavones supplemental level; compared with control group, dietary supplementation of isoflavones at 320 mg/kg tended to increase PAB value in plasma (P=0.08). 5) Average daily gain, daily feed intake and feed to gain ratio were not affected by dietary supplementation of isofalvones (P>0.05); the carcass indices, dressing weight/percentage, logissimus muscle area, average backfat thickness, lean weight/percentage and fat weight/percentage and so on, did not differ among treatments (P>0.05); drip loss, meat color, tenderness and pH of logissimus muscle were not affected by dietary supplementation of isoflavones (P>0.05). It is concluded that dietary supplementation of isoflavones at proper level can enhance antioxidant performance of finishing pigs, while it exerts inhibitory effects on antioxidant performance when at higher level (especially in liver tissue), the supplementation of isoflavones in corn-soybean meal diet does not affect growth performance, carcass performance and meat quality of finishing pigs.

Key words： isoflavones; finishing pigs; anti/pro-oxidant; growth performance; carcass performance; meat quality

Cite this article

CHEN Wei , LIN Yingcai , MA Xianyong , JIANG Zongyong , YU Deqian . Effects of Dietary Supplemental Level of Isoflavones on Antioxidant, Growth and Carcass Performance of Finishing Pigs[J]. Chinese Journal of Animal Nutrition, 2014 , 26(2) : 437 -444 . DOI: 10.3969/j.issn.1006-267x.2014.02.020

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