The study was conducted to investigate the effects of supplementation with polyunsaturated fatty acids of different vegetable oils and L-carnitine on boar libido, semen characteristics, fatty acid composition of sperm and semen antioxidant properties. Thirty adult Pietrain×Duroc hybrid boars with similar age and body condition were randomly divided into 3 groups with 10 replicates and 1 pig in each replicate. The diet of group 1 was supplemented with 1.5% soybean oil; group 2 was supplemented with 1.5% soybean oil+200 mg/kg L-carnitine; group 3 was supplemented with 0.3% of soybean oil+1.2% flax seed oil+200 mg/kg L-carnitine. The feeding trial lasted for 16 weeks. The results showed that the semen volume and ejaculation duration of boars in group 3 were significantly higher than those in the other two groups (P<0.01), and the reaction time was significantly less than those in the other groups (P<0.01). The sperm motility of boars in group 3 was significantly higher than that of the boars in group 1 (P<0.01), and the sperm density was higher than that of the boars in group 1 (P＞0.05). During 8 to 16 weeks, the sperm docosahexaenoic acid (DHA, n-3) content and activity of superoxide dismutase (SOD) of boars in group 3 were significantly higher than those in the other groups (P<0.05). The malondialdehyde (MDA) content in semen of boars in group 1 was significantly higher than those in the other groups (P<0.01) during 8 to 16 weeks. The results suggest that dietary polyunsaturated fatty acids and L-carnitine could enhance the boar libido, increase the sperm DHA content and semen antioxidant properties, and finally improve the boar semen production, sperm motility and sperm density.［Chinese Journal of Animal Nutrition, 2011, 23（8）：1361 -1369］
BAI Xiaolong,WU De,LIN Yan,FANG Zhengfeng,CHE Lianqiang,SHAN Mei
. Different Vegetable Oils and L-carnitine Influence Libido and Semen Characteristics of Breeding Boars[J]. Chinese Journal of Animal Nutrition, 2011
, 23(08)
: 1361
-1369
.
DOI: 10.3969/j.issn.1006-267x.2011.08.015
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