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Supplementation of L-carnitine under varying photoperiod regimes improved production performance of broiler chickens

Jay P. Picardal

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Int. J. Biosci.11(3), 249-259, September 2017

DOI: http://dx.doi.org/10.12692/ijb/11.3.249-259


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The role of photoperiod in support of specific nutrient supplementation has been investigated to maximize growth, improve net gain and better feed conversion ratio in broiler chickens. Despite some advances, the relationship between restricted photoperiod and fat-burning feed supplements has not been fully explored in recent years. This study investigated the effects of 200 ppm L-carnitine and photoperiod on the production performance of broilers (12-day old, n=60). A 2×2 factorial design in RCBD was carried out to produce four treatment groups (15 replicates / group); T1 = 16 hours light:8 hours dark without L-carnitine, T2 = 16L:8D with L-carnitine, T3 = 8L:16D with L-carnitine and T4 = 8L:16D without L-carnitine. At 42 days, the highest weight was observed in T2 (2.090kg), while the lowest FCR was reported in T1 (2.40). Overall, there were slight differences between treatments in terms of body weight and feed conversion ratio (FCR) but were insignificant (p<0.05) to be attributed to interaction effects of L-carnitine and photoperiod. The study concluded that supplementation of L-carnitine improved production performance as evidenced by higher body weight and low FCR while % abdominal fat was lower than the unsupplemented group. It can also be deduced that the photoperiod of 16L:8D was the better regime, as evidenced by the better production performance of broiler chickens. Farmers may supplement feeds with 200 ppm or 0.02% (200 mg/L drinking water) of L-carnitine and adopt a photoperiod regime of 16 hours light and 8 hours dark period to hasten optimum productivity.


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Supplementation of L-carnitine under varying photoperiod regimes improved production performance of broiler chickens

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