Effects of Dietary Chromium Picolinate Supplementation on Growth Performance and Immune Responses of Broilers

Abstract

Two experiments were conducted to evaluate the effects of chromium (Cr) on the growth performance, bone trait, serum traits, and immune responses in broilers. The broilers were fed corn-soybean meal basal diet supplemented with Cr at level of 0 (control), 200, 400, or 800 ppb in the form of chromium picolinate (CrPic). The broilers were fed treated diets for 6 weeks in Exp. 1, but the Cr supplement was removed for the last 3 weeks in Exp. 2. Exp. 1 showed that dietary supplement of Cr did not affect growth performance of the broiler, though improved feed efficiency (p<0.05) was observed during 0 to 3 weeks. Moreover, serum total (p<0.05) and HDL cholesterols (p<0.06) were significantly higher in pooled Cr added group at 6 weeks of age, however, the difference was not significant in Exp. 2. The pooled Cr added group in Exp.1 had significantly lower (p<0.05) alkaline phosphatase activity and higher (p<0.09) calcium at 3 weeks. Significantly lower phosphorus was also observed in Exp. 2. With continued supplement of Cr as in Exp. 1, the alkaline phosphatase activity maintained higher at 6 weeks, as opposed to significantly lower in Exp. 2, which had no further Cr supplement. Higher bone breaking strength was observed in 400 ppb Cr supplemented in Exp. 1, though not significantly different. Serum glucose and triglyceride were not affected by Cr supplement. Antibody against Infectious Bronchitis (IB) was significantly (p<0.05) higher with 400 ppb Cr supplemented, and anti-Newcastle disease (ND) antibody also tended to be higher (p<0.06) in pooled Cr added group at 6 weeks of age in Exp. 1. Peripheral blood blastogenesis activity was not different among the treatments. The results suggest that diet supplemented with 400 ppb CrPic may be beneficial to the broilers.

Effects of dietary chromium polynicotinate supplementation on performance, fat deposition and plasma lipids of broiler chickens

“…Several researchers observed significant improvement in feed conversion ratio of broiler chickens by the addition of Cr supplement (Hossain et al, 1998;Lee et al, 2003). The results of current study indicate that chromium polynicotinate supplementation did not affect the feed conversion ratio of broilers from 10 to 28 days of age.…”

Influência do cromo no desempenho, na qualidade da carne e no teor de lipídeos no plasma sanguíneo de frangos de corte

“…Resultados semelhantes foram verificados por Oba et al (2007), em frangos de corte alimentados com 0, 400, 800 e 1.200 μg Cr/kg na forma de cromo complexado à levedura, e Chen et al (2001), que suplementaram dietas para perus com cromo nicotinato nos níveis de 0, 1 e 3 mg /kg, e não verificaram efeitos do cromo sobre o peso das aves, o consumo de ração e a conversão alimentar. Lee et al (2003) Depois de 24 horas post mortem, as amostras dos peitos das aves foram avaliadas para determinação do pH, o qual não sofreu qualquer alteração atribuível ao nível de cromo da dieta. Os valores de pH estão dentro da faixa considerada normal, ou seja, superior a 5,7 e inferior a 6,2.…”

Effects Different Levels of Nanoparticles Chromium Picolinate Supplementation on Growth Performance, Mineral Retention, and Immune Responses in Broiler Chickens

“…The role of chromium in the immune responses of mammals and chicken is well established (Burton et al, 1993;Lee et al, 2003). It has also been reported that chromium modulates the immune response through its effect on cytokine release (Wang et al, 1996).…”