Efficacy of chromium picolinate on performance and tissue accretion in pigs with different lean gain potential.

Abstract

We conducted two experiments to determine whether the efficacy of chromium picolinate (CrP) on growth performance, carcass composition, and tissue accretion rates is dependent on the lean gain potential of the pigs. In Exp. 1, 40 barrows (20 from each of two genetic backgrounds; two pigs per pen, five pens per treatment) were fed a fortified, corn-soybean meal basal diet (.95% lysine from 19 to 55 kg BW; .80% lysine from 55 to 109 kg BW) without or with 200 microg/kg of Cr from CrP. The addition of Cr had no effect on performance, carcass measurements, or accretion rates of carcass protein or lipid, regardless of the lean gain potential of the pigs. In Exp. 2, 60 group-penned pigs (three pigs per pen; five pens per treatment) were fed a fortified, corn-soybean meal basal diet without or with 200 microg/kg of Cr from CrP from 21 to 104 kg BW. Within the dietary Cr treatments, half of the pigs received daily injections of 3 mg of porcine somatotropin (pST) from 54 to 104 kg BW. The pST administration resulted in faster growth rates (P < .007), improved feed efficiency (P < .001), increased longissimus area (P < .001), and decreased 10th-rib backfat (P < .001). Administration of pST also increased the percentage and accretion rate of carcass protein (P < .001) and decreased the percentage and accretion rate of carcass lipid (P < .001). The addition of CrP to the diet had no effect on any variable measured in either the untreated or pST-treated pigs. In these studies, Cr was ineffective at altering the composition of the carcass and its effects were not dependent on the pig's potential for lean gain.

Ractopamina, cromo-metionina e suas combinações como aditivos modificadores do metabolismo de suínos em crescimento e terminação

“…Não foi observado efeito significativo (P>0,05) da suplementação de cromo-metionina sobre o ganho diário de peso e a conversão alimentar para o período analisado, resultado semelhante àqueles obtidos por outros estudos com 200 ppb de picolinato de cromo, que, também, não relataram benefícios em ambas variáveis (Amoikon et al, 1995;Mooney & Cromwell, 1999). Entretanto, diferentemente dos resultados apresentados em outras pesquisas, a suplementação de 200 ppb de picolinato de cromo aumentou o ganho diário de peso (Lien et al, 2001) e melhorou a conversão alimentar (Lindemann et al, 1995).…”

Effects of chromium yeast supplementation on growth performances and meat quality in rabbits.

“…In particular, a reduction in body fat level seems to occur in animals with lower growing potential and reduced ability to develop lean body mass (HASTEN et al, 1997). Nevertheless, recent studies by MOONEY and CROMWELL (1999), carried out on pigs with different lean gain potential, did not show any interaction between genetic line and feed treatment with Cr.…”

Effects of Dietary Chromium (III) Picolinate on Growth Performance, Respiratory Rate, Plasma Variables, and Carcass Traits of Pigs Fed High-Fat Diets

“…Supplemental Cr as Cr (III) picolinate (CrPic) has been reported to increase leanness and/or decrease fat deposition of pigs in some studies [25][26][27][28] but not in others [29][30][31]. In a commercial environment, dietary Cr has been suggested to be more effective in animals with high propensity for body fat deposition [32].…”