Effects of high-level chromium methionine supplementation in lambs fed a corn-based diet on the carcass characteristics and chemical composition of the longissimus muscle

Abstract

One of the main goals of the feedlot industry is to increase efficiency in the final stages of fattening. Therefore, the use of modulators of growth (hormones and beta-agonist agents) is widespread. The concern about the potential impact of the use of these growth promoters has furthered interest in the search for safe alternatives of modulating agents of growth in recent years. In this regards, the use of chelated minerals has shown interesting advantages in nonruminant species. In this sense, chromium (Cr) supplementation, as Cr propionate or Cr methionine, has shown increases in the percentage of carcass muscle and decreased carcass fat in pigs and poultries (1). In ruminants, Cr requirements have not been clearly established (2) and there is limited information available on the effects of Cr on carcass characteristics in feedlot cattle (3) and in feedlot lambs (4). In a recent study (5), linear decreases (P = 0.02) in kidney-pelvicheart fat and fat thickness were observed in finishing steers supplemented with chelated Cr (as Cr-enriched yeast) at daily levels of 0, 5, 10, or 15 mg/head. According to the above study, the maximum response levels were observed when cattle were fed with levels three-fold what is currently recommended. There is limited information regarding the effects of high levels of Cr supplementation on carcass characteristics and chemical composition of muscle of finished lambs. Therefore, the aim of this trial was to evaluate the effects of feeding different levels of chromium methionine on the carcass characteristics and chemical composition of the longissimus muscle (LM) in hairy lambs fed a high-energy diet. Twenty-four Pelibuey × Dorper (initial weight at start of experiment: 24.9 ± 0.2 kg) were assigned (six lambs/treatment) in indoor facilities in collective pens of 16 m 2 with automatic waterers and 1.2 m fence-line feed bunks. Lambs were fed ad libitum with a finishing diet formulated as follows (dry matter basis): 61.2% ground maize, 14.5% soybean meal, 12.6% Sudan grass hay, 7.7% molasses cane, 2.5% mineral premix, and 1.5% zeolite. The calculated composition of the basal diet dry matter basis (6) was as follows: crude protein, 17 g/kg; metabolizable energy, 12.09 MJ/kg; ether extract, 29 g/kg; calcium, 98 g/kg; and phosphorus, 36 g/kg. Lambs were adapted to the basal diet and facilities 14 day Abstract: Twenty-four male lambs (24.93 ± 0.93 kg) were used in order to evaluate the effects of chromium methionine (Cr) supplementation in high-energy finishing diets on the carcass characteristics and chemical composition of the longissimus muscle (LM). Treatments were 0.00, 0.60, 1.20, and 1.80 mg Cr/lamb daily. The experiment lasted 56 days. There were no effects of treatments on dry matter intake, feed to gain ratio, and final weight, which averaged 35.24 ± 1.01 kg. Supplemental Cr linearly decreased fat thickness enough to improve the estimated yield grade from 1.82 to 1.42 with no effect on the other carcass traits measured. Fat concentration in the LM decreased linearly as the lev...

Effect of adding Chromium-Methionine and Zinc-Methionine on production performance and some hormones in the blood of Awassi lambs

“…The results agreed with the researcher Soumar et al (2020), as he did not get significant differences between treatments in the final weight characteristic when different levels of Cr-Met and Zn-Met were used. The results also agreed with Sanchez-Mendoza et al (2015) when Cr-Met was used. In feeding lambs, no significant differences were found between the treatments.…”

“…The results in Table (3) indicate that there were no significant differences between the first and second periods (129.19, 110.17) g, respectively, in the rate of daily weight gain, and the results also did not show any significant differences between the first, second, third and fourth treatments (138.56, 108.03, 131.06 101.06 ) gm, respectively, while the third treatment in the first period (164.99) gm was significantly superior at (P≤0.05) over the second, third and fourth treatments (91.42, 97.14, 99.28) gm, respectively for the second period, and the first and second treatments did not record any significant difference in daily weight gain. These results agreed with researchers Soumar et al (2020) and Sanchez-Mendoza et al (2015) when they used different levels of Cr-Met they found no significant differences between treatments. These results differed with Alimohamady et al (2019) and Jafarpour et al (2015), as they obtained significant differences between treatments when they used Zn-Met at different levels.…”

“…moral differences. These results agreed with Soumar et al (2020) and Sanchez-Mendoza et al (2015) in the amount of feed consumed in comparison with their respective treatments. While the results of this experiment differed with the researcher Jafarpour et al (2015), as he obtained significant differences between the treatments in the amount of feed consumed.…”

Chromium Toxicity and Oxidative Stress in Broiler Chicks and its Amelioration with Vitamin E and Bentonite

“…They are highly reactive to cell organelles e.g. polyunsaturated fatty acids, proteins and nucleic acid (Sánchez-Mendoza et al, 2015). Metals like Cr are very reactive and induce oxidative damage by generating reactive oxygen species (ROS) .…”

Efeito do cromo sobre o desempenho, qualidade de carne e perfil transcricional de genes expressos no fígado e no músculo de cordeiros alimentados com dietas com elevada proporção de concentrado

“…Existem informações variáveis a respeito da influência da suplementação com Cr nas características de carcaça e qualidade de carne em ruminantes. No entanto, diversos estudos relataram que a suplementação com Cr influencia o rendimento de carcaça através do aumento do peso do músculo longissimus e da área de olho de lombo na altura da 12ª costela, em cordeiros em fase de terminação (DOMÍNGUEZ-VARA et al, 2009;ARVIZU et al, 2011;ESTRADA-ANGULO et al, 2013;SÁNCHEZ-MENDOZA et al, 2015). (BERNHARD et al, 2012) Pode ser encontrada nos mamíferos, nas células musculares.…”