Carcass characteristics of lambs fed diets with increasing levels of crude glycerin

Abstract

ObjectiveAn experiment was conducted to evaluate the effects of increasing levels of crude glycerin (0%, 6%, 12%, and 18%) used as a substitute for corn in lamb feed on the quantitative characteristics of the carcass.MethodsA total of 40 crossbred Santa Inês lambs that were four months old with a mean initial weight of 21.0±0.8 kg were randomly distributed in four treatments with ten replicates. The animals were slaughtered after 66 days of confinement. The effects of crude glycerin as a replacement for corn in the diet of the lambs on the carcass characteristics, commercial cut weight and yield and carcass measurements were studied.ResultsThere was an increasing linear effect for body weight at slaughter with the replacement of corn by crude glycerin. The dry matter and metabolizable energy intakes, weight of the empty body, hot carcass weight and cold carcass weight showed a quadratic effect, with maximum crude glycerin levels estimated at 10.9%, 9.8%, 10.83%, 11.78%, and 11.35%, respectively. The initial pH was not influenced by the replacement of corn for crude glycerin, while the final pH presented a quadratic effect. The other parameters of the carcass and the weights and yields of commercial cuts were not influenced. There was also no effect of the diets on carcass morphometric measurements, except for the thoracic perimeter and the carcass compactness index, which presented quadratic and linear effects, respectively.ConclusionCrude glycerin can replace up to 18% of corn because it favours muscle tissue deposition without promoting changes in the main carcass characteristics of lambs.

Effects of glycerol supplementation to Awassi lambs diet on performance and carcass quality characteristics

“…There were non-significant differences between the treatments regarding both the fore shank and the flank cuts weights. The increase in the weight of the main and secondary cuts could be attributed to the increase in the carcasses weight in the second and third treatments compared to the first treatment .The results of this study were not in agreement with the results of da Costa et al (2019) who found a non-significant differences were of carcass cuts weight when five levels of glycerol were used. Gomes, et al (2022), found no significant differences in the average of weight carcass cuts when three levels of glycerol were used.…”

“…The results of this experiment were in agreement with the results reported by Ribeiro et al (2021),regarding the final body weight .Similarly, our results were in agreement with the findings of Bezerra (2022)who found a significant differences were in the average empty body weight when using three levels of glycerol were used,( 0, 50, 100 and 150 g/kg). Da Costa et al,2019 reporting a similar significant differences for the mean final weight and mean empty body weight of lambs when using five levels of glycerol .On the contrary, the results of this experiment did not agree with that of Gomes, et al (2022), who found a non significant differences of the final body weight at slaughter, but it was in agreement with their work as they found significant differences in the mean empty body weight when using three levels of glycerol (0, 6, 12 and 18%/ kg). Likewise our results were in agreement with the finding of Wattanachant (2017) as the reported a significant differences in the final weight at slaughter using glycerol a rate of 10%.…”

Effects of type of tropical pasture and concentrate supplementation level on the carcass traits of grazing lambs

“…The results of the CCI (Table 3) were consistent with those reported by other authors who evaluated tropical pastures (Carrasco et al, 2009a;Armero and Falagán, 2015). These indices may enable an objective evaluation of carcass conformation, indicating the connections between muscle mass, adipose mass, and bone length and determining the amount of tissue accumulated per length unit (Costa et al, 2019). Heavier carcasses (Table 3) resulted in heavier commercial cuts; this result is consistent with those found in a previous study (Rocha et al, 2018).…”

“…While other tropical forage species have a greater nutritional value but, however, low the dry matter production, such as Panicum maximum cv. 'Aru-G. D. Vega Britez et al: Lamb carcasses finished in tropical pastures with supplementation ana'; those are desirable characteristics for the diet of grazing sheep (De Souza et al, 2014). Some studies have reported the effects of feed supplementation on the feeding behaviour and the uniformity of the performance of lambs raised on Aruana grass (Fajardo et al, 2015;Silveira et al, 2015), while other works have evaluated supplementation schemes on animal performance and production costs using Marandu grass (Geron et al, 2012;Carvalho et al, 2015).…”

Performance, carcass characteristics, and meat quality of lambs fed diets containing crude glycerin

“…The gluconeogenic potential of glycerol can considerably contribute to daily weight gain, feed conversion, and the quantitative and qualitative characteristics of the carcass, which is directly related to the quality and quantity of the final product and is essential for the conquest and expansion of consumer markets (Costa et al, 2019). Therefore, careful evaluation of carcasses is necessary to meet the quantity and quality requirements of the consumer market.…”