Development, economic viability and attributes of lamb carcass from confined animals fed on different amounts of crude glycerin

Abstract

<p>The current study aims to assess the effect from crude glycerin inclusion (0, 7, 14, and 21% dry matter) in the diet of slaughtered lamb on their development, nutrient consumption, biometrical measures, diet economic viability and carcass features. Thirty two (32) non-castrated male Texel lambs were used in the study, they presented mean initial weight 15.9 ± 4.1 kilos and were distributed in casual outlining. They were fed with four treatments, with 8 repetitions. Animals were slaughtered when they reached approximately 35 kilos. The mean total weight gain was 20.72 kilos and mean daily weight gain was 260 grams. No changes resulted from glycerin use. The carcass performance was similar among treatments (P>0.05) and the cold carcass performance (CCP) was 44.68%. There were no effects (P>0.05) on the loin eye area (LEA) and on fat thickness (FT); they showed averages of 13.66 cm2 and 0.84 mm, respectively. Nutrition cost per animal during the whole confinement period varied between R$82.60 (eighty-two Reais and forty-eight cents) to R$92.48. The smallest nutrition amount consisted of 21% crude glycerin. The gross profit ranged from R$30.75 to R$ 34.01 per animal, for feed without glycerin and 21% glycerin, respectively. Animal development was not impacted by glycerin introduction, even with decrease on dry and organic mass consumption. The result showed that crude glycerin inclusion might be used in lambs’ diet. Whenever there are big amounts of feed involved in the process, the 21% crude glycerin addition may be an interesting cost reduction. Seventy eight percent (78%) glycerol crude glycerin to replace corn-based feed in confined lambs’ diet appeared to be nutritionally and economically viable.</p><p><strong> </strong></p>

Carcass and non-carcass component characteristics of lambs fed with cassava wastewater dregs in replacement of corn

“…In this activity, confinement is being considered as a viable alternative by allowing an intensification of animal production that is associated with reduced time to produce housing in term of the quantity and quality required by the market and accelerated returns on the capital employed (BARROS et al, 2015;REGO et al, 2015). In this production system, the fact is that conventional food concentrates, such as corn and soybean meal, are crucial for the rise in costs of confinement (XENOFONTE et al, 2009).…”