Uso de massa de soja como fonte de alimento na terminação de cordeiros

Abstract

The study aimed to evaluate the performance of lambs finished with two diet formulations, one using a commercial feed and the other using a soy co-product called soy mass. The experiment was conducted on a rural property in the municipality of Capão do Leão/RS, from May to June of 2021, using 42 castrated male lambs, clinically healthy, of no defined breed and aged 8 to 10 months. The animals were divided into randomized blocks with three repetitions of each treatment. The treatments were divided according to the type of feed applied for finishing, as follows: Control treatment (CON), where the animals had access to a diet formulated with 24% supranucleus and 56% corn; Soybean mass treatment (MAS), with a soy co-product being offered to the animals, called soy mass comprising 65% and another 15% of corn. Both diets were in the proportion roughage:concentrate (V:C) of 20-80%, where the roughage used was corn silage. The initial body weight (BW) of the experiment was 38.64kg and the final one was 45.73kg. Every 7 days all the animals were weighed to follow the ADG and ECC and FAMACHA measured and when the animals reached the established slaughter weight they were transported to the refrigerator, where the humane slaughter took place. After slaughter and before the carcasses entered the cold chamber, the finish of each carcass was evaluated to correlate with the other parameters. For statistical analysis, Fisher's test was performed at a significance level of 5% for comparison between termination systems, in the SAS statistical program (v.9.1). The evaluations and average values of each treatment were then: FAMACHA CO 1.29; MS 1.42; ECC CO 2.32; MS 2.19; ADG CO 0.165g; MS 0.171g; CMS CO 67.97kg; MS 53.28kg; WeightQ CO 22.45kg; MS 21.23kg; yield CO 47.36%; MS 48.38% and CO finishing 3.67; MS 3.17. It can be concluded that for the indicators dry matter consumption and finishing, influence of the treatment was found, where the group that was offered soy mass as the main food source in the diet obtained lower values when compared to a diet formulated with traditional products. Still, regarding the finishing, in both treatments the values were within the desired by the industry and consumers. However, it is advisable to carry out more work evaluating this co-product in relation to commercial products, in addition to performance and the financial issue related to diets, to verify its applicability in practice.