Animal performance and carcass characteristics from confined lambs fed on concentrate feed and additives

Abstract

The number of sheep flocks in Brazil is increasing. It is known that lambs must be slaughtered when young for producing quality meat. The current study evaluated the inclusion of protected methionine, protected lysine, lysophospholipid and amylolytic enzymes in a diet to lambs and their effects on weight gain and quantitative carcass traits at slaughtering. Eighty non-castrated male crossbred Dorper x Santa Inês lambs, 20.57 ± 4.33 kg live weight, were used. The feedlot lasted 64 days and 60 animals were slaughtered. There were no differences for live weight, daily feed intake, feed conversion and average daily weight gain at the first 28 days of feedlot. From the 28th day lysophospholipid treatment presented the highest live weight. Lysophospholipid and amylolytic enzyme presented the best performance in average daily gain, followed by protected methionine, control and protected lysine. Lysophospholipid treatment presented higher daily feed intake rates than protected lysine and protected methionine. Feed conversion was lower for amylolytic enzyme and higher for control. No changing in carcass traits was reported due to additives. Better performance may be achieved with feedlot lambs fed on diets with the addition of amylolytic enzyme and lysophospholipid at the finishing phase.

Inoculation of corn silage with Lactobacillus plantarum and Bacillus subtilis associated with amylolytic enzyme supply at feeding. 2. Growth performance and carcass and meat traits of lambs

“…Alterations in carcass and meat traits of lambs due to amylolytic enzyme supplementation are unlikely because of the lack of response of DMI and ADG. Moreover, extensive research over the years has failed to produce evidence that dietary supplementation with amylolytic enzymes has any effect on carcass traits of lambs (McAllister et al, 2000;Prado et al, 2015).…”

“…Thereby, increasing total amount of VFA production might increase FA synthesis in adipose tissue. Although previous research has suggested that dietary supplementation with amylolytic enzymes have no effect on the carcass traits of lambs (McAllister et al, 2000;Prado et al, 2015), to the best our knowledge, meat quality and FA composition has not been appropriately examined in finishing feedlot lambs fed diets supplemented with amylolytic enzymes.…”

Haemato-Biochemical Profile of Yankasa Rams Fed Varying Levels of Panicum maximum Concentrate Mix under Intensive Feedlot in Southwestern Nigeria

“…The CP content of the concentrate mix used in this study was higher than the CP of most grasses including Pm but lower than the CP of 20.11g kg -1 used to supplement confined lambs which were kept on Brachariabrizantha grass pastures [27]. The CP values in the experimental treatments 1 to 5 fell within the limit of 9 to 14% recommended for growing sheep [28].…”

Utilization of Trimming Waste of Mandarin Trees as Feed for Small Ruminants: 3. Evaluation of Growth Performance and Carcass Traits for Barki Lambs

“…Increasing ADG reflected on total gain during all period, hence, TR recoded the highest value (P<0.05) compared to CR and UR. Increasing ADG for TR group may be due to many reasons such as improving digestion coefficient of CP, higher digested protein intake (g/d) which probably enhanced the utilization and the availability of essential nutrients especially protein (Kewan et al, 2019), increasing DMI (Khir, et al, 2015), presence of probiotic and amino acids of feed (Prado et al, 2015). Adding enzymes and some amino acids in diets based on grass pastures for lambs led to improvement in ADG (Prado et al, 2015).…”

“…Increasing ADG for TR group may be due to many reasons such as improving digestion coefficient of CP, higher digested protein intake (g/d) which probably enhanced the utilization and the availability of essential nutrients especially protein (Kewan et al, 2019), increasing DMI (Khir, et al, 2015), presence of probiotic and amino acids of feed (Prado et al, 2015). Adding enzymes and some amino acids in diets based on grass pastures for lambs led to improvement in ADG (Prado et al, 2015). Generally, Wadhwa, et al (2015) suggested that citrus and winery byproducts have been widely used as an alternative feed and energy source in ruminant diets with no detrimental effects on animal performance.…”