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

Prado, Tayrone F.; França, Aldi F.S.; Meirinhos, Maria Lúcia G.; Peron, Hugo J.M.C.; Ferreira, Reginaldo N.; Oliveira, Leonardo G.; Corrêa, Daniel S.

doi:10.1590/0001-3765201520140415

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Agrarian Sciences • An. Acad. Bras. Ciênc. 87 (4) • Oct-Dec 2015 • https://doi.org/10.1590/0001-3765201520140415 linkcopy

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

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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 28^th 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.

amylolytic enzyme; lysine; lysophospholipid; methionine; ovine

Ingredients				Treatments
Ingredients		CON	ENZ	LYS	LYP	MET

	Diet composition	CON	ENZ	LYS	LYP	MET
Cottonseed pie (g/kg)	550.0	550.0	550.0	550.0	550.0
Corn grain (g/kg)	420.0	420.0	417.0	420.0	419.0
Minerals and vitamin premix* (g/kg)	30.0	30.0	30.0	30.0	30.0
Enzyme (g/kg)	-	0.760	-	-	-
Lysine (g/kg)	0.845	0.845	1.183	0.845	0.845
Lysophospholipid (g/kg)	-	-	-	0.380	-
Methionine (g/kg)	0.425	0.425	0.425	0.425	1.555
	Chemical Composition
Dry matter (DM) (g/kg)	905.0	905.0	905.0	905.0	905.0
CP (g/kg of DM)	201.1	201.1	201.1	201.1	201.1
EE (g/kg of DM)	74.1	74.1	74.1	74.1	74.1
NDF (g/kg of DM)	342.3	342.3	342.3	342.3	342.3
ADF (g/kg of DM)	215.0	215.0	215.0	215.0	215.0
MM (g/kg of DM)	65.2	65.2	65.2	65.2	65.2

Time			Treatments			Mean	P1*	P2**	P3***
(days)	CON	ENZ	LYS	LYP	MET
(days)	CON	ENZ	LYS	LYP	MET
				BW (kg)
0	20.89^aC	20.49^aC	20.18^aC	20.98^aC	20.31^aC	20.57^C
28	28.53^aB	28.25^aB	27.34^aB	28.67^aB	28.37^aB	28.23^B	0.0137	<0.0001	<0.0001
64	35.27^bcA	36.75^abA	33.80^cA	37.77^aA	35.65^bA	35.85^A
64	35.27^bcA	36.75^abA	33.80^cA	37.77^aA	35.65^bA	35.85^A
Mean	28.23^ab	28.50^ab	27.10^b	29.14^a	28.11^ab
				MDG (kg day^-1)
0-28	0.273^aA	0.278^aA	0.256^aA	0.275^aA	0.288^aA	0.274^A
28-64	0.187^cB	0.236^abB	0.179^cB	0.253^aA	0.202^bcB	0.211^B	0.0022	<0.0001	0.0097
0-64	0.224^bc	0.254^a	0.213^c	0.262^a	0.240^ab
				FC (kg kg^-1)
0-28	4.45^aB	4.40^aB	4.45^aB	4.43^aB	4.17^aB	4.38^B
28-64	6.93^aA	5.56^cA	6.43^abA	5.84^bcA	6.10^bcA	6.17^A	0.0105	<0.0001	0.0209
0-64	5.60^a	5.00^b	5.38^ab	5.18^ab	5.08^ab
				DFI (kg day^-1)
0-28	1.204^aA	1.217^aA	1.134^aA	1.210^aB	1.198^aA	1.193^B
28-64	1.295^bA	1.307^bA	1.153^cA	1.476^aA	1.228^bcA	1.292^A	0.0051	<0.0001	<0.0001
0-64	1.255^ab	1.268^ab	1.145^b	1.360^a	1.214^b

Variable			Treatments			Mean	P	CV (%)
Variable	CON	ENZ	LYS	LYP	MET

SW (kg)	CON	ENZ	LYS	LYP	MET	34.82	35.51	38.18	35.99	34.67	35.83	0.7179	17.43
HCW (kg)	17.88	18.24	18.36	17.98	18.30	18.15	0.5194	4.17
HCY (g/kg)	50.27	51.34	51.55	50.59	51.42	51.04	0.5572	4.21
CCW (kg)	17.44	17.68	17.83	17.41	17.83	17.64	0.4474	4.07
CCY (g/kg)	49.00	49.69	50.02	48.91	50.04	49.53	0.5390	4.21
WLC (g/kg)	2.61	3.22	2.65	3.26	2.79	2.91	0.7183	49.30

	SW	HCW	HCY	CCW	CCY	WLC
SW	1,000	0.966	-0.387	0.970	-0.255	0.459
HCW	<0.001	1,000	-0.137	0.997	-0.010	0.393
HCY	0.003	0.300	1,000	-0.164	0.945	-0.372
CCW	<0.001	<0.001	0.215	1,000	-0.015	0.461
CCY	0.050	0.938	<0.001	0.911	1,000	-0.048
WLC	<0.001	0.002	0.004	<0.001	0.718	1,000

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[TFN01] *Nutrient/kg Minerals and vitamin premix: Calcium = 262 g; Phosphorus = 60 g; Sulfur = 50 g; Magnesium = 40 g; Sodium = 30 g; Iron = 3,000 mg; Zinc = 1000 mg; Manganese = 900 mg; Fluoride = 600 mg; Copper = 221 mg; Iodine = 15 mg; Selenium = 10 mg; Cobalt = 5 mg.