Oxidative Stability of the Meat of Broilers Fed Diets Supplemented with Various Levels of Blackcurrant Extract (Ribes nigrum L.) during Different Time Period

Table 1

Composition of the experimental diets fed to broilers.

Diets	Grower (g/kg)
Groups and period of BC extract supplementation	Control (I–C)	II/III; 25–35 d/15–35 d	IV/V; 25–35 d/15–35 d
Duration of BC extract suppl.	0 d	10 d/20 d	10 d/20 d
Components (g/kg)
Maize	250.00	249.38	248.75
Wheat	285.50	284.79	284.07
Soy bean meal	364.80	363.89	362.98
Rapeseed oil	59.20	59.05	58.90
Chalk	12.60	12.57	12.54
Dicalcium phosphate	14.30	14.26	14.23
Sodium chloride	3.60	3.59	3.58
Supermix DS broiler	10.00	9.98	9.95
Blackcurrant extract (BC)	0.00	1.25	2.50
Total BC polyphenols (mg/kg)	0.00	288.40	576.68
Total BC anthocyanins (mg/kg)	0.00	225.00	449.90
Energy value (MJ) and essential nutrients (g/kg)
ME, MJ/kg	13.10	13.10	13.09
Dry matter	898.70	898.65	898.81
Crude protein (N × 6.25)	210.00	209.84	209.68
Crude fiber	40.00	39.99	39.97
Crude fat g/kg	88.10	88.00	87.91
Crude ash g/kg	55.60	55.54	55.49
Nitrogen-free extractives	505.00	505.35	505.70
Ca	10.00	9.98	9.95
P available	4.70	4.69	4.68
Na	1.70	1.70	1.69

Chemical composition of premix per 1 kg of diet: CaCO₃, 0.9 g; P, 0.8 g; S, 250 µg; Mn, 80 mg; J, 1 mg; Zn, 80 mg; Fe, 70 mg; Co, 400 µg; Se, 300 µg; retinol, 7.8 mg; cholecalciferol, 75 µg; a-tocopherol, 60 mg; menadione, 3.25 mg; thiamin, 3.03 mg; riboflavin, 8 mg; pyridoxine hydrochloride, 5.53 mg; cyanocobalamin, 30 µg; pantothenic acid, 15 mg; biotin, 200 µg; nicotinic acid, 60 mg; folic acid, 2 mg; choline, 500 mg; Lys, 1.85 g; Met, 2.25 g; Tre, 0.6 g; phytase; coccidiostat-salinomycin.