Table 1 Ingredients and proximate composition of the experimental diets.

Diets	K0	K1	K2	K3	K4	K5	K6	K7	K8
*Ingredients (g kg⁻¹ as feed basis)*
Fish meal (600 g/kg protein)	300	225	150	75		225	150	75
SBM (490 g/kg protein; defatted, toasted)		75	150	225	300	51	126	201	276
Inactive BY (400 g/kg protein)						24	24	24	24
Rapeseed meal	250	250	250	250	250	250	250	250	250
Corn meal	110	180	210	230	180	220	200	230	210
Wheat meal	290	220	190	170	220	180	200	170	190
Soybean oil	10	10	10	10	10	10	10	10	10
Vitamin-mineral mix ^¥	20	20	20	20	20	20	20	20	20
Binder (Neubabonder 100)	20	20	20	20	20	20	20	20	20
*Proximate composition* (g kg⁻¹ of diet)
Crude protein	285.4	280.0	282.5	297.2	278.6	298.2	287.8	290.5	284.9
Crude lipid	50	41	45	36	31	45	42	37	32
Crude fiber	34	38	36	42	41	39	37	41	37
Ash	92	70	77	56	40	75	66	56	41
Dry matter	867	852	843	873	805	868	845	842	823
NFE	405.6	423.0	402.5	441.8	414.4	410.8	412.2	417.5	428.1
GE (MJ kg⁻¹)	17.45	17.34	17.29	17.25	17.41	17.35	17.36	17.3	17.31

K0, control diet; K1, 25% SBM; K2, 50% SBM; K3, 75% SBM; K4, 100% SBM; K5, 25% (17%SBM + 8%BY); K6, 50% (42%SBM + 8%BY); K7, 75% (67%SBM + 8%BY); K8 100% (92%SBM + 8%BY); NFE - nitrogen free extract (%NFE = %Dry matter-(% Protein + % Ash + % Lipid + % Fiber); GE – Gross Energy; ¥Vitamine – mineral mix provided the following: Vit.A, 2.000 000 IU; Vit.D3, 50 000 IU; Vit E (DL-α-Tocopherol), 5000 mg; Vit.K3 90 mg; Vit. B1, 100 mg; Vit.B2, 960 mg; Vit.B6, 1.000 mg; Vit. B12, 2 mg; Vit. B3, 1.400 mg; Pantothenic acid, 1.500 mg; Folic acid, 150 mg; Biotin, 50 mg; Vit. C, 5.000 mg; Inositol, 5.000 mg; Choline chloride, 40. 000 mg; Mn, 250 mg; Zn, 2.000 mg; Fe, 3.000 mg; Cu, 500 mg; I, 100 mg; Co, 10 mg; Se, 25 mg; Ca, 10 g; P, 3,5 g; Antioxidant BHA (E320) 10.000 mg; Carrier: Flower, up to 1.000 g; Origin of the feed ingredients: FM - Adria d.d., SBM – IREKS Aroma d.o.o., BY - Sladorana d.d., Rapeseed meal - Bio Uljarice d.o.o.

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