Table 14.

Composition of the diets ¹, analyzed and calculated nutrients in different periods of the experiment, including two levels of L-Threonine (100 and 125% of the requirements, Cobb 500).

Ingredients, %	Starter, 1 to 8 Days		Grower, 9 to 18 Days		Finisher 1, 19 to 28 Days		Finisher 2, 29 to 35 Days
	100%	125%	100%	125%	100%	125%	100%	125%
Corn grain	55.42	55.32	60.32	60.40	62.10	62.10	63.77	63.81
Soybean meal (44% CP)	35.87	35.75	31.11	30.85	28.75	28.58	26.40	26.20
Soybean oil	3.78	3.78	4.20	4.20	5.10	5.10	5.80	5.80
Calcium carbonate	1.17	1.17	0.82	0.82	0.76	0.76	0.76	0.76
Dicalcium phosphate	2.04	2.04	1.92	1.92	1.72	1.72	1.74	1.74
Sodium bicarbonate	0.17	0.17	0.18	0.18	0.18	0.18	0.18	0.18
Salt	0.29	0.29	0.29	0.29	0.29	0.29	0.29	0.29
Methionine 2	0.35	0.35	0.32	0.32	0.30	0.30	0.28	0.28
Lysine 2	0.42	0.42	0.38	0.38	0.38	0.38	0.36	0.36
L-threonine 2	0.09	0.31	0.06	0.24	0.02	0.19	0.02	0.18
Mineral premix 3	0.20	0.20	0.20	0.20	0.20	0.20	0.20	0.20
Vitamin premix 3	0.20	0.20	0.20	0.20	0.20	0.20	0.20	0.20
	Nutrients Composition
AMEn, Kcal/kg	2911	2913	2992	2995	3072	3074	3132	3134
CP, % (Analyzed)	21	21	19	19	18	18	17	17
Calcium, % (Analyzed)	0.90	0.90	0.84	0.84	0.77	0.77	0.76	0.76
Total phosphorous. % (Analyzed)	0.76	0.76	0.71	0.71	0.64	0.64	0.63	0.63
Available phosphorous, %	0.45	0.45	0.42	0.42	0.38	0.38	0.38	0.38
Digestible threonine, %	0.83	1.04	0.73	0.91	0.66	0.83	0.63	0.79
Digestible arginine, %	1.34	1.34	1.21	1.20	1.14	1.13	1.07	1.06
Digestible lysine, %	1.28	1.27	1.14	1.14	1.08	1.08	1.02	1.01
Digestible methionine 4, %	0.63	0.63	0.58	0.58	0.55	0.55	0.52	0.52
Digestible methionine + cysteine, %	0.91	0.91	0.85	0.84	0.81	0.81	0.77	0.77
Arginine to Lysine	1.05	1.05	1.06	1.06	1.05	1.05	1.05	1.05
Sodium, %	0.17	0.17	0.18	0.18	0.18	0.18	0.18	0.18
Potassium, %	0.89	0.88	0.81	0.80	0.76	0.76	0.72	0.72
Chloride, %	0.21	0.21	0.21	0.21	0.21	0.21	0.21	0.21
DCAD 5, mEq/kg	242	242	223	222	212	211	202	201

¹ Aflatoxin B₁ was detected lower than 8 µg/kg. ² Evonik Nutrition & Care GmbH. ³ The premixes provided the following per kilogram of diet: zinc, 88 mg; iron, 16 mg; manganese, 96 mg; copper, 12.8 mg; iodine, 1 mg; selenium, 0.24 mg; vitamin A, 10,000 IU; vitamin D₃, 4000 IU; vitamin E, 36 mg; vitamin K₃, 3 mg; thiamine, 3.2 mg; riboflavin, 7.2 mg; pantothenic acid, 12 mg; niacin, 52 mg; pyridoxine, 3.36 mg; folic acid, 2.08 mg; vitamin B₁₂, 20 µg; biotin, 120 µg; and choline chloride, 400 mg. ⁴ The excess of calculated methionine converts to cysteine to provide methionine + cysteine. ⁵ Dietary cation–anion difference.