Composition of diets†.

1Contained 50.7% of L-lysine in the form of L-lysine sulfate, 0.1% Methionine, 0.1% Cystine, 0.3% Threonine, 0.1% Tryptophan, 0.6% Arginine, 0.3% Isoleucine, 0.5% Leucine, and 0.4% Valine.2Provided per kg of diet: Selenium-250 µg; Vitamin A (retinyl palmitate)-4.54 mg; Vitamin D3 (cholecalciferol)-0.069 mg; Vitamin E (alpha-tocopherol)-11.94 mg; Menadione- 1.1 mg; Vitamin B12-12 µg; Biotin-41 µg; Choline-447 mg; Folic acid-1.4 mg; Niacin-41.3 mg; Pantothenic acid-11 mg; Pyridoxine-1.1 mg; Riboflavin-5.5 mg; Thiamine-1.4 mg; Iron-282 mg; Magnesium-125 mg; Manganese-275 mg; Zinc-275 mg; Copper-27.5 mg; Iodine-844 µg.†Diets were fed to broiler chickens from 15 to 21 days of age in Experiment 1 and from 1 to 21 days of age in Experiment 2.