Effect of Vitamin A Level of Diet on Feed Conversion and Utilization of Energy by Growing Chickens

The Effect of Dietary Vitamin A, Ambient Temperature and Rearing Location on Growth, Feed Conversion and Vitamin Liver Storage of White Leghorn Pullets

“…These data agree with the work of Reid et al (1955) in which it was reported that the amount of vitamin A stored in the liver of chicks was an indication of the amount of the vitamin in the feed. Shellenberger et al (1960) found only minor amounts of vitamin A in the liver with the feeding of 400 U.S.P. units vitamin A, and marked deposition of the vitamin with 1,750 or 2,000 U.S.P.…”

Effect of Vitamin A on Growth, Egg Production and Reproduction of Japanese Quail

“…Hatchability of eggs from birds fed both low and high en- growth responses to vitamin A supplementation in the low or high energy diets at levels of 550 to 4400 units/kg. Shellenberger et al (1960) suggested that reserves of vitamin A at hatching would serve a faster growing bird for a greater fraction of its productive life and that maintenance needs should be less for birds making production weights in a shorter time. The chicks in this study were obtained from a stock colony fed a commercial breeder diet containing high levels of vitamin A.…”

“…productive energy/kg., respectively ( Table 1). Both basal diets had a good distribution of amino acids, vitamins and other micronutrients based on known nutritional requirements for fast-growing broiler strain chickens (Shellenberger et al, 1960). Both basal diets had a good distribution of amino acids, vitamins and other micronutrients based on known nutritional requirements for fast-growing broiler strain chickens (Shellenberger et al, 1960).…”