Abstract
REDUCED growth and feed efficiency of chicks and poults fed diets with western barley during the first 4 weeks of life have been observed by many investigators. Arscott (1963) and Arscott and Ross (1960) observed growth depressions of broilers raised to 8 weeks of age. Berg (1961) found that supplementation of barley-containing rations for Leghorn pullets with crude fermentation products containing enzymes increased growth rate from 0 to 8 weeks of age; however, during the period 8–21 weeks these products did not improve rate of gain but did reduce litter moisture. Likewise, enzyme supplementation did not affect rate of lay, feed efficiency or egg quality but did reduce litter moisture for the laying hen (Berg, 1959). Malik (1962) reported that growth of chicks after 4 weeks of age was not depressed by using barley in the diets.The addition of an antibiotic or an enzyme concentrate to poult diets …
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