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Abstract
1. In two experiments each involving 2 000 Ross 1 broiler chickens in floor pens from 0 to 56 d of age, the effects of including guar meal at 50, 100 or 150 g/kg of the diet were investigated.
2. During the 0 to 28‐d period diets containing 50 or 100 g guar meal/kg supported only 85 and 69%, respectively, of the growth supported by the control diet, whereas during 28 to 56 d, birds fed on diets containing 100 or 150 g guar meal/kg gained 90 and 86% of the weight gained by control birds.
3. Neither toasting the meal, steam pelleting diets containing the meal nor supplementing these diets with 5 g methionine/kg had any appreciable effect on performance.
4. Addition of either of two enzyme preparations, MKC hemicellulase or betaganase M, improved growth; birds receiving 100 or 150 g guar meal/kg gaining 96 and 89%, respectively, of the weight gained by control birds from 28 to 56 d of age.