effect of different level of commercial multi enzymes on wheat metabolizable energy and nutrient digestibility

the purpose of this study was to determine the effect of two levels of four commercial multi-enzymes on the apparent metabolizable energy corrected for nitrogen (amen) and digestibility of crude fat, crude protein, dry matter, and organic matter in broiler chickens through total excreta collection method. one hundred thirty male broiler chicks were assigned to 45 metabolic cages involving 9 treatments, and 5 replicates of 3 chicks each. a control diet was made so that wheat was the sole source of energy supply. eight experimental diets were prepared with the addition of one or two recommended levels of each commercial multi-enzymes to the control diet. the chickens had free access to feed and water ad-libitum from 17 to 23 days of age. gross energy, crude protein, crude fat, organic matter, and dry matter were measured in feed and excreta samples. addition of one or two recommended levels of different commercial enzymes to diet significantly increased (p< 0.05) amen and apparent digestibility of fat, protein, dry matter, and organic matter in wheat. however, there was not a significant difference between the levels and the four types of added commercial enzymes on amen and nutrient digestibility values. the results revealed that metabolisable energy value of falat wheat improved by 70 to 120 kcal per kg, regardless of the type and activity of the four commercial enzymes used in this study.