Effect of dietary multi-enzyme supplementation on the performance of broilers and layers
2009
Labay, M.H.
Two experiments were conducted to determine the effect of multi-enzyme supplementation on the nutrient digestibility, apparent metabolizable energy and performance of broilers and layers. The broiler experiment involved a total of 300 chicks randomly assigned to six treatments following a 3X2 factorial in completely randomized design (CRD). The six treatments consisted of T1) a corn SBM control diet, T2) control diet with multi-enzyme, T3) reduced ME diet, T4) reduced ME diet with multi-enzyme, T5) reduced ME, CP, Ca and P Diet and T6) reduced ME, CP, Ca and P diet with multi-enzyme. In the layer experiment 180 individually caged pullets were randomly allocated to six treatments following a 3x2 factorial in CRD. Similar treatments as in broiler study were followed in the layer experiment. In the broiler experiment, broilers fed diet with reduced ME, CP Ca and P had significantly increased digestibility of Ca and P and feed consumption, while those fed control diet had significantly increased body weight and body weight gain, livability and dressing percentage. Multi-enzyme supplementation of diets significantly improved body weight and body weight gain but lowered the livability of broilers. There was a significant interaction between diet and multi-enzyme on feed efficiency of birds. In the layer feeding trial, layers fed diet with reduced ME, CP, Ca and P had increased digestibility of Ca and P and decreased egg weight, while those fed control diet had increased egg production and shell thickness. Multi-enzyme improved shell thickness of eggs laid by the pullets. Also, an interaction between diet and multi-enzyme was obtained on the feed efficiency of layers. Although, there were consistent improvements obtained with multi-enzyme supplementation of the reduced diets in both broilers and layers, this had not been comparable to the performance obtained by birds fed the control diet.
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