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Abstract
In a feeding trial the impact of dietary fortification of an exogenous mono component protease enzyme with or without its matrix values (ME 31.5 Kcal, CP 0.84%, Methionine 0.018%, lysine 0.05%, threonine 0.034%) on growth performance traits, Crude protein digestibility, serum parameters, selected immune parameters, total counts of ileal clostridia species, carcass traits as well as duodenal histomorpholoigcal picture were studied. The economic feasibility of this enzyme supplementation was also evaluated. A total of 300 day old chicks (Cobb500) were randomly assigned to five separate floor pens equal experimental groups with three replicates (20 birds /replicate). Birds were fed either on corn{u2013}soybean meal basal diets (starter- grower and finisher) without any supplementation (G1) and served as control group, or basal diets to which protease enzyme was added on top at a rate of 200 ppm (G2), however birds in (G3) were fed on the basal diets to which protease was added at the same inclusion level but subtracting the whole matrix value of the enzyme, meanwhile birds in (G4) were fed on the fortified basal diets after subtracting only the metabolizable energy matrix value of the enzyme while birds in (G5) were reared on the fortified basal diets after subtracting only the crude protein as well as amino acids matrix value of the enzyme. The experiment was extended for five weeks