Effect Of Dietary Xylam 500 Enzyme And Metabolizable Energy Level On The Performance And Carcass Characteristics Of Broliers

Abstract

This experiment was designed to study the effect of dietary xylam500

commercial enzyme (xylanase + amylase) and dietary metabolizable energy leveland their interaction on the performance and carcass characteristics of the broiler.

The completely randomized design with factorial arrangement (2x2) was used in the

experiment .Two levels of xylam enzyme (0 and 500 gm/ton/feed) were replicated 5

times with the each of the two levels of metabolizable energy (3000 and 3200 Kcal/Kg),120one week old ,unsexed ross-2308 broiler chicks were used and experimentally fed for 6 weeks .all diets were formulated to be iso-nitrogenous (23% crude protein).

Health of the stock and performance parameters were recorded, measures of

carcass parameters and financial evaluations were monitored.

The results indicated that the body weight gain, feed intake feed efficiency,

mortality rate, percentages of dressing, giblets (liver, heart and gizzard),

commercial cuts (thigh, drumpstick and breast), meat of commercial cuts, meat

chemical composition aspects (moisture, fat, protein and ash). And subjective meat attributes of broiler chicks were not affected significantly by the addition of xylamcommercial enzyme.

The effect of dietary metabolizable energy levels on the body weight gain feed

efficiency , mortality, percentage of dressing, giblets , commercial cuts, meat of

commercial cuts, meat chemical composition parameters subjective meat attributes was not significant (P>0.05) whereas feed intake decreased significantly 0.05) dietary metabolizable energy increased. >(PResults of this study revealed that interaction between the commercial enzyme and the level of metabolizable energy was not significant in the performance and the characteristics of broilers.

Economical study indicated that diet containing 3000 kcal/kg metabolizable

energy with or without commercial enzyme yielded higher return compared with diet contained 3200 kcal/kg with or without enzyme.