EFFECT OF ENZYME SUPPLEMENTATION ON PERFORMANCE OF BROILER CHICKS | ||||
| Fayoum Journal of Agricultural Research and Development | ||||
| Article 4, Volume 19, Issue 2, July 2005, Page 33-41 PDF (504.83 K) | ||||
| Document Type: Research articles. | ||||
| DOI: 10.21608/fjard.2005.197829 | ||||
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| Authors | ||||
| H.F.A. Motawe; T.M. El-Afifi; M.S. Haready; A.H.M. Gomaa | ||||
| Central Lab. for Food and Feed (CLFF), A.R.C, 588 Orman, Giza, Egypt | ||||
| Abstract | ||||
| An experiment was conducted to study the effect of adding a commercial enzyme (Nutrase Xylan) to diets of male broiler chicks on their productive performance. The enzyme is of bacterial origin (Bacilluis subtilis) which contains Endo-1,4-β-xylanase combined with α-amylase. The enzyme was added to a balanced corn/soy diet at two levels, (0.05% and 0.1%). The experiment was designed to test two different energy levels against a normal energy requirement (recommended oil addition). A total number of 150 one-day old male Ross chicks was individually weighed and randomly distributed among five groups of 30 chicks each. The control was fed a starter-grower diet (0-28 day old) which contained 22% CP and 3100 Kcal ME/kg feed, 1.72% oil and a finisher diet (28-42 day old) which contained 19% CP and 3200 Kcal ME/kg feed and 3.51% oil. The control group were fed dites which contained normal energy, 3100 and 3200 Kcal ME for starter/grower and finisher, respectiviley. The Control group compared with four treated groups as follows: En 1/0.05 (3040 and 3060 Kcal ME/ Kg diet) with 0.05% enzyme; En 1/0.10 same as En 1/0.05 but with 0.10% enzyme; En 2/0.05 (2970 and 2920 Kcal)l with 0.05% enzyme and En 2/0.10 same as En 2/0.05 but with 0.10% enzyme. /The results obtained were as follow: - No significant difference was found between supplementation of enzyme at 0.05% or 0.1% levels over all the experiment. - No significant increase in body weight (BW) between the control group and En1 groups in either of starter/grower or finisher: 953g vs. 946g and 945g; 1791g vs. 1764g and 1743g, respectively. No significant differences in BW were found between both En 2 groups overall the experiment. - Feed intake (FI) showed no significant difference between the control group and En1 treated groups in starting/growing and finishing periods. In addition, in the whole period, no significant difference in FI was found between En2 groups. - Weight gain (WG) showed no significant difference in starting/ growing and finishing periods between the control group and En1 groups (911g vs. 904 and 903g). No significant difference in WG was found between En2 treated groups through out the experiment. - The enzyme treated groups containing low energy levels (En 1/0.05 and En 1/0.1) gave similar results of body weight as obtained from the control group (normal energy or recommended oil requirement). However, starter/grower and finisher diets had 1.99% and 4.4% reduction in ME/kg values (DM), respectively. | ||||
| Keywords | ||||
| Broilers; feed enzymes; energy restriction; vegetable oil; chick performance | ||||
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