Detetmination of apparent metabolizable energy of wheat varieties with or without enzyme supplementatin using complete diet method in broiler chicks

The aim of this experiment was to determine metabolizable energy of five wheat varieties (Alvand, Zarrin, Sabalan, Sardari and Azar2) with or without enzyme supplementation (multi enzyme carbohydrase Kemin). Chemical composition and nitrogen corrected apparent metabolizable energy of wheat varieties was determined by standard and complete diet (wheat-soybean meal) method respectively. Ten diets containing 62% of experimental wheat varieties and enzyme (0 or 0.2 gr/Kg of diet) were used. Sixty 21-day old male broiler chicks, with average initial body weight 751±3.32 g were used in a completely randomized design in a factorial arrangement. The AMEn values of wheat experimental varieties did not have significant difference. The AMEn content of wheat varieties ranged from 3120.25 to 3191.29 Kcal/kg, and the highest and lowest AMEn content were related to Zarrin and Sabalan varieties, respectively. The average AMEn content of wheat varieties was 3150.07± 22.37 Kcal/kg. Enzyme supplementation increased the AMEn content of wheat grain up to 11.45% (P<0.01). No interaction was found between wheat varieties and enzyme addition on AMEn content. The equation of AMEn = 4827.03-986.52 Ash+144.15 EE (R2= 0.99) showed the best fit as the predictor of AMEn content of wheat from chemical composition. This experiment demonstrated that kemin a non – starch polysacide degrading enzyme can improve the metabolizable energy content of wheat grain.