Using complete diet and Sibbald methods to determine the metabolizable energy of 5 Iranian wheat varieties

作者：Seyedi A Hasanzadeh^*; Janmohamady H; Hosseinkhani A; Shakouri M D

来源：Journal of Applied Poultry Research, 2013, 22(3): 388-395.

DOI：10.3382/japr.2011-00516

• nitrogen-corrected apparent metabolizable energy
• nitrogen-corrected true metabolizable energy
• wheat
• broiler
• enzyme

To determine the ME contents of 5 Iranian wheat varieties (Alvand, Zarrin, Sabalan, Sardari, and Azar2), 2 experiments were conducted. In experiment 1, the AME(n) content of 5 wheat varieties was determined by complete diet method containing 62.06% of a test cereal grain (with or without an appropriate commercial enzyme). Diets were consumed ad libitum by sixty 21-d-old Ross 308 male broiler chicks. The AME(n) values (kilocalories per kilogram of cereal grain, DM basis) were determined from gross energy of diet and collected excreta during 56 h at the end of the experiment. In experiment 2, 36 adult roosters were used to determine the TMEn content of the varieties by the precision feeding method. The AME(n) content was not significantly affected by varieties. The AME(n) of wheat varieties without enzyme supplementation varied from 3,120 to 3,191 kcal/kg. The AME(n) was significantly affected by enzyme supplementation. Enzyme addition produced an average increase of 11.45% AME(n) content of wheat varieties. The TMEn of wheat varieties varied from 3,788 (Sabalan variety) to 3,947 kcal/kg (Zarrin variety), and TMEn content was affected significantly by wheat varieties. Strong correlation was seen between broiler chick performance and AME(n) of wheat varieties that determinate with the complete diet method in wheat-based diets. It is suggested that the AME(n) obtained from the complete diet method should be applied in young broiler diets formulation.

• 出版日期2013-9