Determination of non-starch polysaccharides and true metabolizable energy content in several wheat varieties

The aim of this experiment was to determine non-starch polysaccharides and true metabolizable energy of five wheat varieties (Alvand، Zarrin، Sabalan، Sardari and Azar2). Non-starch polysaccharides of wheat varieties were measured with Englyst method by spectrophotometer. Nitrogen corrected true metabolizable energy of five wheat varieties was also determined with Sibbald precision feeding method. A completely randomized design with 24 roosters (Ross 308) at the age of 5 month was used in this experiment. The result of NSP content showed the total NSP، Insoluble NSP and soluble NSP varied of 9. 44 to 11. 96 %، 7. 10 to 9. 40 % and 1. 95 to 3. 15 % DM، respectively. The highest total NSP value (11. 96%) and Insoluble NSP value (9. 40%) were found in Aza2 variety، and the highest Soluble NSP value (3. 15%) was found in Alvand one. The lowest total NSP (9. 44%) and soluble NSP (1. 95%) values were resulted of Sabalan variety، and the lowest Insoluble NSP (6. 94%) was resulted of Zarrin variety. The TMEn content of wheat varieties varied from 3562. 32 Kcal/kg (Sabalan variety) to 3741. 64 Kcal/kg (Zarrin variety)، and TMEn content showed significantly differences as wheat varieties (P<0. 01). This experiment demonstrated that the metabolizable energy content of East Azerbaijan wheat varieties have a high variation and relative to method of cultivation.