Abstract: In order to determine of metabolizable protein of corn grain (CG), cottonseed meal (CSM), barley grain (BG), alfalfa hay (three cut) (AH), beet pulp (BP), tomato pomace (TP), lupin by products (LBP) and fish meal (FM) using in situ method, this study was carried out. Three fistulatd Gizil whether was used. Data were analyzed using of NAWAY package. Metabolizable protein of CG, CSM, first cut AH, second cut AH, third cut AH, BP, TP, LBP and FM was 3.5098, 23.2197, 4.8509, 6.6067, 6.3770, 6.6207, 4.8044, 6.3005, 16.3847 and 39.6774 g kg 1 DM. The FM and CG had highest and lowest MP, respectively. The results showed that test feed with high crude fiber had low degradability. The degradability of CP of test feeds can be used in MP determination and diet formulation.
A. Taghizadeh , A. Safamehr , V. Palangi and Y. Mehmannavaz , 2008. The Determination of Metabolizable Protein of Some Feedstuffs Used in Ruminant. Research Journal of Biological Sciences, 3: 804-806.