Evaluation protein of different forage to concentration ratios using Cornell Net Carbohydrate and Protein and Nordic Feed Evaluation Systems

In order to compare nutritional value of different forage to concentration ratios, the experiment was conducted in two stages. Degradability parameters and amount of dry mater and protein of diets disappearance were determined at 0, 2, 4, 8, 16, 24, 48, 72 and 96 hours after feeding using technique of nylon bags. Different protein sections were measured by Cornell Net Carbohydrate and Protein and Nordic Feed Evaluation Systems. Effective degradability (%) (In passage rate of %2) of diets with higher percentage of concentration was significantly more than other ones (P<0.05). Faba bean the highest and alfalfa had the lowest values in parts non protein nitrogen and true soluble protein (P<0.05). Results showed, the only observed difference was about B3 of alfalfa which was significantly higher than other ones. According to increasing of forage percentage was showed decreasing soluble crude protein and increasing potentially degradable crude protein (P<0.05). However, there was no significant difference between soluble crud protein of faba bean and diets containing 75 and 50 percentage of concentration. The amount of total tannin (1.97%) and condensed tannin (0.34%) of faba bean was higher than other treatments (P˂0.05) and with increasing forage ratio, tannin decreased (P>0.05). According to the protein classification in Cornell Net Carbohydrate and Protein and Nordic Feed Evaluation Systems, it seems to be more accurate values can be estimated.