Effect of processing on protein and starch parameters of two barely varieties using NorFor system

This research was aimed to evaluate effects of processing on protein and starch degradability parameters of hulled and hull-less barley grain using NorFor system. Two barley cultivar grain treatments, NaOH, Formaldehyde and urea were used at 35, 4 and 35 g/Kg DM, respectively. Using test data derived from the measurement of ruminal degradability of crude protein and starch barlely, the soluble protein (sCP), protein degradation potential (pdCP), fixed rate analysis (kdCP) parameters and starch including soluble starch (sST), starch degradation potential (pdST) and fixed rate analysis were estimated in NorFor system. For measuring ruminal egradability of crude protein, nylon bag method and three rams were used at incubation times 0, 2, 4, 8, 16, 24 and 48 h. The results showed that the hull-less and hulled barley treated with a solution of urea has the highest amount of protein (sCP, 561 and 610 g per kg CP) which had a significant difference with other treatments. The starch solution (sST) in without processing hull-less barley had the highest value which was significantly different from other treatments (P<0.05). The starch degradation potential was the highest in non-processed barley compared to hull-less barley treatments. In general, the lowest sCP and sST were in Hullless barley+ NaoH and Hulled barley + urea in NorFor system, repectively. This would be important for protein and starch passage from rumen.