A study on the effects of different ruminally degradable to ruminallyundegradable protein ratio on performance and nutrient digestibility in fattening male lambs

This study was conducted toevaluate the effects of different ruminally degradable to ruminallyundegradable protein ratio on performance and nutrients digestibility in fattening male lambs. In the first experiment, degradability of dry matter and crude protein of fish meal, soybean meal and concentrate in diets was estimated in different incubation times (0, 4, 8, 12 and 24 h) with two fistulatedsheep of Zel breed which were fed to their maintenance requirement. The effective degradability of dry matter and crude protein in fish meal was significantly lower than in soybean meal (P