[Effect of fasting on N-metabolism of broilers]

Four male broilers each were killed 3, 6, 12 and 24 hours after the last food intake and divided into nine parts, The significant diminishing of the fresh liver mass in the test period amounted to 31%. With the increasing fasting time the N-content per g dry matter increased in liver, pancreas, muscles and the rest of the carcass. Because of the decrease in mass a statistically proved diminishing of the total N mass could be registered. The most significant changes were established in the total content of N soluble in TCA in the organs. The decrease in % from the first to the fourth measuring point amounted to 44% (liver), 40% (kidneys) and 28% (small intestines). Concerning these three organs we can maintain that the changes in the total N-content registered in the 24 hours fasting are chiefly limited to the TCA-soluble quota.