NUTRITIVE-VALUE OF MEAT AND BONE MEAL FOR GROWING PIGS

Six barrows, with an average initial body weight of 88 kg, were used i n a digestibility and balance experiment to study the nutritive value of meat and bone meal (MBM). The MBM, which contained 478 g crude prot ein and 322 g ash/kg dry matter (DM), was included in barley-based die ts at two levels: 100 and 200 g/kg. The experiment was conducted accor ding to a two-period reversal design. The apparent digestibilities of organic matter, crude protein and crude fat in the MBM were 0.910, 0.9 09 and 0.730, respectively. The MBM was calculated to contain 434 g di gestible crude protein, 14.26 MJ metabolizable energy and 8.82 MJ net energy/kg DM. The efficiency of nitrogen utilization decreased with an increasing MBM supply. Due to relatively high mineral intakes, the ap parent digestibilities of calcium and phosphorus remained low.