Chemical composition of classified garbage for pig feeding

The chemical composition of garbage for pig feeding was characterized throu gh the analyses of dry matter (DM), crude protein (CP), ether extract (EE), crude fibre (CF), ash and nitrogen free extract (NFE) of 127 samples obtai ned throughout a year from two central districts of Montevideo, Uruguay and classified at three rearing centres in the suburbs of the city. Means were (%): 30.61, 16.81, 27.73, 6.80, 8.70 and 39.96 for DM, CP, EE, CF, ash and NFE, respectively. Results were analyzed according to the collection day a nd the classification at the rearing unit. Digestible energy (DE) was estim ated by the prediction equation DE = 4151 - 12.2 C + 2.3 CP + 3.8 EE - 6.4 CF with a mean of 17.34 KJ/kg. Residues were characterized by a large varia bility in chemical composition (coefficients of variation between 25.6 and 56.5 for DM and CF, respectively). There were no statistical differences in garbage sample (P > 0.10) with the day of the week. However, there was a d ifference in CP (P < 0.01) between Monday and the rest of the week. Between the two units compared, there were differences for EE (P = 0.03) and NFE ( P = 0.08). It is suggested that garbage can be an interesting alternative f or pigs, without neglecting the sanitary aspects involved.