ABSTRACT


Juan Guillermo Rosa W.1 y Rodrigo Venegas R.2
 
During 1970 two trials were carried out at the Carillanca Experiment Station in order to observe the performance of growing finishing pigs (28-100 Kg live weight) when feeded with acidulated rapeseed soapstock or beef tallow in oat rations. In trial I fatty acids from the refining of adible rape-seed oil were used at the following levels: 0-2-4-6 and 8%. In trial II the pigs received beef tallow obtained from the slaughter house, at the same levels as in trial I.The fatty acids and beef tallow did not produced significant increases in live weight (P ≤ 0.05) . Fats showed a tendency to increase live-weight when forming part of the ration. The feed consumption was decreased when the fats levels were increased, but these differences were not significantly different (P ≤ 0.05).Feed efficiency was not significantly (P ≤ 0.05) affected when acidulated rape-seed soapstock was included. When beef tallow was included in pig rations, efficiency in-creased at the 6 and 8% levels to 4.34 and 4.17 respectively. At the 0-2 and 4% levels, efficiency were 4.81-4.87 and 4.68 respectively. These differences were significatly different (P ≤ 0.05).The addition of fat supplements in pig rations did not altered the carcass characteristics of the pigs in trial I and II. This work confirms that energetic level increments up to 8% in the form of animal and/or vegetable fats added to oat rations are not able to alter substantially the performance of growing finishing pigs.
Keywords:
1Ing. Agr., Proyecto Producción Porcina, Estación Experimental Carillanca, Instituto de Investigaciones Agropecuarias, Casilla 58-D, Temuco, Chile.
2Ing. Agr., Corporación de Fomento, Castro, Chile.