EFFECT OF HAVING REDUCED THE LEVEL OF PROTEIN IN THE DIET OF FATTENING PIGS. IT'S RESULT IN THE PERFORMANCE OF THE PIGS SUPPLEMENTED WITH SYNTHETIC AMINOACIDS AND COCONUT OIL | EFECTO DE LA DISMINUCIN DE LA PROTENA DE LA DIETA EN EL COMPORTAMIENTO DE CERDOS EN CEBA, CON SUMINISTRO DE AMINOCIDOS SINTTICOS Y ACEITE DE COCO

Spanish; Castilian. Se utilizaron 21 cerdos hembras y machos castrados de la lnea YL x CC21, con un peso promedio de 63 kg, distribuidos en tres tratamientos segn un diseo completamente aleatorizado con siete repeticiones por tratamiento, con el objetivo de determinar el comportamiento productivo de cerdos alimentados con diferentes niveles de protena y suplementadas con lisina, metionina y aceite de Coco. Los tratamientos consistieron en un control con 16% de protena bruta, un segundo tratamiento utilizando pienso de 13% de protena bruta con adicin de aminocidos sintticos y un tercer tratamiento donde se suministr un pienso con 13% de protena bruta, con adicin de aminocidos sintticos y aceite de Coco. Los pesos iniciales, la ganancia total, la ganancia media diaria, el consumo total, el consumo promedio y la conversin de la materia seca, no presentaron diferencias significativas entre tratamientos. Los pesos finales igualmente no difirieron, aunque por la diferencia de pesos observada debera esperarse que al menos el tratamiento III fuera significativamente mayor que el tratamiento II. Esto ltimo puede deberse al hecho de que el nmero de observaciones utilizado no fue lo suficientemente grande para que se manifestaran estadsticamente estas diferencias. Se concluy que al utilizar la norma de requerimiento nutricional que ms se asemeja a las condiciones climticas de Cuba segn Rostagno 2017, se disminuy el consumo de protena mediante la adicin de aminocidos sintticos (lisina y metionina) sin que este hecho afectara el comportamiento de los animales y mejor la conversin proteica.

English. There were used 21 females and castrated males YL x CC21 pigs, with an average live weight of 63 kg, distributed into three treatments according to a completely randomized design, with seven repetitions per treatment, in order to determine the productive performance of pigs fed different levels of protein and supplemented with lysine, methionine and coconut oil. The treatments were: Control (I), with 16% of crude protein (ordinary feeding), the second treatment (II) used a feeding with 13% of crude protein and included synthetic aminoacids, and the third treatment (III) supplied feeding with 13% of crude protein, with the addition of synthetic aminoacids and coconut oil.Initial weight, total gain, average daily gain, total consumption, average consumption and conversion of dry matter did not show significant differences amongst the three treatments. Final weights did not differ either, even though, by the observed difference in the weight, it should have been expected that at least Treatment III would be significantly higher than Treatment II. It could have been a result of not having conducted as many observations as needed in order to achieve the expected statistical differences. It was concluded that by using the regulation for nutritional requirements that suits the most the climatic conditions existing in Cuba according to Rostagno 2017, it was reduced the consumption of protein by adding synthetic aminoacids (lysine and methionine) without having affected the performance of the animals and improving the protein conversion.