Níveis de lisina para leitões na fase de creche alimentados com dietas contendo quirera de arroz

An experiment was made for evaluating the effect of lysine levels on the performance of piglets fed on pre-starter diets containing rice broken and different lysine levels. Eighty, 21-day-old mestizo pigs weighing 6.17 ± 1.02 kg were used; they were distributed using a randomised complete block experimental design, involving four treatments, five repetitions and four piglets per experimental unit. The trial was divided into two periods (I pre-initial and II initial), each lasting 21 days. The diets were supplemented with increasing levels of synthetic lysine for each period, resulting in treatments having 1.10%, 1.25%, 1.40% and 1.55% digestible lysine for the first pre-starter phase (6.0-13.0 kg) and 0.77%, 0.92%, 1.07% and 1.22% for the second one (13.0-28.0 kg). Digestible lysine levels for the pre-initial pre-starter period had no effect (p>0.05) on feed and energy consumption, or feed conversion ratio (FCR); lysine levels increased linearly (p0.05) dos níveis de lisina digestível sobre o consumo de ração e energia nem sobre a conversão alimentar; os níveis de lisina aumentaram de forma linear (P 0.05) de los niveles de lisina digestible sobre el consumo de alimento y de energía, ni sobre la conversión alimenticia; los niveles de lisina aumentaron linealmente (P <0.05) el consumo diario lisina digestible y en forma cuadrática la ganancia de peso. En el segundo período de preceba, hubo efecto lineal sobre el consumo de alimento, de lisina, de energía y la conversión alimenticia y efecto cuadrático sobre la ganancia diaria promedio. En conclusión, los niveles de lisina digestible para la máxima ganancia de peso se estimaron en 1.355 y 0.972% para cerdos en fase pre inicial e inicial de preceba y con peso de 6.0 a 13.0 y de 13.0 a 28.0 kg, respectivamente