Resumo

HURTADO-NERY, Víctor L  e  SOARES, Rita TRN. Lysine levels in piglet pre-starter diets containing broken rice. Orinoquia [online]. 2014, vol.18, n.1, pp.53-59. ISSN 0121-3709.

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 (p<0.05) regarding daily digestible lysine consumption and quadratically for weight gain. There was a linear effect on the consumption of feed, lysine, energy and FCR during the second pre-starter period and a quadratic effect on average daily weight gain. Digestible lysine levels for maximum weight gain were thus estimated as being 1.355% for piglets weighing 6.0 to 13.0 kg during pre-initial pre-starter phase and 0.972% for piglets during initial pre-starter phase weighing 13.0 to 28.0 kg.

Palavras-chave : Alternative feed; performance; nutritional requirement; piglet.

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