Studio dei fabbisogni di energia e lisina SID nel suino pesante alimentato ad libitum

This study aims to assess the energy and SID lysine requirements of a pig population (Goland-C21xCamborough-43) suitable for dry-cured ham production. In this experiment, 96 barrows and gilts were fed ad libitum from approximately 40 to 200kg body weight. The pigs were divided into 8 groups and each group was assigned one of four feeding treatments (2 groups per treatment). The four treatments were classified as low (L), medium-low (ML), medium-high (MH), and high (H), with increasing levels of dietary lysine. For the experiment we used 7 different feed formulations, with SID lysine content ranging from 4.6 to 10.4 g/Kg DM, achieved by progressively increasing the soybean meal content and reducing the barley grain. Pigs in each treatment group received diets with progressively decreasing SID lysine levels as they aged, distributed over three feeding phases: growing (90-118 days), early finishing (119-146 days), and late finishing (147-233 days). Body weight, feed intake and backfat were monitored during the trial, and were used with other data from chemical analysis and tabular references to calculate metabolizable energy and SID lysine partitioning and requirements. The results showed no statistically significant differences between ML and MH, H treatments in terms of growth performance and ME partitioning, while significant differences were found between ML and L treatments. However, the ML group was the most efficient regarding SID lysine partitioning compared to MH e H treatments. This suggest that the ML treatment is the most profitable for the Goland-C21xCamborough-43 pig population.