<b>Digestible and metabolizable energy of crude glycerin for finishing pigs

Hebert Silveira; Letícia Mendonça Rodrigues; Leticia Gomes de Morais Amaral; Luís Gustavo dos Santos Cerqueira; Renato Philomeno; Vinícius de Souza Cantarelli

doi:10.4025/actascianimsci.v37i1.24601

Hebert Silveira Universidade Federal de Lavras
Letícia Mendonça Rodrigues Universidade Federal de Lavras
Leticia Gomes de Morais Amaral Universidade Federal de Lavras
Luís Gustavo dos Santos Cerqueira Agroceres Multimix
Renato Philomeno Agroceres Multimix
Vinícius de Souza Cantarelli Universidade Federal de Lavras

DOI: https://doi.org/10.4025/actascianimsci.v37i1.24601

Resumo

The aim of this study was to determine the values of apparent digestible energy (DE) and metabolizable energy (ME) for crude glycerin derived of biodiesel based on pork fat for finishing pigs. The diets consisted of a basal diet and four levels of crude glycerin (0, 5, 10 and 15%). Twelve pigs were housed individually in metabolic cages and after seven days of adaptation, total collections of urine and feces for four consecutive days were performed. Gross energy (GE) of crude glycerin, diets, urine and fecal samples from each animal was determined. The crude glycerin used in this experiment presented 74.74% glycerin and 6,500 kcal kg^-1 gross energy. The values of digestible energy (DE) and metabolizable energy (ME) were estimated by difference in the DE, and content of the basal diet was subtracted from the test diets containing the ingredient. The amount of GE, DE and ME for finishing pigs was 6,500, 5,839 and 5,509 kcal kg^-1, respectively, with a coefficient of 91.0% of DE and 94.0% of ME. The energy of crude glycerin is based on the levels of fatty acids and GE depends on the concentration of fatty acids and glycerin, ME being a percentage of GE averaging is 84.75%.

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