SILVA, L. S.; SILVA, Lívia Soares.
Résumé:
This study aimed to evaluate the effect of glycerin instead to usual fodder sources in the
diet of ruminants. Through the parameters of gas production with rumen degradability,
pH value, the total gas production, production of volatile fatty acids, ammonia nitrogen
content of four forage species on the effect of substitution with the byproduct of
biodiesel, glycerin, through the use of semi- automated technique of gas production in
vitro is using a statistical design with 4 treatments and 4 replicates. The treatments were
the replacement of glycerin by increasing levels 0%, 30% 50% and 70% of the forage:
Elephant Grass, cane sugar, corn silage and Brachiaria grass. Within the levels of
glycerin, the higher the higher its replacement was dry matter degradability. The meaus
of the total gas production for the sugar cane and elephant grass fluctuated between
levels, which showed higher values for the 50% level. The methane mitigation this study
the effect of glycerin Brachiaria provided with a positive effect to the environment. The
Brachiaria and Elephant grass played for the variables of production of methane, carbon
dioxide and ammonia nitrogen a positive effect on the quality of the forage with
glycerin. The production of acetate, with the addition of glycerin values decreased, with
the exception of Elephant grass, which increased their percentage to the level of 50%.
Increasing amounts of butyric and propionic acid can occur when the diet is rich in
cereals. Glycerin can be recommended to 30%, based on dry matter of Elephant and
Brachiaria grass and played, respectively, great use of the effect of glycerin. And the
elephant grass has had a positive effect on forage quality with glycerin, for the
production of volatile fatty acids.
