Suplementação de enzimas amilolíticas para ovinos recebendo silagem de grãos úmidos de milho: consumo, digestibilidade e balaço de nitrogênio

Abstract

The objective of this study was to evaluate the intake of dry matter and nutrients and total apparent digestibility according to the experimental diets of Santa Inês sheep, supplemented with amylolytic enzymes (alpha-amylase and glucanase), corn grain, hay and protein mixture. Six Santa Inês sheep were used. The animals were randomly divided into individual metabolic cages, using a 3x3 Latin square design repeated over time, considering 3 treatments and 3 experimental periods, where the response of the enzymes applied to wet grain silage will be evaluated. The experimental period was 16 days, 12 for the adaptation of the experimental diets and 4 for the data collection. Experimental diets were: 1- Condiment corn silage without addition of enzymes + hay + protein mixture; 2- Silage wet corn grains containing enzyme AMG + hay + protein mix and 3- Silage wet corn grains containing enzyme LYS + comminuted hay + protein mixture. Experimental diets were formulated containing a voluminous: concentrate ratio of 20:80. Amylolytic enzyme supplementation (AMG and LYS) influenced the dry matter intake (P <0.05) in relation to the CON treatment. The cellulolytic enzyme (AMG and LYS) increased (P <0.05) the digestibility of dry matter, organic matter, crude protein. The enzymatic treatments showed significantly higher results regarding dry matter, starch and protein consumption, as well as a higher digestibility of dry matter, starch and protein.