Feeding amylolytic and fibrolytic exogenous enzymes in feedlot diets: effects on ruminal parameters, nitrogen balance and microbial diversity of Nellore cattle.

ABSTRACT:

Background

The environmental impact of feedlot operations is a growing concern, as cattle excrete a significant portion of feed nutrients as waste. Exogenous feed enzymes (EFE) have gained interest for their potential to enhance feed efficiency in ruminants by improving nutrient digestion. However, EFE effects on ruminal parameters have shown inconsistencies, with limited research on nitrogen metabolism and rumen microbiome impacts. Moreover, the synergistic effects of combining different EFEs remain unclear. This study aimed to evaluate the effects of individual and combined EFE products in feedlot diets on ruminal fermentation parameters, nitrogen metabolism, and ruminal microbial communities. Ten rumen-cannulated Nellore steers [543 ± 28.6 kg of body weight (BW)] were distribute

SUBMITTER: Ferreira IM 

PROVIDER: S-EPMC12232634 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature