Cinética ruminal in vitro da silagem de azevém com níveis de coproduto de viticultura

Abstract

The use of viticulture by-product in feedcan become a sustainable animal production alternative, aiming to reduce costs, being a food alternative for periods of forage scarcity in certain regions, besides avoiding the incorrect disposal of the residue generated by viticulture, which would have a negative environmental impact. The objective of this work was to estimate the parameters related to in vitroruminal degradation kinetics of ryegrass (Lolium multiflorum, LAM.) Silages harvested in both vegetative and reproductive stageswere used, in order to define the best level of inclusion of viticulture by-products in silages.The by-product inclusion in silage were0%, 10%,20% and 30% based on dry matter as a supplement. The work was carried at the Laboratório de Análise de Alimentos from Universidade Tecnológica Federal do Paraná, Dois Vizinhos campus. For this, samples were weighed into ambar bottles and gas volume and pressure were measured at times 1, 2, 3, 6, 8, 10, 12, 16, 20, 24, 30, 36, 48, 72, 96, 120 and 144 hours after the material was incubated, to estimate the ruminal in vitro degradation as the parameters of ruminal kinetics. Amathematical model was applied toestimate each parameter. Effect of hours, treatment, mean and error were verified.In vitroruminal kinetics parameters were characterized as latency time and degradation rate in order to establish a favorable co-product level for animal feed.