Coproduto da indústria da vitivinificação na dieta de ovinos como estratégia para mitigação do metano entérico

Abstract

Finding ways to target agricultural and rural development to meet economic, social and environmental demands requires medium and long-term structural changes, especially within the current agricultural context. Data from the Food and Agriculture Organization of the United Nations (FAO) indicate that ruminants are the main sources of methane emissions, and it is essential searching for strategies that minimize this effect. The objective of this work was to evaluate performance, methane emissions and ruminal flora modulation in sheep feed by wine industry byproduct. The study was conducted over a period of 20 days using eight female sheep crosses Texel and Corriedale with initial body weight of 33 ± 2.8 kg, allocated randomly in individual pens. The animals were divided into two groups: control (CON), represented by animals fed only basal diet, and group grapes (GU), represented by animals fed with grape marc in the basal diet. GU sheep had better feed conversion in relation to CON and lower methane emission (p> 0.05). There was a reduction of VFA concentrations in both treatments, with a reduction of the proprionate in the GU in relation to the control (p <0.05). It was possible to observe a decrease in the number of ruminal protozoa. The inclusion of grape marc in the base diet was efficient to reduce methane emissions by 14%. The grape marc may alter the dynamics of ruminal fermentation and the profile of protozoa to benefit animal performance. However, its action on ruminal defaunation and its interaction with VFA should be further studied in order to prove its selectivity.