Avaliação in vitro de diferentes aditivos sobre a emissão de metano, a degradabilidade da matéria seca, a produção de gases, e as concentrações de amônia e ácidos graxos voláteis

• Autor(a) principal: Garcia, Liéber de Freitas
• Data de Publicação: 2013
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/5970
• topic: Metano; Gases; Aditivos; Methane; Gases; Additives; CNPQ::CIENCIAS AGRARIAS::ZOOTECNIA::NUTRICAO E ALIMENTACAO ANIMAL

Methane is a major greenhouse gas. The issue has intensified in recent years, becoming one of the objects in the study of nutritionists, since its production is also given by fermentation ruminal. The objective of this research was to evaluate in vitro the effect of organic and inorganic additives (monensin, monensin + Fator P, Fator P, Fator P dose doubled, tripled dose Fator P, AGE, yeasts and algae meal) to mitigate CH4 and also evaluate the effect of these additives on ruminal concentrations of ammonia nitrogen and volatile fatty acids and on the degradability of dry matter and organic matter Tifton hay 85. The dosages of additives studied were 20 mg monensin/kg DM, 20 mg monensin/kg DM + 300 mg of Fator P ®/kg DM, 300 mg of Fator P ®/kg DM, 600 mg of Fator P ®/kg DM and 900 mg of Factor P ®/kg DM, 100 mg essential oil/kg DM, 500 mg yeast/kg DM and 5 g of algae meal/kg DM and Caulin as control treatment. Measurements of gas productions were performed at times 4, 8, 12, 18, 24, 30, 36, 48, 72 and 96 hours after in vitro incubation, and at times of 4, 8, 12, 18 and 24 hours also were collected for the measurement of methane production gases. Were also measured concentrations of ammonia nitrogen (NH3-N), acetic, propionic and butyric and total volatile fatty acids (VFA) at 24 and 96 hours after incubation. The use of monensin, Fator P dose duplicate and yeast reduced (P <0.05) methane production. There was no difference (P> 0.05) in the production of VFA and NH3-N at 24 and 96 hours after incubation. The in vitro degradation of dry matter was increased by every additives at 96 hours of incubation. Was concluded that monensin, Factor P dose doubled and yeasts are effective to reduce methane production in vitro.