Óleo bruto de Pterodon Emarginatus Vogel (sucupira) como manipulador da fermentação ruminal em sistema de cultura contínua de duplo fluxo
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2015-04-29
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Universidade Federal de Goiás
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The manipulation of ruminal fermentation is a valuable tool aiming at increasing productivity and efficiency by using resources for animal feed. There are different kinds of tools, such as homogeneous mixing of feed, appropriate trough management, correct feed formulation, and the use of compounds (additives) aimed at assisting rumen fermentation process. The use of antibiotics in foods for animals as growth promoters is facing a social barrier, because of the waste and bacterial resistance that these products can be generating. For that reason the use of antibiotics for this end or at the diet of ruminants has been banned from the EU since January 2006. Therefore, some technologies have been developed to replace these products, and the use of vegetable extracts in ruminants nutrition as ruminal fermentation modulators have been largely studied. Some plants are rich in active compounds with antimicrobial power that makes them useful for animal nutrition. The crude extract of Pterodon Emarginatus Vogel presents sesquiterpenes and diterpenes in its composition, and β-caryophyllene is the most representative compound. Due to the limitations of using unknown products in animal nutrition, the techniques of in vitro digestibility and metabolic studies with animals cannulated in the rumen are largely used at the first stages of research. The objective of this study was to evaluate different dosages of Pterodon Emarginatus Vogel crude extract in vitro ruminal fermentation through a system of continuous culture of double flow. The treatments corresponded to four doses: 0%; 0.6%, 0.12%; and 0.24% of Pterodon Emarginatus Vogel crude extract in dry matter (DM) of the provided diet and a treatment with Sodium Monensin (30 ppm). The experimental design was entirely in randomized blocks with four replications and five treatments. The in vitro test showed a difference of (P<0.05) in the DM and OM digestibility between the treatments 0.24% of Pterodon Emarginatus Vogel crude extract and monensin. There was no difference (P>0.05) in the digestibility of NDF and ADF. The addition of the Pterodon Emarginatus Vogel extract increased the digestibility of DM and OM when compared with Sodium Monensin without effects on NDF and ADF. The treatments affected (P<0.05) acetic acid concentration, and the concentration 0.24% showed a decrease when compared with control treatment. The same happened with the relation between acetic and propionic acids, where 0.24% treatment
produced a lower ratio compared with control and 0.06% treatments. The extract of Pterodon emarginatus Vogel has potential to modulate the ruminal fermentation because of its effect on ruminal microorganisms, and it is dose-dependent. Thus it can be used as an additive to manipulate ruminal fermentation and probably as a substitute of the sodic monensin. However, more studies must be carried out to answer the questions about the use of this substances, to clarify the effects of this products on the ruminal microorganisms, its effects on animal metabolism, parameters of in vivo ruminal fermentation, quantify the dosages to be used and quantify animal performance gain. The Culture System in Continuous Flow revealed to be an important alternative method and it showed accuracy for ruminal digestibility studies.
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NEVES NETO, J. T. Óleo bruto de Pterodon Emarginatus Vogel (sucupira) como manipulador da fermentação ruminal em sistema de cultura contínua de duplo fluxo. 2015. 47 f. Tese (Doutorado em Ciência Animal) - Universidade Federal de Goiás, Goiânia, 2015.