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Navegando Mestrado em Zootecnia (EVZ) por Assunto "Ácidos graxos de cadeia curta"
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Item Aditivos fitogênicos e ionóforos na degradabilidade da fibra e parâmetro metabólicos em bovinos(Universidade Federal de Goiás, 2016-03-01) Almeida, Jean Sardinha de; Ferreira, Reginaldo Nassar; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4787019Y5; Padua, João Teodoro; http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4721189P8; Pádua, João Teodoro; Taveira, Rodrigo Zaiden; Miyagi, Eliane SayuriThe objective this paper was evaluate the inlcusion of crude extract of Croton urucurana Baillon or composed of essential oil of cashew and castorbean oil or monensin on the degradability of dry matter and fiber in vitro and dry matter in situ and fermentation ruminal metabolic parameters in beef cattle. The experiment was conducted in the Institute of Biological Sciences (ICB) and the School of Veterinary and Animal Science of the Federal University of Goiás – GO, from August 2015 until January 2016. There were four treatments through in vitro technique: control, monensin, Croton urucurana Baillon, biophytus (functional oil composed of cashew and castorbean), with five repetitions. Were evaluated the parameters of degradability of dry matter. Metabolic analysis and in situ was through four animals distributed in a Latin square, were measured glucose, urea, urea nitrogen in the blood, aspartate aminotransferase, alkaline phosphatase, gamma glutamyl transpeptidase, albumin, total bilirubin and factions, creatinine, Total cholesterol, HDL, LDL, VLDL, triglyceride and lactate dehydrogenase. Ruminal parameters were determined by protozoa count, ammonia nitrogen, pH, short chain fatty acids, bacterial reductive activity. The experimental design was completely at random. The data were submitted to analysis of variance and compared by Tukey test at 5% probability. The treatments did not increase the IVDMD (P> 0.05). There was no significant effect (P> 0.05) of the treatments on in vitro degradation parameters of DM and NDF in all evaluated times. For MS degradability in situ parameters, there was a significant effect (P <0.05) between treatments for soluble and effective degradation fraction with 2% by pass rate. The DM intake, had significant difference (P <0.05) between treatments, with lower consumption for monensin with admission was independent of diet type, either directly via the rumen cannula, it can be show that the lower consumption of diet with monensin supplementation is not by means of sensory but physiological and metabolic mechanisms. There was no significant effect (P> 0.05) for pH between treatments, but the collections after feeding was significant (P <0.05) monensin treatment, occurring up before feeding up two hours. Acetic acid levels were significant (P <0.05) for the hours of collection. The levels of butyric acid was affected by treatments (P <0.05) and not the hours of collection (P> 0.05). The concentrations of AST, GGT, LDH FA and was not affected by treatments (P> 0.05). The inclusion of essential oils, Croton urucurana Baillon and monensin in beef cattle diets hay base has not improved the evaluated parameters. The effective degradability of dry matter had better results with the inclusion of functional oils composed cashews and castorbeans. The intake was influenced by monensin and functional oil in addition the fuction of the two are similar, can be used one over the other.Item Nitrato encapsulado na suplementação para novilhos de corte em pastejo(Universidade Federal de Goiás, 2020-10-02) Berti, Guilherme Felipe; Silva, Maurícia Brandão da; http://lattes.cnpq.br/9608210292530980; Fernandes, Juliano José Resende; http://lattes.cnpq.br/7949776443064259; Couto, Victor Rezende Moreira; http://lattes.cnpq.br/4329309889502866; Couto, Victor Rezende Moreira; Barbosa, Analívia Martins; Araújo, Rafael Canonenco deThe present work evaluated the effects of the partial replacement of soybean meal with encapsulated nitrate in suplemented grazing beef cattle diets. The experimental design was a cross-over, conducted in two consecutive periods of 21 days each. Eight crossbred steers (average body of 345 kg), castrated, fitted with ruminal cannula were distributed in two treatments: Control - multiple supplement based on soybean meal, without nitrate; and NE - supplement with encapsulated nitrate (5% on the concentrate dry matter), replacing soybean meal. Each animal were daily supplemented with 1.0% of his body weight. The data were analyzed using mixed models, using the MIXED procedure of the SAS program and comparisons between treatments were made using the F test, at the level of 5% probability. The total dry matter intake (DMI) was not affected (P = 0.459), as well as the forage DMI (P = 0.906). However, a decreae of the concentrate DMI rate (% body weight) was observed (from 0.92% to 0.88%) (P = 0.024). Control and EN animals showed higher concentrate intake during three hours after feed, however EN had lower and slower consumption throughout the day. The use of EN did not change the digestibility of the dry matter (P = 0.090), as well as the digestibility of the crude protein (P = 0.160), neutral detergent fiber (P = 0.122) and non-fibrous carbohydrate (P = 0.872), but decreased the ether extract digestibility from 68.81% to 61.21% (P <0.05). The EN decreased butyrate (P <0.01) and valerate rates (P <0.0095) 9 hours after feeding. There was no effect of EN on propionate (P> 0.1215) and total AGCC rates (P> 0.8620), whereas EN increased the total acetate rates 3, 6 and 12 hours after supplementation (P <0.0018). There was no effect of EN on the ruminal NH3 concentration (P> 0.5845). In summary, EN provides lower palatability to concentrate diets, maybe increasing the time spent in the trough throughout a day, but did not decreases the dry matter intake of suplemented grazing cattles.