Glicerina e óleos funcionais em dietas de bovinos em confinamento sobre o desempenho e comportamento animal

• Autor(a) principal: Silva, Lorrayny Galoro da
• Data de Publicação: 2013
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Estadual de Maringá (RI-UEM)
• dARK ID: ark:/35916/00130000039qv
• Texto Completo: http://repositorio.uem.br:8080/jspui/handle/1/1755
• topic: Bovinos; Dieta; Glicerina; Confinamento; Digestibilidade; Desempenho; Comportamento ingestivo; Extratos vegetais; Aditivos; Biodíesel; Etologia; Brasil.; Cattle; Diet; Glycerine; Confinement; Digestibility; Performance; Feeding behavior; Plant extracts; Additives; Biodiesel; Ethology; Brazil.; Ciências Agrárias; Zootecnia

This work was carried out to evaluate the partial replacement of corn (15% of drymatter in the total diet) for the co-product of biodiesel processing (glycerin) and the addition of cashew and castor functional oils on animal performance, feed intake, total apparent digestibility and ingestive behavior of Nellore bulls in feedlot. Thirty bulls with 24 ± 2 months old and 400 ± 34 kg live weight were used. The experiment lasted63 days, and was divided into three periods of 21 days. The bulls were distributed in completely randomized design with 10 animals per treatment kept in pens of 200 m2 of useful area. The experimental diets were: Control - CON; Glycerin - GLY and Glycerin+ functional oils - GFO. The partial substitution of corn for glycerin and the addition of functional oils to the diets did not affect animal performance, feed conversion of dry matter intake and food intake except for ether extract which was higher for the animals fed the control diet. There was no difference among the purified, isolated and enriched lignin (LIPE®) markers, indigestible dry matter (iDM) and indigestible neutral detergent fiber (iNDF) in relation to apparent digestibility of dry matter and other nutrients. The partial substitution of corn for glycerin did not affect the total apparent digestibility of crude protein and ether extract, however it generated an increase in the apparent digestibility of dry matter, organic matter and total digestible nutrients and a reduction in the digestibility of fibrous and non-fiber components of the diets. The scales of observation did not influence the determination of the time spent eating, ruminating and idling and the total number of chews, however the number of periods and the time period for such activities differed among the scales. There was no difference among the number of observation shifts. The addition of glycerin to diets caused a decrease in the ruminating time and an increase in the idling time of the animals. The number of feeding period and idle differed among diets, being higher for the animals fed with diets with partial replacement of corn by glycerin, on the other hand the inclusion of glycerin in the diet reduced the feeding period and idle time of bulls. The inclusion of glycerin and functional oils to the diets generated a similar response to animals in the control diet for the number of ruminated bolus per day, number of chews per day and total chewing time of bulls, being superior to the animals fed with diets containing glycerin and functional oils.