Produção Nacional
Ingestive Behavior of Heifers Supplemented with Glycerin in Substitution of Corn on <i>Brachiaria brizantha</i> Pasture
2014; Asian-Australasian Association of Animal Production Societies; Volume: 27; Issue: 11 Linguagem: Inglês
10.5713/ajas.2014.14233
ISSN1976-5517
AutoresLívia Maria Araújo Macedo Facuri, Robério Rodrigues Silva, Fabiano Ferreira da Silva, Gleidson Giordano Pinto de Carvalho, Cláudia Batista Sampaio, Fabrício Bacelar Lima Mendes, M.M. Lisboa, Daniele Soares Barroso, Venício Macêdo Carvalho, Maria Magna Silva Pereira,
Tópico(s)Soil Management and Crop Yield
ResumoThe objective was to evaluate the ingestive behavior of crossbred heifers finished on a Brachiaria brizantha cv. Marandu pasture receiving four levels of glycerin in their supplementation. Thirty-six crossbred heifers with average initial weight of 264.83±3.83 kg and 20 months of age were distributed into a completely randomized design with four treatments and nine replications: control (0%), 4.82%, 10.12%, and 15.56% glycerin in the dry matter. The grazing time reduced linearly (p<0.05), whereas the time spent on activities like rumination, idleness, trough and total chewing time were quadratically affected (p<0.05). Bite rate and number of bites/day were quadratically influenced (p<0.05). The number of bites/swallowed cud and the number of bites/minute, however, increased linearly (p 0.05). The number of rumination periods reduced linearly (p<0.05), whereas the number of grazing, idle and trough periods, and the times per grazing, idle, rumination and trough periods were quadratically affected (p 0.05) whereas the feed efficiency of neutral detergent fiber reduced linearly (p<0.05). Addition of glycerin in substitution of corn in supplements for animals managed on pastures does not influenced feed intake, but reduces the grazing time and increases the idle time. The supplementation also improves feed and rumination efficiencies.
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