Performance evaluation and adaptability of lactating dairy cows fed soybean and its by-products

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dc.creatorAngela Maria de Vasconcelos
dc.creatorMarcia Dias
dc.creatorVinicio Araújo Nascimento
dc.creatorDébora Andréa Evangelista Façanha
dc.date2014
dc.date.accessioned2026-07-07T03:59:48Z
dc.descriptionAiming to evaluate the lactation performance and adaptability of confined dairy cows fed diets containing soybean and its by-products, this study used 12 Holstein cows with initial production of 30 kg milk -1 day -1 in feedlot system distributed in a 4 x 4 Latin square design. The experimental period lasted 84 days. The dry matter intake (DMI) and meteorological variables were recorded daily. Milk production was measured from the 15 th to the 21 st day, with milk analysis twice in each period, and physiological variables collected on the 15, 17 th and 21 st days of each experimental period. The thermal comfort indices and rectal temperature were considered normal, however the respiratory frequency and heart rate were different between the periods. Total milk production and percentage of crude protein were not affected. The thermal environment had influence on the CMS and on the percentage of milk fat in warmer periods, but the mechanism of heat dissipation was efficient for the animals to maintain homeothermy without affecting milk production.
dc.formatapplication/pdf
dc.identifier1806-2636
dc.identifierhttps://www.redalyc.org/articulo.oa?id=303132001012
dc.identifier.urihttp://hdl.handle.net/123456789/450009
dc.languageen
dc.publisherUniversidade Estadual de Maringá
dc.relationhttp://www.redalyc.org/revista.oa?id=3031
dc.rightsActa Scientiarum. Animal Sciences
dc.sourceActa Scientiarum. Animal Sciences (Brasil) Num.4 Vol.36
dc.subjectAgrociencias
dc.titlePerformance evaluation and adaptability of lactating dairy cows fed soybean and its by-products
dc.typeartículo científico

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Acta Scientiarum. Animal Sciences - Universidade Estadual de Maringá