Chewing activity of dairy cows fed diets based in sunflower cake

Elzânia Sales Pereira, Patrícia Guimarães Pimentel, Maria Socorro de Souza Carneiro, Ivone Yurika Mizubuti, Edson Luis de Azambuja Ribeiro, José Nery Rocha Junior, Marcus Roberto Góes Ferreira Costa

Abstract


The aim of this study was to evaluate the effect of different levels of sunflower cake (SC) on nutrient intake and ingestive behavior in lactating cows. Eight multiparous Holstein x Zebu cows, between 50 and 74 lactation days and 20 ± 2 kg of milk per day, were allocated in a 4 x 4 double latin square design, where the factors were four inclusion levels of SC (0; 7; 14 and 21%). Tifton 85 hay was used as forage in a 60:40 ratio of forage: concentrate. There was no detectable effect of the inclusion of SC (P > 0.05) on dry matter, crude protein and organic matter intake. However, ether extract and neutral detergent fiber (NDF) intake, showed linear and quadratic effect (P < 0.05), respectively. The time spent ruminating, idling and standing was not altered by addition of SC to the rations, but the time spent in food and water intake was linearly influenced (P < 0.05). Rumination efficiency, expressed in gDM/h and gNDF/h, the total chewing time, number of ruminal bolus and number of chews per day did not differ significantly, except for feeding efficiency that varied of quadratic way (P < 0.05). In a feeding management, if there is availability, it is recommended the use of sunflower cake up to 21% inclusion in the concentrate ration of dairy cows.


Keywords


Chewing; Feeding rate; Feeding time; Rumination time.



DOI: http://dx.doi.org/10.5433/1679-0359.2011v32n3p1201

Semina: Ciênc. Agrár.
Londrina - PR
E-ISSN 1679-0359
DOI: 10.5433/1679-0359
E-mail: semina.agrarias@uel.br
Este obra está licenciado com uma Licença Creative Commons Atribuição-NãoComercial 4.0 Internacional