Intake and digestibility in cattle grazing temperate grass associated with legume and/or energetic supplementation

Cassiano Albino Lorensetti, Magali Floriano da Silveira, Roberta Farenzena, Eduardo Felipe Colerauz de Oliveira Lazzarotto, Jeferson Menezes Lourenço, Andressa Alaine Michailoff, Lucas Felipe Francisco and Ana Carolini Barbosa Sordi
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Cassiano Albino Lorensetti: Universidade Tecnológica Federal Do Paraná, Câmpus Dois Vizinhos, Dois Vizinhos, Brazil
Magali Floriano da Silveira: Universidade Tecnológica Federal Do Paraná, Câmpus Dois Vizinhos, Dois Vizinhos, Brazil
Roberta Farenzena: Universidade Tecnológica Federal Do Paraná, Câmpus Dois Vizinhos, Dois Vizinhos, Brazil
Eduardo Felipe Colerauz de Oliveira Lazzarotto: Universidade Tecnológica Federal Do Paraná, Câmpus Dois Vizinhos, Dois Vizinhos, Brazil
Jeferson Menezes Lourenço: University of Georgia, Athens, GA, USA
Andressa Alaine Michailoff: Universidade Tecnológica Federal Do Paraná, Câmpus Dois Vizinhos, Dois Vizinhos, Brazil
Lucas Felipe Francisco: Universidade Tecnológica Federal Do Paraná, Câmpus Dois Vizinhos, Dois Vizinhos, Brazil
Ana Carolini Barbosa Sordi: Universidade Tecnológica Federal Do Paraná, Câmpus Dois Vizinhos, Dois Vizinhos, Brazil

Czech Journal of Animal Science, 2021, vol. 66, issue 9, 349-358

Abstract: The intercrop between grasses and legumes is an alternative to maintain and increase animal production. The study was conducted to evaluate the effect of grass-legume mixtures with or without supplementations on rumen fermentation, nutrient intake, and microbial protein synthesis. Six Holstein steers fitted with ruminal cannula were kept in a double 3 × 3 Latin square design. The treatments were: 1) oat, annual ryegrass, and supplement (GS), 2) oat, annual ryegrass, and vetch (GL), 3) oat, annual ryegrass, vetch, and supplement (GLS). Supplementation of ground maize was given daily at 11 h at 1% of body weight. Total digestible nutrient intake was higher in steers fed GS and GLS. Animals on GL ingested higher concentrations of nitrogen (N) compared to animals on GS and GLS diets. Ruminal pH and ammonia concentration were higher in GL. Grass-legume mixtures and supplements showed higher concentrations of sugar, α-amino acids, and peptides. The ruminal fermentative parameters, ruminal pH, ammonia, and sugars ranged cubically across the day. Microbial protein synthesis was similar amongst the treatments. Animals exclusively consuming temperate grass produce higher ruminal pH and ammonia concentrations. Therefore, using temperate legumes in pasture systems can be included in the cattle diet in lieu of utilizing energy supplements.

Keywords: ammonia concentration; Avena strigosa; dry matter intake; nitrogen balance; microbial protein synthesis; Vicia sativa (search for similar items in EconPapers)
Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlcjs:v:66:y:2021:i:9:id:38-2021-cjas

DOI: 10.17221/38/2021-CJAS

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