Protein (raw or rosted soybeans) and energy (coursely ground or steamflaked corn) sources with varying ruminal degradabilities for lactating cows - DOI: 10.4025/actascianimsci.v29i2.238 / Fontes protéicas e energéticas com diferentes degradabilidades ruminais para vacas em lactação - DOI: 10.4025/actascianimsci.v29i2.238
de Castilho Barnabé, Éberson; Augusto Portela Santos, Flávio; Maris Machado Bittar, Carla; Vaz Pires, Alexandre; Imaizumi, Hugo; de Oliveira Juchem, Sérgio.
Acta sci., Anim. sci
; 29(2): 209-216, 2007.
Artículo
en Portugués
|
LILACS-Express
| ID: biblio-1459062
The objective of this trial was the evaluation of ruminal degradation synchrony of protein and energy sources. Four Holstein cows (23 kg day-1) were used in a 4 x 4 Latin Square design and 2 x 2 factorial arrangement two protein (raw vs. roasted soybeans) with two energy sources (coarsely ground vs. steam-flaked corn). Dry matter intake was higher for cows fed coarsely ground corn with roasted soybean (p 0.11). Flaking of corn tended (p = 0.12) to increase milk yield and to decrease milk fat content. Roasted soybean did not improve lactational performance of mid lactating cows (p > 0.05). Rumen pH was not affected by treatments (p > 0.05). Both roasted soybeans and flaking of corn decreased rumen ammonia nitrogen (p 0.01). Animal fed steamflaked corn tended showed higher total VFA molar concentrations (p = 0.10), but there were no treatments effect on ruminal pH. A higher (p = 0.06) ruminal starch digestibility was observed for raw soybean treatment.
Biblioteca responsable:
BR68.1
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