Effect of the propolis on amino acids deamination and ruminal fermentation

Revista Brasileira de Zootecnia

Eifert, Eduardo da Costa¹  Queiroz, Augusto Cesar de²  Nunes, Poliana Mary Magalhães¹  Pacheco, Cristiana Gama³  Stradiotti Júnior, Deolindo¹  Lana, Rogério de Paula² 

[1] UFV;Universidade Federal de Viçosa, Viçosa;Instituto de Ensino Superior do Espírito Santo

关键词: ammonia;    pH;    protein;    ruminal fermentation;    VFA    Introdução Nas últimas três décadas;    a pecuária bovina brasileira tem sofrido um estreitamento na relação benefício/custo;    em parte;    resultado da competitividade de outros mercados;   

DOI  :  10.1590/S1516-35982004000400029

学科分类：兽医学

来源: Universidade Federal de Vicosa

【 摘 要 】

The objective of this work was to determine the in vitro effect of the propolis on the specific activity of ammonia production (SAAP) or activity deamination of amino acids and on ruminal fermentation in bovine. The SAAP was determined using ruminal fluid and McDougall buffer (1:4) with different levels of propolis extract and excess of hydrolyzed casein. In the study of the in vitro effect of the propolis on the ruminal fermentation and SAAP, four Holstein steers were used, in two experimental periods, fed a 35.0% concentrate diet and submitted to the control and propolis extract treatments. The propolis extract obtained with ethanol at 70% in water was in vitro more efficient than that obtained with ethanol at 99.5% in water. Values up to 78% of SAAP inhibition in relation to the control were obtained. The propolis extract did not affect dry matter intake, ruminal pH, ammonia and microbial protein concentrations. There were no differences for molar proportions of the volatile fat acid (VFA), acetic, propionic and butyric in the rumen fluid. However, the propolis extract increased the total VFA concentration as well as inhibited SAAP by the ruminal microorganisms, demonstrating that, in spite of not having reduced the ruminal ammonia level, it seems to exist potential of this effect to happen in other situations, as in diets with high rate of degradable protein/fermentable carbohydrate, observed in new grass pastures or grass pastures consociated with legumes.

【 授权许可】

CC BY-NC