Feed intake and ruminal fermentation of proteins as a function of energetic and proteic food supplementation of steers

Revista Brasileira de Zootecnia

Pereira, José Carlos²  Mâncio, Antônio Bento²  Barbosa, Natália Guarino Souza²  Oliveira, Juliana Silva¹  Jham, Gulab Newandram²  Borges, Arnaldo Chaer²  Lana, Rogério de Paula² 

[1] UFV, Viçosa

关键词: ammonia;    deamination;    intake;    pH;    protein;    supplementation     Introdução Em dietas à base de forragens de baixa qualidade;    o consumo total de nutrientes geralmente aumenta pela adição de suplementos concentrados;    melhorando;    assim;    o desempenho dos animais;   

DOI  :  10.1590/S1516-35982001000600025

学科分类：兽医学

来源: Universidade Federal de Vicosa

【 摘 要 】

- The objective was to evaluate the effect of energetic supplementation on feed intake and ruminal fermentation of proteins in two protein levels in the diet (6 and 20%). There were used four rumen fistulated crossbred steers in a Latim square and the treatments were arranjed in a 2 ´ 2 factorial, in which the combinations were: A. only hay; B. hay + 2.8 kg of soybean meal; C. hay + 2.8 kg of corn meal; and D. hay + 2.8 kg of soybean meal + 2.8 kg of corn meal. Four experimental periods of 18 days were used, in which seven was for adaptation, seven for determination of dry matter intake and four for sampling. Ruminal samples were collected at 0, 2, 4 and 6 hours after feeding for determination of ammonia, pH and VFA. There was no interaction between corn meal and soybean meal, as well as no sampling time effect on the evaluated parameters. Soybean meal decreased 13% acetate:propionate (A:P) ratio and increased 41.2% DMI, with no effect on forage intake and pH and increased ammonia (790%), propionate (48%), total VFA (39%), isobutyrate (165%), isovalerate (208%) and valerate (201%). Corn meal did not affect protein fermentation, although it caused increase in DMI (35%) and decrease in ruminal pH (6%) and A:P ratio (18%).

【 授权许可】

CC BY-NC