Methane emissions and estimates of ruminal fermentation parameters in beef cattle fed different dietary concentrate levels

Revista Brasileira de Zootecnia

Lima, Magda Aparecida de¹  Pedreira, Márcio dos Santos²  Oliveira, Simone Gisele de³  Frighetto, Rosa Toyoko Shiraishi¹  Primavesi, Odo¹  Berchielli, Telma Teresinha⁴ 

[1] EMBRAPA;Universidade Estadual do Sudoete da Bahia;Universidade Federal do Paraná;Unesp

关键词: global greenhouse gases;    nutritional value;    rumen fermentation;    SF6    Introduction Measurements of ruminal methane emissions are of great importance since they allow for the quantification of two important aspects: greenhouse gas emissions and ingested energy losses by ruminants (Animut et al;   

DOI  :  10.1590/S1516-35982013000800009

学科分类：兽医学

来源: Universidade Federal de Vicosa

【 摘 要 】

Using sorghum silage, the effect of roughage/concentrate ratios was evaluated on nutrient intake, digestibility, ruminal parameters and methane production by beef cattle. Three treatments (0, 30 and 60% of concentrate in DM of the diet) were distributed in three Latin squares, with nine animals and three periods. Dry matter intake increased as the grain concentration in diet increased; pH showed opposite behavior. Methane emissions were lower for animals fed the diet exclusively with sorghum silage as compared with those fed 30% of concentrate, but was similar to that of animals receiving 60% of concentrate. Losses of ingested gross energy as methane were reduced by 33% when grain concentration was increased in the diet. Concentrations of propionic and butyric acids were greater in diets with grain concentrate; acetic acid concentration was not affected. Concentrate in diet increases available energy for the metabolism, measured by lower losses of ingested gross energy as ruminal methane.

【 授权许可】

CC BY-NC