Influence of disodium fumarate on methane production and microbial activity in Rusitec fermenters fed a mixed diet
The objective of this study was to investigate the effects of disodium fumarate (FUM; 3.75 mmol/d) on the fermentation of a 60:40 grass hay:concentrate substrate in Rusitec fermenters. Each of eight fermenters received daily 20 g of substrate dry matter (DM). FUM treatment tended to increase (P=0.076) substrate DM disappearance after 6 h of incubation (39.8 vs 42.2％), but no effects were detected after 48 h (P=0.830). Daily production of acetate, propionate and total volatile fatty acids (VFA) was increased by 11,23 and 11％, respectively, in FUM fermenters, but methane production was not affected (P=0.167). FUM treatment decreased (P＜0.001) the acetate:propionate (2.92 vs 2.62) and methane: VFA (0.248 vs 0.208) ratios and increased the daily flow of microbial N (P=0.007; 140 vs 149 mg/d). In contrast, FUM did not affect (P=0.260 to 0.960) either the numbers of total and cellulolytic bacteria or the fibrolytic activity of ruminal fluid.
disodium fumarate methane microbial activity rumen Rusitec
M.L.Tejido M.J.Ranilla L.A.Giraldo M.D.Cairo
Department of Animal Production, University of Leon 24071 Leon, Spain
国际会议
The 7tb International Symposium on the Nutrition of Herbivores(ISNH-7)(第七届国际草食动物营养研讨会)
北京
英文
1109-1114
2007-09-16（万方平台首次上网日期，不代表论文的发表时间）