Bacterial direct-fed microbials fail to reduce methane emissions in primiparous lactating dairy cows

作     者：Jeyamalar Jeyanathan Cecile Martin Maguy Eugene Anne Ferlay Milka Popova Diego P.Morgavi 

作者机构：Universite Clermont AuvergneINRAVetAgro SupUMR 1213 HerbivoresF-63122 Saint-Genes-ChampanelleFrance Laboratory for Animal Nutrition and Animal Product QualityFaculty of Bioscience EngineeringGhent UniversityCoupure Links 6539000 GhentBelgium 

出 版 物：《Journal of Animal Science and Biotechnology》 (畜牧与生物技术杂志（英文版）)

年 卷 期：2019年第10卷第3期

页      面：802-810页

核心收录：

学科分类：09[农学] 

基　　金：Funding for the study was from Danone Research Palaiseau France.MP and DM acknowledge support from METHLAB a FACCE ERA-GAS project in collaboration with the French National Research Agency(ANR) 

主　　题：Bacterial direct-fed microbial Dairy cow Methane Milk fatty acid 

摘      要：Direct-fed microbials(DFM) are considered as a promising technique to improve animal productivity without affecting animal health or harming the *** potential of three bacterial DFM to reduce methane(CH4)emissions,modulate ruminal fermentation,milk production and composition of primiparous dairy cows was examined in this *** previous reports have shown that DFM respond differently to different diets,two contrasting diets were used in this *** lactating primiparous cows were randomly divided into two groups that were fed a corn silage-based,high-starch diet(HSD) or a grass silage-based,high-fiber diet(HFD).Cows in each dietary group were randomly assigned to four treatments in a 4 × 4 Latin square *** bacterial DFM used were selected for their proven CH4-reducing effect in *** included control(without DFM) and 3 DFM treatments: Propionibacterium freudenreichii 53-W(2.9 × 10^10 colony forming units(CFU)/cow per day),Lactobacillus pentosus D31(3.6 × 10^11 CFU/cow per day) and Lactobacillus bulgaricus D1(4.6 × 10^10 CFU/cow per day).Each experimental period included 4 weeks of treatment and 1 week of wash-out,with measures performed in the fourth week of the treatment *** CH4 emissions were measured during 3 consecutive days using respiration *** samples were collected for ruminal fermentation parameters and quantitative microbial *** samples were collected for composition *** weight of cows were recorded at the end of each treatment *** of diet,no mitigating effect of DFM was observed on CH4 emissions in dairy *** contrast,Propionibacterium increased CH4 intensity by 27%(g CH4/kg milk) in cows fed *** was no effect of DFM on other fermentation parameters and on bacterial,archaeal and protozoal ***,the effect of DFM on milk fatty acid composition was *** and *** DFM tended to increase body weight gain with ***