scholarly journals Interrelations between the rumen microbiota and production, behavioral, rumen fermentation, metabolic, and immunological attributes of dairy cows

2018 ◽  
Vol 101 (5) ◽  
pp. 4615-4637 ◽  
Author(s):  
M. Schären ◽  
J. Frahm ◽  
S. Kersten ◽  
U. Meyer ◽  
J. Hummel ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Rumen Fermentation ◽  
Rumen Microbiota

Effect of dietary forage sources on rumen microbiota, rumen fermentation and biogenic amines in dairy cows

2013 ◽  
Vol 94 (9) ◽  
pp. 1886-1895 ◽  
Author(s):  
Ruiyang Zhang ◽  
Weiyun Zhu ◽  
Wen Zhu ◽  
Jianxin Liu ◽  
Shengyong Mao
Keyword(s):  
Dairy Cows ◽  
Biogenic Amines ◽  
Rumen Fermentation ◽  
Rumen Microbiota

Influence of dietary docosahexaenoic acid supplementation on the overall rumen microbiota of dairy cows and linkages with production parameters

2014 ◽  
Vol 60 (5) ◽  
pp. 267-275 ◽  
Author(s):  
Valeria A. Torok ◽  
Nigel J. Percy ◽  
Peter J. Moate ◽  
Kathy Ophel-Keller
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Docosahexaenoic Acid ◽  
Dairy Cows ◽  
Bacterial Communities ◽  
Ciliate Protozoan ◽  
Rumen Microbiota ◽  
Production Parameters ◽  
Enteric Methane ◽  
Archaeal Communities

The rumen microbiota contributes to greenhouse gas emissions and has an impact on feed efficiency and ruminant product fatty acid composition. Dietary fat supplements have shown promise in reducing enteric methane production and in altering the fatty acid profiles of ruminant-derived products, yet in vivo studies on how these impact the rumen microbiota are limited. In this study, we investigated the rumen bacterial, archaeal, fungal, and ciliate protozoan communities of dairy cows fed diets supplemented with 4 levels of docosahexaenoic acid (DHA) (0, 25, 50, and 75 g·cow−1·day−1) and established linkages between microbial communities and production parameters. Supplementation with DHA significantly (P < 0.05) altered rumen bacterial and archaeal, including methanogenic archaeal, communities but had no significant (P > 0.05) effects on rumen fungal or ciliate protozoan communities. Rumen bacterial communities of cows receiving no DHA were correlated with increased saturated fatty acids (C18:0 and C11:0) in their milk. Furthermore, rumen bacterial communities of cows receiving a diet supplemented with 50 g DHA·cow−1·day−1 were correlated with increases in monounsaturated fatty acids (C20:1n-9) and polyunsaturated fatty acids (C22:5n-3; C22:6n-3; C18:2 cis-9, trans-11; C22:3n-6; and C18:2n-6 trans) in their milk. The significant diet-associated changes in rumen archaeal communities observed did not result in altered enteric methane outputs in these cows.

Rumen Microbiota Alterations During Ketosis is Associated with the Development of Mastitis in Dairy Cows

2021 ◽  
Author(s):  
Kaihe Xiang ◽  
Xiaoyu Hu ◽  
Ruiying Mu ◽  
Shuang Li ◽  
Ying Wang ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Rumen Fluid ◽  
Animal Husbandry ◽  
16S Rrna Gene Sequencing ◽  
Rrna Gene ◽  
Rumen Microbiota ◽  
Metabolism Disorder ◽  
Clinical Investigations ◽  
Rrna Gene Sequencing ◽  
Serious Disease

Abstract Backgroud: Mastitis is the most serious disease endangering animal husbandry, especially dairy farming. Clinical investigations indicated that cows suffering from ketosis have a higher probability of mastitis. Rumen microbiota is closely related to ruminant health. However, it is not clear what role it plays in this process.Results: The microbiota in rumen fluid and milk from ketosis cows were determined by 16S rRNA gene sequencing. The results showed that the richness of bacterial community both in rumen and milk were changed in ketosis cows. The abundance of genus Prevotella, Ruminococcus, Succinivibrionaceae_UCG-001 and Streptococcus in rumen fluid from ketosis cows decreased significantly and were negatively correlated with blood BHBA and milk SCC. In contrast, the abundance of genus Luteimonas, Thermomonas, Christensenellaceae_R-7_group, Rikenellaceae_RC9_gut_group, NK4A214_group, Paracoccus, Acetitomaculum, Prevotellaceae_UCG-003, Deinococcus, Saccharofermentans and Butyrivibrio in rumen fluid from ketosis cows increased significantly and were positively correlated with blood BHBA and milk SCC. In addition, the abundance of F082 and Thermomonas were increased, while the abundance of genus Acinetobacter and UCG-005 were reduced both in milk and rumen fluid in ketosis cows than healthy cows. Conclusions: Ketosis in dairy cows is capable of inducing mastitis. The rumen microbiota of ketotic cows changed significantly and is associated with the development of mastitis. Targeting rumen microbiota regulation may be a promising strategy to prevent metabolism disorder and its secondary diseases in dairy cows.

Effect of pine-based biochars with differing physiochemical properties on methane production, ruminal fermentation, and rumen microbiota in an artificial rumen (RUSITEC) fed barley silage

2021 ◽  
pp. 1-13
Author(s):  
Paul Tamayao ◽  
Gabriel O. Ribeiro ◽  
Tim A. McAllister ◽  
Kim H. Ominski ◽  
Atef M. Saleem ◽  
...  
Keyword(s):  
Protein Synthesis ◽  
Fixed Effects ◽  
Block Design ◽  
Rumen Fermentation ◽  
Ruminal Fermentation ◽  
Microbial Protein ◽  
Rumen Microbiota ◽  
Alpha And Beta Diversity ◽  
Microbial Protein Synthesis ◽  
Barley Silage

This study investigated the effects of three pine-based biochar products on nutrient disappearance, total gas and methane (CH4) production, rumen fermentation, microbial protein synthesis, and rumen microbiota in a rumen simulation technique (RUSITEC) fed a barley-silage-based total mixed ration (TMR). Treatments consisted of 10 g TMR supplemented with no biochar (control) and three different biochars (CP016, CP024, and CP028) included at 20 g·kg−1 DM. Treatments were assigned to 16 fermenters (n = 4 per treatment) in two RUSITEC units in a randomized block design for a 17 d experimental period. Data were analyzed using MIXED procedure in SAS, with treatment and day of sampling as fixed effects and RUSITEC unit and fermenters as random effects. Biochar did not affect nutrient disappearance (P > 0.05), nor total gas or CH4, irrespective of unit of expression. The volatile fatty acid, NH3-N, total protozoa, and microbial protein synthesis were not affected by biochar inclusion (P > 0.05). Alpha and beta diversity and rumen microbiota families were not affected by biochar inclusion (P > 0.05). In conclusion, biochar did not reduce CH4 emissions nor affect nutrient disappearance, rumen fermentation, microbial protein synthesis, or rumen microbiota in the RUSITEC.

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