In vitro and in vivo potential of a blend of essential oil compounds to improve rumen fermentation and performance of dairy cows

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62157124%3A16170%2F19%3A43878119" target="_blank" >RIV/62157124:16170/19:43878119 - isvavai.cz</a>

Alternative codes found

RIV/60460709:41210/19:80245 RIV/00027014:_____/19:N0000075

Result on the web

<a href="http://doi.org/10.1016/j.anifeedsci.2019.03.009" target="_blank" >http://doi.org/10.1016/j.anifeedsci.2019.03.009</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.anifeedsci.2019.03.009" target="_blank" >10.1016/j.anifeedsci.2019.03.009</a>

Result language

angličtina

Original language name

In vitro and in vivo potential of a blend of essential oil compounds to improve rumen fermentation and performance of dairy cows

Original language description

The objective of this study was to evaluate in vitro and in vivo potential of a specific commercial blend of essential oil active compounds (BEO) to improve rumen fermentation and general dairy cow performance. First, the main active components of the BEO were identified and quantified. Then, the in vitro experiment was conducted using 24 h batch incubation of buffered rumen fluid. The BEO was added at 0, 20, 100, 200, 600, and 1000 mg/l of culture fluid, with substrate containing forage and concentrate at a ratio of 60:40 dry matter (DM) basis. The concentrations of 600 and 1000 mg/l decreased (P &lt; 0.05) methane production per dry matter incubated (DMi) by 5.7% and 17.1%, respectively, and a concentration of 1000 mg/l decreased ammonia-N concentration by 10.0%. However, these reductions were accompanied by a decrease (P &lt; 0.05) in apparent dry matter disappearance (aDMd), and lowered (P &lt; 0.05) the net production of volatile fatty acids (nVFA) indicating, that there were no beneficial selective inhibitory properties of BEO supplementation. For the in vivo experiment, 30 lactating Holstein cows (two primiparous and 28 multiparous) in mid-lactation were randomly assigned to two treatments. During a 15 week period, cows in the control group (CON; n = 15) were fed the basal diet with no additive, and cows in the other group (BEO; n = 15) received the same diet supplemented with 1.2 g/cow/d BEO. Addition of BEO did not affect (P = 0.218) DM intake and milk yield (P = 0.102). For feed efficiency (P = 0.047) and body weight (P = 0.014), the treatment x time interactions were observed, with cows fed BEO having a lower average feed efficiency and a higher average body weight. BEO treatment tended to decrease the proportion of milk fat (P = 0.072), without affecting other milk quality parameters. BEO supplemented cows had lower VFA concentrations in rumen fluid (P = 0.006), and correspondingly, pH values were higher (P = 0.018). No differences were detected between the treatments for proportions of individual VFA and ammonia-N concentration. The responses of dairy cows on BEO were more pronounced after the 5th week of supplementation. This indicates the necessity of a longer adaptation period than commonly used in studies evaluating the effects of essential oils (EO). Due to energetic shift toward body weight gain additional attention should be paid to the systemic effects of EO. Generally, results from this study suggest that mid-lactation dairy cows did not benefit from being supplemented with BEO.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

40201 - Animal and dairy science; (Animal biotechnology to be 4.4)

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Animal Feed Science and Technology

ISSN

0377-8401

e-ISSN

—

Volume of the periodical

251

Issue of the periodical within the volume

May 2019

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

11

Pages from-to

176-186

UT code for WoS article

000465194400015

EID of the result in the Scopus database

2-s2.0-85063461913