The effect of different concentrations of microalga Chlorella vulgaris supplementation on ruminal fermentation and blood indices in cows

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43210%2F25%3A43927328" target="_blank" >RIV/62156489:43210/25:43927328 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.2754/avb202594020111" target="_blank" >https://doi.org/10.2754/avb202594020111</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.2754/avb202594020111" target="_blank" >10.2754/avb202594020111</a>

Result language

angličtina

Original language name

The effect of different concentrations of microalga Chlorella vulgaris supplementation on ruminal fermentation and blood indices in cows

Original language description

This study examined the effects of dietary Chlorella vulgaris supplementation on ruminal fermentation, blood biochemistry, and protozoal composition in dairy cows. Four ruminally cannulated Simmental cows (6.00 +/- 0.83 years; 521.00 +/- 9.51 kg body weight) were assigned to x 4 Latin square over 72 days. Cows received abasal diet(ALG0) orthe same diet supplemented with 2.76 (ALG1), 8.22 (ALG2), or 16.3 (ALG3) g/kg odf dry matter (DM) of lyophilized vulgaris. Alga supplementation affected ruminal pH (P = 0.013), which was highest in ALG2 (6.69) and lowest in ALG3 (6.23). Nitrogenous compounds increased with algae inclusion, with NH3-N peaking in ALG2 (8.82 mmol/l; P = 0.001) and total nitrogen highest in ALG3 (5.8 g/kg; &lt; 0.001). Protozoal counts rose significantly with supplementation (P = 0.001), especially in ALG3. Volatile fatty acid concentrations and molar proportions were unaffected (P &gt; 0.10), and the acetate-to-propionate ratio remained stable. Blood biochemical indices were largely unchanged &gt; 0.05). Total protein tended to increase, while glucose showed a non-significant decline at highest alga dose. Other markers, including 3-hydroxybutyric acid (BHB), nonesterified fatty acids (NEFA) and liver enzymes, remained within physiological limits. These results suggest that vulgaris can enhance nitrogen metabolism and protozoal activity without adversely affecting metabolic health, supporting its potential as a functional feed additive in dairy nutrition.

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

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

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

Name of the periodical

Acta Veterinaria Brno

ISSN

0001-7213

e-ISSN

1801-7576

Volume of the periodical

94

Issue of the periodical within the volume

2

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

8

Pages from-to

111-118

UT code for WoS article

001536530200004

EID of the result in the Scopus database

2-s2.0-105012255289