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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

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

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Acta Veterinaria Brno

ISSN

0001-7213

e-ISSN

1801-7576

Svazek periodika

94

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

8

Strana od-do

111-118

Kód UT WoS článku

001536530200004

EID výsledku v databázi Scopus

2-s2.0-105012255289