Effects of Brown Seaweed (Ascophyllum nodosum) Supplementation on Enteric Methane Emissions, Metabolic Status and Milk Composition in Peak-Lactating Holstein Cows.

Autor: Bošnjaković, Dušan, Nedić, Sreten, Arsić, Sveta, Prodanović, Radiša, Vujanac, Ivan, Jovanović, Ljubomir, Stojković, Milica, Jovanović, Ivan B., Djuricic, Ivana, Kirovski, Danijela
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Zdroj: Animals (2076-2615); Jun2024, Vol. 14 Issue 11, p1520, 19p
Abstrakt: Simple Summary: Humanity faced the hottest year in observational history in 2023. If the trend of rising temperatures on Earth continues, irreversible changes in the environment will occur with negative consequences for the lives of us all. In order to limit the further increase in temperatures on Earth, it is necessary to reduce the emissions of greenhouse gases (GHGs) in various sectors. Since ruminant farming is a significant contributor to anthropogenic GHG emissions due to methane emissions, we attempted to reduce methane emissions in dairy cows by using brown seaweed (Ascophyllum nodosum) in cow rations. Indeed, we achieved a reduction in methane emissions, without disturbing the productivity of cows. We also found a more favorable metabolic status and milk composition in supplemented cows. Additional studies are needed to define precisely how brown seaweeds can be included into strategies to reduce methane emissions from the dairy industry. The dairy industry contributes significantly to anthropogenic methane emissions, which have an impact on global warming. This study aimed to investigate the effects of a dietary inclusion of brown seaweed Ascophyllum nodosum on enteric methane emissions (EMEs), hematological and blood biochemical profiles, and milk composition in dairy cows. Eighteen Holstein cows were divided into three groups: CON (non-supplemented cows), BS50 (50 mL of 10% A. nodosum), and BS100 (100 mL of 10% A. nodosum). In each cow, measurements of EME, dry matter intake (DMI), and milk yield (MY), as well as blood and milk sampling with respective analyzes, were performed before supplementation (P1), after 15 (P2) days, and after 30 (P3) days of supplementation. A. nodosum reduced (p < 0.05) methane production, methane yield, and methane intensity in both BS50 and BS100, and raised DMI (p < 0.05) only in BS50. Total bilirubin (p < 0.05) was higher in BS50 compared to CON cows in P2, and triacylglycerols were lower (p < 0.05) in BS50 than in CON cows in P3. Higher milk fat content was found in BS50 than in CON cows in P3. C16:0 proportions were higher (p < 0.05) in BS50 and BS100 than in CON cows, while C18:3n-3 was higher (p < 0.05) in BS100 than in BS50 and CON cows in P3. Dietary treatment with A. nodosum reduced EMEs and showed the potential to increase DMI and to improve energy status as well as milk composition in peak-lactating dairy cows. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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