| Autor: |
Al Adawi SA; Department of Animal and Veterinary Sciences, College of Agricultural and Marine Sciences, Sultan Qaboos University, P.O. Box 34, Al-Khod 123, Oman., El-Zaiat HM; Department of Animal and Veterinary Sciences, College of Agricultural and Marine Sciences, Sultan Qaboos University, P.O. Box 34, Al-Khod 123, Oman., Morsy AS; Livestock Research Department, Arid Lands Cultivation Research Institute, City of Scientific Research and Technological Applications, P.O. Box 21934, Alexandria 21934, Egypt., Soltan YA; Department of Animal and Fish Production, Faculty of Agriculture, University of Alexandria, Aflaton St., El-Shatby, P.O. Box 21545, Alexandria 21526, Egypt. |
| Jazyk: |
angličtina |
| Zdroj: |
Animals : an open access journal from MDPI [Animals (Basel)] 2024 May 31; Vol. 14 (11). Date of Electronic Publication: 2024 May 31. |
| DOI: |
10.3390/ani14111649 |
| Abstrakt: |
The exploration of natural alternatives to antibiotics for enhancing productivity and performance in dairy cows is a crucial objective in farm animal management. This is the first study aimed at developing and evaluating the physicochemical properties and effects of Arabic gum-nano montmorillonite (AGNM) compost compared to ionophore monensin as feed additives on rumen fermentation, blood metabolites, and milk production of Holstein dairy cows. In a replicated 4 × 4 Latin square design, four multiparous mid-lactation Holstein dairy cows with an average body weight of 520 ± 15 kg were enrolled. The dietary treatments included a control diet (basal diet without feed additives), monensin diet [a basal diet supplemented with 35 mg/kg dry matter (DM) monensin], and AGNM diets comprising basal diet supplemented with two levels: low (L-AGNM) at 1.5 g/kg DM, and high (H-AGNM) at 3 g/kg DM. AGNM as a feed additive demonstrated promising physiochemical parameters, including containing highly bioactive components (α-amyrin and lupeol), functional groups (OH and Si-O), and essential mineral contents (Mg 2+ ). Supplementations with H-AGNM significantly improved ruminal ( p = 0.031) concentrations of total volatile fatty acids (VFAs), acetic ( p = 0.05) and butyric ( p = 0.05), enhanced ( p < 0.05) digestibility of fiber and organic matter, while decreased ( p = 0.013) estimated methane production. However, an increase ( p = 0.04) in blood high-density lipoprotein levels and decrease ( p < 0.05) in concentrations of creatinine (CREA), bilirubin (BILT), cholesterol (CHOL), and sodium (Na) were observed with H-AGNM supplementation. Both monensin and H-AGNM improved ( p = 0.008) feed efficiency compared to L-AGNM; however, neither AGNM nor monensin affected the milk composition or energy status indicators of the dairy cows. The findings of this study highlight the potential of AGNM as a natural candidate to replace monensin in enhancing ruminal VFA production, nutrient digestibility, feed efficiency, blood metabolites, and milk yield in dairy cows. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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