Informace o publikaci
THE EFFECT OF SORGHUM SILAGE IN DAIRY DIETS ON DIETARY AND MILK FATTY ACID PROFILE AND MILK LIPID QUALITY INDICATORS – PRELIMINARY RESULTS
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| Rok publikování | 2025 |
| Druh | Konferenční abstrakty |
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| Popis | The study aimed to assess how incorporating sorghum silage into dairy cow diets influences the fatty acid (FA) profile in the total mixed ration (TMR) and in milk, as well as selected health and technological indicators of milk fat. The on-farm experiment was conducted on mid-lactating Czech Fleckvieh cows (Agrospol a.d. Knínice, farm Vanovice) over two consecutive periods of three months each. During the first period, cows received a TMR based on maize silage and grass haylage, while in the second period, part of the grass haylage was substituted with sorghum silage. In each period, feed samples were collected monthly. Milk samples were collected monthly from ten cows and were analysed for basic composition and FA profile. The FA profiles were analysed using gas chromatography with flame ionization detection. Incorporation of sorghum silage into the diet decreased the concentrations of palmitic and stearic acids and increased the concentration of linoleic acid in TMR (P < 0.05). This also influenced the final composition of milk fat. The inclusion of sorghum silage increased the contents of capric, lauric, stearic, oleic, linoleic, ?-linolenic, eicosatrienoic, heneicosanoic acids, monounsaturated FA, polyunsaturated FA, n-3 FA and n-6 FA in milk and decreased the contents of butyric, palmitic acids and saturated FA (P < 0.05). Sorghum silage in dairy diets also had positive impact on health and technological indicators increasing the content of essential FA, the ratio of hypocholesterolemic to hypercholesterolemic FA and spreadability index while also decreasing the n-6 to n-3 ratio, atherogenicity index and thrombogenicity index (P < 0.05). |
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