Pregledni rad
https://doi.org/10.33128/k.67.1.6
The use of algae in the small ruminant nutrition
Željka Klir Šalavardić
orcid.org/0000-0003-4078-6864
; Fakultet agrobiotehničkih znanosti Osijek, Sveučilište J. J. Strossmayera u Osijeku, Osijek, Hrvatska
Josip Novoselec
; Fakultet agrobiotehničkih znanosti Osijek, Sveučilište J. J. Strossmayera u Osijeku, Osijek, Hrvatska
Danijela Samac
orcid.org/0000-0001-9277-3710
; Fakultet agrobiotehničkih znanosti Osijek, Sveučilište J. J. Strossmayera u Osijeku, Osijek, Hrvatska
Mario Ronta
; Fakultet agrobiotehničkih znanosti Osijek, Sveučilište J. J. Strossmayera u Osijeku, Osijek, Hrvatska
Zvonko Antunović
; Fakultet agrobiotehničkih znanosti Osijek, Sveučilište J. J. Strossmayera u Osijeku, Osijek, Hrvatska
Sažetak
On the basis of available scientific literature, this paper’s objective was to research a possibility of using the algae in the small ruminant nutrition and to research its effect on the production and products’ quality. A chemical composition of the different types of algae mostly differed in terms of a protein and fat content and in fatty acid concentrations. As a source of proteins and the well-balanced amino acids, Chlorella vulgaris and Spirulina platensis are the most known algae used in the small ruminant nutrition. Algae are very rich in the long-chain polyunsaturated fatty acids from the n-3 group (e.g., the eicosapentaenoic acid, EPA, and the docosahexaenoic acid, DHA), especially the algae from the genera Schizochytrium and Aurantiochytrium. The addition of 5 g/day of Schizochytrium limacinum to the goats’ diet did not result in significant changes in milk production, but it effectuated an increase in the conjugated linoleic fatty acid (CLA, C18:2 c9t11), an increase in the DHA, and a decrease in the n-6/n-3 ratio in milk. Chlorella vulgaris supplementation at 5 and 10 g/day had a beneficial effect on milk production and an increase in the CLA in goat’s milk. In the studies with the lambs fed with 2.5% of algae (Aurantiochytrium limacinum) in the feed mixtures, no significant differences in daily intake, average daily weight gains, and body weight prior to slaughter were detected. The study discovered an increase in the EPA and the DHA in the intramuscular fat of the lambs fed with the algae-added feed mixtures. The dietary algae, such as the Asparagopsis taxiformis, reduces methane production in the small ruminants’ digestive system. In the future studies, it is necessary to examine the effect of the different types and quantities of algae in a diet on the production traits and on a small ruminant metabolic profile in more detail. Besides, it is necessary to analyze the economic profitability of the use of algae in the sheep and goat nutrition.
Ključne riječi
algae; nutrition; sheep; goats; fatty acids
Hrčak ID:
333412
URI
Datum izdavanja:
30.6.2025.
Posjeta: 576 *