Year 2026, Volume 72 Issue 2
| Year : | 2026 |
| Volume : | 72 |
| Issue : | 2 |
| Authors : | Yuriy BALJI; Gulim ABAKANOVA; Leila SULTANAYEVA; Yevgeniy MAYER; Oksana KRAVCHENKO; Galia ZAMARATSKAIA |
| Title : | OPTIMIZATION OF EXTRUDED ENRICHED FEED ADDITIVES PRODUCTION PROCESS AND THEIR EFFECT ON BLOOD PARAMETERS OF HOLSTEIN COWS |
| Abstract : | Feeding strategies improve livestock productivity and product quality. This study optimized extruded enriched feed additive (EEFA) production and evaluated short-term blood effects in primiparous Holstein cows. EEFA (corn-based, 1.5% plant extract) process optimization (die 2-8 mm, moisture 5-30 L) identified 8 mm die and 15-17% moisture as optimal (650 kg/h, low losses). NIRS showed reduced moisture (8%) with concentrated protein (10.2%), fat (4%), fiber (3.8%), ash (2.8%). In a 20-day trial, 37 primiparous Holstein cows (60 days post-calving, 450-470 kg BW, 28-29 kg milk/day) received a standard basal ration or basal ration with 3 kg EEFA/cow/day as-fed (2.6-2.7 kg DM, two 1.5-kg portions; convenience allocation without randomization or baseline balance check). No hematological changes occurred. Biochemical effects included higher ALT/cholesterol, lower urea (P<0.05), suggesting metabolic shifts. Further studies should also include animal health monitoring, rumen function assessment, and detailed nutritional evaluation to better understand the mechanisms behind the observed metabolic changes. |
| For citation : | Balji, Yu., Abakanova, G., Sultanayeva, L., Mayer, Y., Kravchenko, O., Zamaratskaia, G. (2026). Optimization of extruded enriched feed additives production process and their effect on blood parameters of Holstein cows (2026). Agriculture and Forestry, 72 (2): 123-135. https://doi:10.17707/AgricultForest.72.2.09 |
| Keywords : | extrusion, phytobiotics, feed, cows, blood test |
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