Publications by authors named "R J Mikula"
The objective of this study was to determine the effect of the rumination time on milk yield and composition as well as methane emission during lactation in high-yielding dairy cows fed a partial mixed ration based on maize silage without pasture access. A total of 365 high-yielding Polish Holstein-Friesian multiparous dairy cows were included in the study covering 24 to 304 days of lactation. Methane emission, rumination time, and milk production traits were observed for the period of 12 months.
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- This study investigates spexin as a potential blood marker during the transition period in dairy cows, exploring its relationship with various biochemical metabolites and hormones.
- Spexin levels decrease leading up to calving, with the lowest concentrations observed on calving day, followed by a rise during the first two weeks of lactation, indicating an important change in the transition process.
- The research finds correlations between spexin and other metabolites, specifically a negative correlation with nonesterified fatty acids and total ghrelin, while showing a positive relationship with progesterone levels, suggesting spexin’s involvement in dairy cow metabolism and health during this critical period.
The aim of the study was to determine the effect of propylene glycol and maize grain content by-pass starch supplementation during the transition period and the first 56 days of lactation on blood metabolic indices, milk production and fertility parameters in dairy cows. Seventy-five Polish Holstein-Friesian dairy cows were assigned to treatment 21 days before calving. The treatments included: TG-2.
View Article and Find Full Text PDFGrowth Performance, Gut Environment and Physiology of the Gastrointestinal Tract in Weaned Piglets Fed a Diet Supplemented with Raw and Fermented Narrow-Leafed Lupine Seeds.
Animals (Basel)
November 2020
The aim of this study was to: (1) provide controlled fermentation of narrow-leafed lupine seeds; (2) monitor seed composition, and (3) determine the influence of fermentation on the performance, gut environment and physiology, and selected blood metabolic parameters, in young pigs. Firstly, the effect of 24 h lupine seed fermentation by bacteria and yeast on seed chemical composition was determined. It increased contents of crude protein, crude fiber and ash, but reduced nitrogen-free extractive levels.
View Article and Find Full Text PDFIn this study, the effect of grinding or pelleting of rapeseed on the digestibility, apparent metabolisable energy (AME), growth performance and gizzard weight of broiler chickens was evaluated. In Exp. 1, four treatments were tested (240 broiler chickens, 20 replications, 3 birds per cage).
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