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 Abstracts should not exceed 500 words; in Microsoft Word 97-2003, Times New Roman font size 12, single-spaced, up to 1 page, A4 format, margins: left and right - 2.0 cm, top and bottom - 2.5 cm.

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Title. Bold upper case, font 14. Title should be short and clear and reflect the essence of your research.

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Abstract Body:

Background. Briefly describe the relevance and current state of the investigated problem, specify the purpose of your research.

Methods. Specify the experimental scheme, research methods and the method of statistical processing.

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Abstract title templates:

Comparison of monensin and hop cones effects on rumen fermentation and blood parameters in transition dairy cows

I. Vudmaska1, A. Petruk2, R. Vaskiv1, V. Vlizlo1

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1Institute of Animal Biology, Lviv, Ukraine

2Stepan Gzhytskyi National University of Veterinary Medicine and Biotechnologies, Lviv, Ukraine

Objectives. The aim of research was to establish the effectiveness of using hop cones supplementation to diet for the regulation of rumen fermentation and metabolism in cows at the postpartum period and during lactation.

Methods. Thirty multiparous dry dairy cows were assigned to one of three treatment groups of ten cows each. The first group was control. To the diet of second group the monensin in a dose of 400 mg/head/day were added. Third group received diet with meal of dried hop cones for 10 g/head/day. The experiment lasted during transition period.

Results. Adding to the diet of both investigational supplements: monensin and cones of hops led to a decrease in the concentration of ammonia and increase concentrations of lactate and propionic acid in the rumen (p<0.05-0.01). Monensin reduced the pH in the rumen from 7.09 to 6.86 (p<0.05), and hop cones to 6.99. One week after calving in the blood plasma cows received monensin a higher concentration of glucose was observed. A decrease in the concentration of ketone bodies, urea and un-esterified fatty acids was detected in the blood plasma of both experimental groups (p<0.05-0.01). The addition of monensin cows increased the daily milk yield, but the milk fat content decreased. The feeding of hop cones did not affect milk synthesis.

Conclusions. Metabolic effects of hop cones are close to the antibiotic monensin, i.e. possess the properties of phyto-ionophores. Hop cones regulate rumen fermentation and metabolism in transition dairy cows, reduce the negative metabolic changes characteristic of transit cows and prevent a common metabolic disorders in high-yielding cows.

Keywords: cows, rumen, blood, monensin, hop

Lviv2