Protsyk Y. Metabolism of propionic and linolic acids in cattle organism at addition of various urea forms to ration

The objects of research - metabolism of propionic and linolic acids in rumen liquid, blood and tissues of fattenings bulls at adding to the ration of urea and methylenediurea; the purpose of research - to establish influence of urea and methylenediurea at addition the ration of fattening cattle on content of propionic acid and different forms of linolic acid in a rumen liquid, blood, liver and skeletal muscles; Research methods and apparatus - gas chromamatography (research of content of propionic acid and different forms and isomers of linolic acid), zoo-technique (analysis of forages and intensity of animals growth), statistical (average value, average error and probability of difference); Theoretical and practical results, novelty - are established the concentration of different forms and isomers of linolic acid, and also content of propionic acid in forage, rumen liquid, blood, liver, skeletal muscles of fattenings bulls at the urea and methylenediurea using in their feeding. Influencing of added to the ration of both forms of urea on growth of animals is studied. Is established the stimulant influencing of both forms of urea on propionic fermentation and inhibition influence on hydrogenisation of linolic acid in the rumen of fattening cattle. Is determined increase of general concentration of linolic acid and diminishing of amount its trans- form in rumen liquid, blood, liver, skeletal muscles of cattle at feeding by urea and methylenediurea. Improved row of existent methods of determination the amount of propionic and different forms and isomers of linolic acids in biological objects; Object and degree of introduction - for multiplying additional weights of living mass and improvement of biological value of meat of fattenings bulls it is recommended to feed the methelenediurea together with the sodium sulfate. IT is inculcated in the experimental economy of the Moutain-Carpathians station of the Zakarpattya region and in OJSO "NYVA" of the Kamyanka-Bus'k district Lviv region; the field of applicationis biology and farm animals feeding.