[Properties of milk extender with different composition used for dilution of the bull's sperm]
2001
Medvedev, G.F. | Anikevich, L.P. (Academy of agricultural Sciences, Gorki (Belarus))
Article provides the results of the research on physical and biological properties of the two components milk extender for dilution of the bull's sperm. The skimmilk with fat content of 0,05-0,08%, homogenized cream, glycerin and polygene are the basic components of the first option of the extender, another option requires adding fructose solution, glycerin and polygene. The osmotic pressure of the extenders was 290+-1 and 284+-1 mOsms; pH 6,66+-0,01 and 6,61+-0,01 respectively. When diluting and freezing the bull's sperm in granules or pellets milk extender ensured the viability 30-40% of spermatozoa as well as preservation of their structure and biological properties. The percentage of the cells with damaged acrosoma (among mobile) did not exceed 7-8. Insemination of heifers and cows with such sperm yielded higher results of fertilization (77,5% on average). The insemination with the sperm diluted with lactosa-egg-glycerine extender had 62,1%
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