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Abstract

To improve the mass breeding and productive qualities bred in Kazakhstan breeds of cattle were imported outstanding in respect of breeding bulls of different manufacturers productivity trends. In this regard, studies related to the study import bulls producers in comparison with native spermaproduktsii Ratios are relevant. The article presents data on the population and species composition of manufacturers bulls imported into the Republic of Kazakhstan in 2013 - 2015 years, the main countries - importers of bulls producers in the Republic of Kazakhstan. The effect of seasonality on the amount of semen produced from bulls imported
manufacturers.