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Aim. Comparative analysis of milk productivity of cows with two- and three-time milking of animals. Materials and Methods. Experimental research were carried out on basis of a dairy complex of farm enterprise «Donskoe», LLC, Kalachevsky District of Volgograd Region. The object of the study was the milking herd of the Holstein breed. he cows were fed with diets balanced in accordance with the detailed feeding norms (Kalashnikov A.P. et al., 2003), taking into account the breed, age, live weight and milk productivity. The data of appraisal sheets and annual reports of the farm were used in the research process. Results. The transition from two-time to three-time milking of cows contributed to an increase in their milk productivity. In the first year, the average milk yield increased by 183 kg, the protein content – by 0.03%, in the second year – by 1083 kg and 0.03%, respectively, with an insignificant decrease in the fat content in milk – by 0.01%. The number of cows with a milk yield of more than 8000 kg of milk increased by 3.2-4.7% with transition to the system of three-times milking. Zootechnical and mathematical methods of analysis were used during the experiment. Conclusion. Analysis of the milk production of cows revealed the high efficiency of three-times milking in comparison with two-times milking with an interval of 8 hours between milking. |
