Abstract
The article presents the results of feeding dairy cows in loose housing according to detailed nutrition requirements, depending on milk productivity. Experimental research were conducted on basis of a dairy complex of farm enterprise «Donskoe», LLC, of Kalachevsky District of Volgograd Region. The number of cows on the farm enterprise was 2500 animals at the beginning of the experiment. The feeding diets are presented for each of the groups of cows, formed in accordance with the daily productivity, indicating the main elements of nutritional and energy value. The increase in the energy value of the ration provided an increase in milk productivity. Thus, the energy value of diets increased from 234.53 MJ of exchange energy for cows with a minimum productivity of 29 kg of milk per day (first group) to 302.47 MJ of metabolic energy for cows with a maximum milk productivity of 35 kg and more (third group). The dry matter content in the diet increased from 23.22 to 27.93 kg, crude protein – from 3406.70 to 4624.48 g, respectively. The number of highly productive cows increased by 16.1%, productivity increased by 11% due to the transition to differentiated feeding.
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