On the Kuralt farm, we monitored the diet of dairy cows for 3 months (from March 2021 to May 2021). In the barn there are around 50 dairy cows, mostly Simental, and some Holstein Frisian. The results of monthly milk yield (AT4) and milk nutrient content checks were used to monitor the response of the cows to the feed ration, which was regularly adjusted to ensure that it met the needs of the dairy cows. The basic ration consisted of grass, maize silage and hay. After chemical analysis of the roughage, we found that grass silage was below the average Slovenian analytical results for protein content, but average for energy content. Maize silage and hay were slightly above average. Before monitoring the dairy cows' diets, the daily milk yield was 26,36 kg, with a consumption of 200 g of strong feed per kg of milk. Energy utilisation was only 84,1 %. The fat content was 4,10 % and the protein content was 3,58 %. The basic ration was supplemented with energy and protein feeds, salt, a mineral and vitamin supplement and limestone. By adjusting the ration, we increased milk yield by 2,55 kg in three months, followed by a slight decrease in fat (4,04 %) and protein (3,43 %) in the milk. We reduced the use of strong feeds per kg of milk from 200 g to 120 g and increased the energy utilisation of the ration to 98,6 %.
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