The paper touches upon the issues of the development of a fundamentally new automated hydroponic system for growing green fodder, which allows creating a solid fodder base capable to satisfy the need of livestock for nutrients throughout the year with low material costs. New hydroponic green fodder contains the required nutrients that contribute to the digestion of proteins, fats, carbohydrates into easily digestible organic components (amino acids, fatty acids and simple sugars) which are simpler in their structure. Moreover, it completely replaces compound feed, a mineral supplement in the diet milking cows and allows saving fodder every day. The new fodder uses the nutrients of the diet more efficiently, increases milk production and reduces fodder costs. During the research it was found that 100% replacement of compound fodder and 50% replacement of grain mass showed that when hydroponic green fodder from barley was introduced into the diet of cows, milk yield in the experimental group exceeded this indicator in the control group by 6%. The additional 549.5 kg was obtained from each cow for lactation as well as 549.5 × 20 = 10990 kg was obtained from the entire experimental group. The annual income from feeding green fodder was 329710 rubles at the purchase price of milk of 30 rubles / kg (10990 × 30) and the daily efficiency of compound fodder was (80.6 × 20) = 1612 rubles respectively and for the period of lactation it was 491660 rubles.