OILSEED FLAX SEEDS IN MIXED FEEDS FOR LACTATING COWS

The purpose of the research is to study the effectiveness of using flax seeds of the oilseed variety Kinelsky 2000 in feeding lactating cows. Oilseed flax seeds contain 37.0% oil, 22.0% crude protein. The main part of fat is linolenic acid, an analogue of vitamin F. In terms of amino acid composition, flax seed protein is close to soy protein. This gives reason to consider the possibility of using oilseed flax seeds in the diets of highly productive lactating cows. In scientific and economic experience on two groups of lactating cows of 8 heads each, the effect of compound feeds with a content of 10.0% by weight of flaxseed on feed consumption and the digestibility of nutrients in the diet was studied. The inclusion of flaxseed concentrate in the feed provides an increase in milk productivity by 4.2%. Reducing the cost of producing 1 kg of milk by 4.0% fat content: 1.4% by WEIGHT, 3.0% by dry matter, 3.5% by concentrates. The replacement of 10.0% soy meal in a compound feed concentrate with oilseed flax seeds increases the digest-ibility of nutrients in the diet feed: dry matter by 0.7 abs.%, crude protein – by 0.4 abs.%, crude fat – by 0.2 abs.%, fiber – by 0.2 abs.%, BEV – by 0.3 abs.%. The "loss" of nitrogen in urine in cows of the experimental group was lower than the control by 1.4 g (or 1.3%). Nitrogen absorbed from the gastrointestinal tract in cows of the 2nd experimental group was better used by their body than in animals of the 1st control group for the synthesis of milk protein. The inclusion of flour from flax seeds of the oilseed variety Kinelsky 2000 in the composition of compound feeds concentrates for lactating cows provides an improvement in the digestibility of nutrients in the diet. This is accompanied by an increase in dairy productivity. The inclusion of 10.0% by weight of flax seed flour in the composition of compound feed concentrate for lactating cows is economically feasible.