Efficiency of use of land and feed resources to increase milk productivity of cows

The purpose of the research was to study the effi ciency of using land and feed resources to increase milk productivity of cows. Research on the quality of soil and prepared silage was carried out under the conditions of JSC Agrofi rma Pravda, Sterlibashevsky district, Republic of Bashkortostan. The quality of silage was studied on cowsof Simmental dreed, which were selected based on the principle of pairs-analogues, taking into account age and physiological condition. Three groups of cows were formed per 10 heads in each group. In the experiment, cows of the 1st control group have received silage mass without preservatives, the 2nd experimental group received silage with the addition of the bio-preservative Lactobifadolin a dose 150 g/t into the silage mass and the 3rd experimental group received silage with the bio-preservative Lactoenterolin the dose 150 g/t. It was found as a result that the content of nutrients in the soils of the farm increases. Thus, the humus content increased by 1.4 abs.% over 5 years, mobile phosphorus by 13.5 %, exchangeable potassium by 4.6 %. A uniform situation was observed for other elements. Feeding lactating cows with silage prepared with bio-preservatives contributed to a more favorable course of mineral, fat and protein metabolism, and accordingly to the complete absorption of nutrients in the digestion process. Cows in the experimental groups had higher milk productivity during the fi rst 100 days of lactation, and used biologically active substances to a better extent for the synthesis of milk components. The inclusion of bio-preservatives in silage made it possible to accelerate the fermentation process in the ensiled mass, reduce nutrient losses and increase its energy and protein value.