Nutritional value and productivity in mixtures of annual forage crops with clover white in the forest-steppe of the Middle Volga region

The results of studies conducted in the three-factor field experience in the 2015-2017 period in the experimental field of the Federal state scientific institute “Penza research Institute of agriculture”, for the study of nutrition and productivity of annual fodder crops in pure and mixed crops depending on the constituent mixture of the components, their seeding, the background of mineral nutrition are presents. Studies were carried out on leached black soil medium-loam, with high and increased availability of available forms of elements, according to conventional methods. Studied sudan grass, corn, pa Japanese millet, mohar, amaranth and sweetclover white annual when sown in pure and mixed crops, with seeding rates of legumes and associated components 70+40%, 55+55%, 40+70%. Doses of mineral fertilizers N45P45K45 and N60P60K60 were studied as nutrition background. The efficiency of cultivation of mixtures of annual sweet clover with corn and sweet clover with amaranth was revealed. In this case, the dry matter of feed contains the largest amount of exchange energy (10.2-10.5 MJ/kg dry matter) and feed units (0.84-0.90 in 1 kg dry matter). According to the content of digestible protein per 1 MJ of exchange energy (10-12 g) and per 1 feed unit (122-173 g), almost all the studied mixtures at all seeding rates and backgrounds of mineral nutrition met zoo technical requirements. The optimal indicators of sugar-protein ratio were obtained in a mixture of sweet clover with corn on all backgrounds at a seeding rate of 70 + 40%, as well as in a mixture of sweet clover with sudan grass under control at a seeding rate of 40+70%. The highest productivity among mixes differed crops of a melon with corn and a melon with a paisa with seeding rate of 40+70% and the increased background of food.