FORMATION OF MIXED AGRO-PHYTOCENOSIS OF PERENNIAL GRASSES UNDER THE GROWTH STIMULANTS USE

The purpose of the research is the formation of mixed hay-pasture grass-based costretsa; the application of growth stimulants in the Middle Volga region forest-steppe conditions. Growth stimulants use for plant growing along with other agrotechnical methods of intensive technologies of crop cultivation is absolutely relevant and advantageous method of increasing the productive efficiency. The studies were conducted by the fodder crop rotation laboratory staff of The Department of plant growing and agriculture of the Samara State Agricultural Academy on the base of field experience, taking into account the technical tips for field experiments with fodder crops. The article stipulates the results of studies taking into account the period between 2015-2018, with the assessment of seed quality, seed-ling emergence, plant height and overhead weight gain. The study of the herbage on the basis of the Awnless brome showed that good indicators of herbage formation parameters are achieved with bean components use. The best option Awnless brome + Smooth brome + Hungarian sainfoin, but mixture Awnless brome + Smooth brome + Alfalfa Sinegibridnaya provides herbage quality as well. Observations showed that the growth of culm in height occurs gradually from the beginning of vegetation (the grass tillering phase and branching in legumes) to the phase of fruit formation; the more components in the grass mixture, the higher its productivity. The use of rosta stim-ulants (Gumi 20M and Growth Matrix) leads to change in the parameters of herbage and the accumulation of over-head mass. The highest rates are observed in the phase of fruit formation with the maximum values in the grass-mixtures with bean components.