Malynka L. Lowland Meadow Productivity of the Ukrainian Polissia Depending on Undersowing Terms of Perennial legume Grasses.

Object of research is the process of legume-grass meadows stand formation on the lowland meadows of the Polissia of Ukraine with use of different species of leguminons grasses; The purpose - to establish the regularities of legume-grass stand formation, depending on the under sowing terms in them of different species of legume-grasses and develop the energy- and resources-saving technology of the lengthening of productive longevity of sown legume-grass stands at the superficial improvement of lowland meadows of the Polissia of Ukraine; The methods are - visual, measuring and weight, computational, analytic, economic and mathematical; The novelty - first in the conditions of the region the possibilities of the lengthening of productive longevity of sown legume-grass stands by undersowing in them with replacement after the years of the use of legume components are revealed. The influence of different species of legume-grasses at undersowing of them in mitialred clover-grass alfalfa-grass stands and the terms of its conducting on the features of specific structure of cenoes, productivity of lowland meadows, the accumulation of symbiotic nitrogen, biochemical composition of forage aredetected; The results - the proposals to production are developed on the creation of technologies of the lengthening of legume components partisipation in meadow stand which provides the possibility of obtaining 50-60 hkg dry mass, 40-50 hkg feed units, 9-10 hkg raw protein per hectare at a saving 90-110 kg of mineral nitrogen and 30-40% of total expenditures energy; The developed technologies are introduced at different agroformations of Poltava and Kyiv regions over a total area 250 ha; The brand - agriculture.