Kotyash U. Productivity of Different Aged Meadow Stands Depending on Fertilization and Use Regimes in the Western Forest-Steppe

Subject of research - the perennial grass yield and feeding quality formation process depending on use phases, nitrogenous fertilizer spreading and the change of agrophysical indices of soil. The purpose - to estadlish the regularities of old-seeded and new-created grass stand species composition and productive feature formation depending on the differentiated moderate nitrogenous fertilizer application on grasslands and the change of regrowth periods of plant communities. The research methods are field, weight, chemical, statistical, computational and comparative. The regularities of unever-aged agrophytocenosis formation of lowland meadow are established by means of the fertilizer nitrogen distribution optimization depending on grass development stages in spring and the regrowth period length between next estrangements. The recomendation on rational fertilization and the use of unever-aged grass stands which allow to get 6.26-7.10 t/ha feed units with their production costs for one metric ton Hr 232.20-294.50, 0.89-0/92 t/ha digestible protein when secured on even grass feed entering for a vegetation period. The research results are introduced in 2006 in the Lviv region over on area 44 ha. The branch of application - the agricultural production.