Bondar І. Віotic circulation of mineral elements in pineries and the ways to control it in the pineris of Central Forest region of Ukraine

Research object: pure and mixed pine foreststands of Central Polissya of Ukraine. Research purpose: to define types and intensity of circulation of ashy elements and nitrogen; to find out influence of admixture of leafy arboreal breeds on the state of the ground absorptive complex; to work out the ways of adjusting of biotic circulation of mineral elements, predetermining the increase of the productivity and foreststands firmness. Research methods: forestry-valuation, field and laboratory researches, analysis of ashy composition of mineral elements, physiology, biochemical, aerophare, statistical. Scientific novelty: three types of biotic circulation of mineral elements are set; the ecological role of leafy arboreal breeds is first grounded in composition pineries; it is rotined that deep-rooting leafy arboreal breeds are instrumental in the improvement of ecological firmness of forest soils; the scale of estimation of types of forestplants terms is offered. Degree of introduction: lectures and discussions are on annual scientific conferences in NAU, international scientific and scientific-practical conferences; acts of introduction for 2002-05. Branch of use: forestry.