Kiki M. The Influence of Establishing Method and Growing Redimes for Scots Pine Planted Forests on Their Growth and Edaphic Conditions Changes in Izyum Steppe Bor

Object - formation of artificial pine stands in cultures of different density; occurring changes in soils under the influence of agrotechnical cultivation. The purpose is the definition of rational modes for the cultivation.of pine cultures in poor and dry conditions. Methods of comparative ecology, sylvicultural, taxational, agrochemical, mathematical - statistical. The results. The changes in a microrelief, morphology and agrochemical properties caused by intensive technology of cultivation on planting area and agrotechnical cares, are less shown and faster disappear in narrow rowed cultures, than in wide rowed ones. The realization of thinning in pine young stands decreases the accumulation of humus, phosphorus and nitrate forms of nitrogen in the upper soil layers. For the first thinning in pine cultures in habitats A1-2 is recommended to apply strong intensity of thinning and in dry forest -strong and very strong intensity, but the relative height (H/D) of the remained trees should not exceed 100.The application degree. The results of investigations are applied in forestry practice in Izium steppe bor on the area 200 hectares. The branch - of use is forestry.