Levchenko V. Natural seed regeneration in oak forests of north part of Right-bank Forest-Steppe

Object - process of natural regeneration in oak forests of north part of Right-bank Forest-steppe. The purpose of dissertation research consists in the detailed study of conformity process of regeneration of forest under canopy of the oak forests and on clear cuts of north part of Right-bank Forest-steppe.Research methods: forestry-fixedness the price - for the book-mark of trial areas with the purpose of establishment of indexes of the forests and study of natural seed regeneration of forest fixedness the price; laboratory-analytical - for determination of properties of forest soils physical and agricultural chemistry and chemical; forestry-ecological - for the study of forest descriptions of forests; mathematical and statistical - for treatment and analysis of experimental materials. Novelty - first for north part of Right-bank Forest-steppe factors are set, that periodicity, quantity and quality of fructification of common oak, is stipulated, which allow to promote efficiency of planning on thequestions of regeneration of forest resources; complex estimation of natural seed regeneration of main and concomitant arboreal breeds under canopy of the oak forests and on clear cuts is improved, which on abolition with existing one allows to ground the most rational methods of forming of the lasting, highly productive, biologically firm forests; the age-old dynamics of quantity and level of saving of natural seed regeneration of main and concomitant arboreal breeds under canopy of the maternal forests and on clear cuts is specified; the features of influencing of separate climatic indexes (late spring freezing, droughty second half of summer, quantity of precipitations, middle temperature of air) of vegetation period on fructification and volumes of purveyance of acorns of common oak are specified; influence of different groups of grass cover on saving and survival of sееdlings. The results of researches have the ponderable value for a theory and practice of forestry, in particular for forming and decision of the following tasks: increase of areas of the forests which recommence by a natural seed way; receipt of previous and subsequent natural seed regeneration of common oak; estimations of the use of natural seed regeneration of forest, how bases are for forming of the highly productive, biologically firm, lasting oak forests; application of methods main felling which are friendly to natural seed regeneration of common oak. Branch - forestry.