Expanded reproduction of Dnipropetrovsk forest landscapes involving breeding approaches (р. )

Abstract

The Dnepropetrovsk region has 198,6 hectaresof forest land, including subordinate by the regional department of forestry and hunting – 94,5 hectares, of which 90 % – artificial forests. Forests are concentrated mainly in flood plains, in the ravines and gullies. The main forest forming species in the region аre Pinus sylvestris, Quercus robur and Robinia pseudoacacia.Forests not have the industrial significance, they execute mainly ecological, protective and recreational functions. Accoding to the regional program "Forests of Dnepropetrovsk region for 2011–2015 years" the forest cover in 2015 year should increase to 6,8 %. As part of this program for a future forest-seed base establishment in region were investigated the best local stands and trees in 6 of the 7 existing state enterprises of the forestry management. The research were carried out in several woodlands. The pine and oak stands were aged over 40 years.It has been concluded that the most productive artificial stands of pine and oak in Dnipropetrovsk region are concentrated mainly in river terraces of Wolfish andDnieper. Some from ones are the gene reserves.The four pine stands have an artificial origin and are characterized mostly by a good status. Pine cultures created in different forest site types (A2, B2, C1, C2), at the same time the pines self-seeding on sites practically is absent. The understorey and undergrowth of deciduous species are very few in number or its coverage is no more than 25%. Accordingly pine stands are requiring of the reliable protection against the fire.Observed threeoak foreststands are the forest plantations, established in fresh and wet oakeries conditions, characterized by good and satisfactory state, 2 and 3 class of bonitet. Self-seeding of oak has been noted only at the site in wet conditions. The lack of conditions for natural regeneration necessitates their artificial afforestation.The best forest stands and in their territory the plus trees were selected. Overall 123 plus trees were selected (69 and 54 pine oak) were selected as a result of realized research in region.Subsequently, selected plus trees will be used for cuttings and seeds collecting and creating clonal archives, seed orchrads and progeny tests. According to the “Development Program of seed groving for 2010 - 2015 years” plan to create10 haclonal seed orchards and20 haof seedling seed orchards.