DISTRIBUTION AND FORMATION OF UNDERGROUND IN THE PINE FORESTS OF SHEPETIVSKY POLISSY

Abstract

The forestry and taxonomic indicators of 56-90-year-old pine stands growing in the conditions of fresh and moist sogruds and subors were analyzed and 10 species were found in their undergrowth. Among the understory species, the most common are mountain ash, buckthorn and hazel, which occur in 78.6-100.0 % of plots. Other understory species occur in 7.1-42.9 % of stands. It is established that the total amount of undergrowth in forest stands varies between 13.67-76.67 specimens • ha-1 and does not depend on the type of forest or forest vegetation conditions. 2-3 stands of undergrowth mainly occur in stands of stands, and 4-7 undergrowth species in stands. Dominant in the forests are the common humpback and the brittle buckthorn, and in some areas the European buckthorn. In the stands of sogruds, in addition to rowan and buckthorn, hazel is also significantly represented, and in some areas barberry is common. Dominant in the forests are the common humpback and the brittle buckthorn, and in some areas the European buckthorn. In the stands of sogruds, in addition to rowan and buckthorn, hazel is also significantly represented, and in some areas barberry is common. The least in the undergrowth are prickly thorns and prickly hawthorn. It is established that the occurrence of undergrowth in the vast majority of research sites is more than 80 %. Rowan, buckthorn and hazel are characterized by high rates of occurrence in a significant number of areas, and in some stands – European cowberry and barberry. The highest average height in the stands is reached by hazel (58-403 cm), rowan (55-263 cm), buckthorn (51-225 cm) and barberry (50-207 cm) and significant elder (43-210 cm) and bird cherry (125-170 cm). Hazel, mountain ash and barberry are characterized by a predominance of large undergrowth, the share of which is 50-100 %.