PRODUCTIVITY OF FOREST STANDS WITH THE OAK PARTICIPATION IN THE VOLYN STATE MILITARY FORESTRY ENTERPRISE

Abstract

The results of typological analysis of stands with the participation of common oak growing in different types of forest in the conditions of the State Enterprise "Volyn Military Forestry Enterprise" are presented. The actual and potential productivity, types of stands, as well as the silvicultural efficiency of forest vegetation use by stands in different types of forest of the military forestry enterprise are established. In the Volyn Military Forestry Enterprise stands with the participation of common oak occupy small areas, which is due to the characteristic forest vegetation conditions. In the most common forest types such as moist hornbeam forest and fresh hornbeam-oak-pine fairly fertile site type a decrease in stand productivity was detected, the average actual stock of stands is 176 and 277 m3·ha-1 respectively and the potential opportunities of forest vegetation conditions are used by 84 and 92%. An increase in the average stand stocks in these forest types was recorded up to the seventh age class and from the eighth age class onwards a decrease in the average actual stocks was observed. The maximum average actual stock of stands in the wet fairly fertile site type conditions is 255 m3·ha-1 at the age of 101–120 years, the average actual stock of old-growth stands (161 years and older) is 187 m3·ha-1, and mature and overmature stands aged 121–160 years vary within 203–205 m3·ha-1. Overmature hornbeam-oak stands of moist hornbeam forest use potential forest vegetation conditions by only 42–47% and are characterized by the lowest productivity. The dominant forest types of the military enterprise are dominated by secondary and medium-density stands. The share of secondary stands, which in humid conditions form nine species of trees in the dominant forest types is 59–62%, and in the high-density secondary stands is 8–23%. In the conditions of the wet fairly fertile site type of the military forestry secondary birch forests (50.3%) and oak forests (3.8%) predominate. In the fresh conditions, secondary oak forests (32.0%) and pine forests (23.3%) dominate. In the humid hornbeam forest secondary stands of hornbeam and pine are common in small areas (1.9% of each species), and small areas of red oak, alder, spruce, and silver maple forests are found rarely.