Ecological potential of artificial stands of Scots pine in the Southern Urals

Abstract

The created artificial stands of Scots pine perform an extensive complex of ecological functions, in particular, carbon deposition. The accumulation of phytomass in artificial forest coenoses has certain features in comparison with other stands of trees. A comparison of the data obtained with the indicators of natural stands under similar conditions shows a more active accumulation of biomass by artificial coenoses. At the age of 11, with the number of trunks of 5,5 thousand copies/ha, the wood stock is 65 m3 / ha and phytomass (needles)-23 t / ha. It is possible to estimate the phytomass of pine forest crops on the territory of the Orenburg region at 2,8 million tons, respectively, the reserve of deposited carbon is 1,4 million tons. With increasing age of trees, the value of phytomass and plantings of the studied breed increases. Forest crops growing in the conditions of the forest-steppe zone, in one year, give an increase of 9,2 t / ha, or 13,1 m3/ha. The volume of total phytomass of forest crops of scots pine in the conditions of the forest-steppe zone at the age of 5-15 years is 2449,689 tons, and the reserve is 3250,511 m3. In the forest fund of the Orenburg region (according to the forest fund accounting data as of 01.01.2021), scots pine occupies 37,6 thousand hectares (without Buzuluksky Bor National Park), which is 9,3% of the total forest area. These are mainly forest crops, 99% of which are young and medium-aged plantings. The biopotential of scots pine crops in this region is quite high, but the sanitary condition of these stands is extremely poor. In order to improve the sanitary condition of common pine crops in the conditions of both forest-steppe and dry-steppe zones, to increase the biological productivity and stability of pine plantations, there is a need for timely forest pathology examinations with subsequent appointment of sanitary and health measures.

Features of the formation of the floodplain ecosystem of the black alder cluster in the conditions of the Orenburg Urals

“…On the territory of the Orenburg Urals, today there are few areas of high quality black alder plantations, well preserved, and the determining factor for their future is the organization of specially protected natural areas with regular phytomonitoring and a certain forest management regime [10].…”