Open AccessASPECTS OF THE GROWTH OF CRIMEAN PINE INTRODUCED IN HERB-GRASS AND MIXED-GRASS STEPPE ZONE OF VOLGA-DON DISTRICT OF THE SOUTH OF THE RUSSIAN PLAIN
Author(s) -
Сергей Валерьевич Левин,
Aleksey Chernodubov
Publication year - 2020
Publication title -
aktualʹnye napravleniâ naučnyh issledovanij xxi veka: teoriâ i praktika
Language(s) - English
Resource type - Journals
ISSN - 2308-8877
DOI - 10.34220/2308-8877-2020-8-1-73-79
Subject(s) - scots pine , pinus <genus> , steppe , forest steppe , woody plant , geography , botany , forestry , biology , archaeology
Crimean pine (Pinus nigra subsp.pallasiana Lamb.) better than other introduced tree species fits the environmental conditions of the studied region, as it is highly resistant to various pathologies and can be used to form complex (multilayered) uneven-aged multispecies stands. The significant age of the studied stands (110 and 118 years old) provides a good indication of this fact, as well as allows us to make a judgement on the features of growth and development of Crimean pine mixed with Scots pine. It should be noted that when Crimean pine is mixed with Scots pine its average trunk volume is 2.5 times higher than that of pure Crimean pine stands. Research suggests that the best plant growth pattern for the steppe conditions is when Crimean pine strips are grown between the Scots pine strips. The best plant spacing is 2x1 m and at least 2 Crimean pine rows should be spaced between Scots pine rows. Such a pattern best suits the В2 site type according to Pogrebnyak’s classification which corresponds to mesophytic mixed forests.