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Identification of Postagrogenic Forests in Kenozero National Park. P. 75–82

Версия для печати

Section: Biology

UDC

630*261

Authors

Nakvasina Elena Nikolaevna
Northern (Arctic) Federal University named after M.V. Lomonosov Naberezhnaya Severnoy Dviny, 17, Arkhangelsk, 163002, Russian Federation;
e-mail: nakvasina@yandex.ru
Golubeva Lyubov’ Vladimirovna
Arkhangelsk Pedagogical College Smolny Buyan str., 5, Arkhangelsk, 163002, Russian Federation; Northern (Arctic) Federal University named after M.V. Lomonosov Naberezhnaya Severnoy Dviny, 17, Arkhangelsk, 163002, Russian Federation;
e-mail: lgv76@rambler.ru

Abstract

The forests of Kenozero National Park (Arkhangelsk region) are characterized by the alternation of natural and postagrogenic uneven aged stands, due to the density of settlement and land development activity by slash-and-burn farming since the XI century. Ground cover of old postagrogenic growths preserves the arable characteristics, the soil remediation typical for the taiga zone does not occur. Ground cover has a complex ecological and cenotic structure associated with the unfinished process of old lands changing from meadow to the forest stage. The forest typing requires the special classification approaches. Postagrogenic forest soils retain all the features of the arable state. Despite the long period of postagrogenic remediation and the formation of typical taiga biogeocenoses, the process of natural zonal soil remediation is not observed. The features of modern podzolization appear only in the high places. The high-density pure single-storey pine or birch forest stands grow on the old lands. They are 1 yield class higher than the natural plantations on the native soils. These stands are spaced; the number of trees of the maturity age is less than 50 % of the plants, which are formed in natural forest site factors. But still their forest yield corresponds to the other plantations of the same age. Coniferous young growth in the postagrogenic forests is usually absent. Pine radial growth is greatly enhanced, the width of the annual rings increases. Their indexes significantly exceed the average data for the species in the region. Basic wood density of pine on the old lands is by 10 % lower the standard indicators. High productivity of the forests formed on the postagrogenic lands is the basis for the old lands use to accelerate the cultivation of timber plantations.

Keywords

postagrogenic forest, soil remediation, postagrogenic forests productivity
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