Академическое издательство «Гео»

Keywords: forest soils, postagrogenic communities, soil profile, satellite data, radiometric imagery.


Monitoring of transformation of postagrogenic soils in forest-steppe zone during the process of reforestation

T.V. Ponomareva, E.I. Ponomarev, A.S. Shishikin, E.G. Shvetsov

Sukachev Institute of Forest, Siberian Branch, Russian Academy of Sciences,
Akademgorodok, 50/28, Krasnoyarsk, 660036, Russia, bashkova_t@mail.ru, evg@ksc.krasn.ru,
shishikin@ksc.krasn.ru, eugeneshvetsov11@yandex.ru

We studied the trends of postagrogenic soil evolution under the pine forests of the forest-steppe zone in Krasnoyarsk krai. Original background soils of the study area are the dark gray (Phaeozems), gray (Luvisols) and sod-podzolic (Retisols) soils having a typical structure of the soil profile. After agricultural development of the forest area an arable horizon of profiles was formed. Hence, the soils may be assigned to the group of agrozems (Anthrosols). Studies were carried out near the Pogorel’skii Bor scientific permanent station operated by the Institute of Forest SB RAS, on the abandoned lands, for which we preliminarily determined the start time of postagrogenic evolution (7, 12 and 50 years). To identify the plots we used satellite imagery. Above-ground analysis of the soil state was performed using the author's technique for profile imaging in the infrared range. We confirmed the fact and obtained instrumental quantitative characteristics of the arable soil dynamics under forest-steppe pine forests, which acquire a typical structure for natural soils during a long period of reforestation; the signs of agrogenic effects persist as long as 50 years. On the other hand, the lower boundary of the relict arable horizon cannot be detected using expert morphological expert analysis but it is identified from imagery obtained in the thermal range. It is caused by the difference of the structure and thermophysical properties of arable and underlying horizons. Estimates are obtained of variability in spectral features for areas of postagrogenic soils in different succession stages by analyzing satellite imagery of high (Resurs-P) and low (Landsat/TM/ETM/OLD, TERRA/Modis) spatial resolution (for the period 1975–2015). It is proposed to use relative indicators characterizing the dynamics of the interpretive features in relation to the background areas spectral characteristics.

Keywords: forest soils, postagrogenic communities, soil profile, satellite data, radiometric imagery.

DOI: 10.21782/GiPR0206-1619-2018-2(154-161)