ISSN 1067-4136, Russian Journal of Ecology, 2006, Vol. 37, No. 6, pp. 408–413. © Pleiades Publishing, Inc., 2006.
Original Russian Text © E.V. Prosyannikov, V.B. Osipov, G.V. Chekin, 2006, published in Ekologiya, 2006, No. 6, pp. 446–451.
The soils of bog ecosystems are known to accumu-
late and transform radionuclides (Polyakov et al., 1962;
Evans and Dekker, 1967; Tyuryukanov et al., 1973;
Molchanova and Karavaeva, 1981; Ponikarova et al.,
1995; Orlov, 2000). However, there is little information
about the forms of radioactive cesium, its migration in
peaty soils, and the inﬂuence of physicochemical soil
properties and concentrations of typomorphic elements
on its behavior. In this relation, the purpose of this
study was to analyze these processes in the southwest-
ern part of the Russian Federation, which was most
heavily contaminated after the Chernobyl accident.
OBJECTS AND METHODS
Field studies were performed in Bryansk oblast,
using the method of soil keys, from 1990 to 1999. A
permanent monitoring station with three key soil plots
(KSP)—Topilovskii, Veprinskii, and Krasnogorskii—
was established in natural ecosystems of transitional
bogs. Each key plot included one to three permanent
test plots 25–30 m
in size, which were located closely
to each other in the same type of the bog site (facies).
(the village of Staryi Vyshkov,
Novozybkovskii raion): Golnoe Topilo site, a transi-
tional bog in a deep depression amid old arable ﬁelds.
bog humus-peaty transitional soil (
1977) with 20–50% peat decomposition and the
groundwater table at a depth of 40 cm.
(the village of Veprino, Klints-
ovskii raion): a transitional bog in the forest. Vegeta-
Eriophorum vaginatum, Ledum palustre
spp. Raised-bog humus-peaty transi-
tional soil with 20–50% peat decomposition and the
groundwater table at a depth of 25 cm.
(Krasnogorskaya forest site,
Krasnogorskii raion): a transitional bog in the forest.
Betula pubescens, Pinus sylvestris, Erio-
phorum vaginatum, Ledum palustre, Oxycoccus palus-
tris, Vaccinium vitis-idaea, V. myrtillis, V. uliginosum
spp. Raised-bog peaty-gley ferruginous
humic soil with 10–30% peat decomposition and the
groundwater table at a depth of 30 cm.
Soil pits were established in these plots in August–
September 1990, 1992, and 1999. Soil samples were
taken from every 2-cm layer to a depth of 30 cm and
from every 5-cm layer at greater depths. Soil samples
were processed and their physicochemical properties
were determined (Table 1) by conventional methods
, 1961). Different forms of
secutively extracted with distilled water, 1 N ammo-
nium acetate, and 6 N hydrochloric acid, with the soil :
solution ratio being 1 : 50.
Speciﬁc activity of
was determined by the
method of semiconductor
-spectrometry in an
IN-1200 instrument with a germanium detector (Ortek)
and by a scintillation method in an RUB-01P6 counter
with a BDKG-03P detector. The speciﬁc radioactivity
in the soil before extraction was taken as its
total content in calculations of
fractions. Amorphous organic forms of iron were
extracted with 1 N solution of sodium pyrophosphate.
Concentrations of iron were determined by a colorimet-
ric method and expressed in mg/dm
concentrations were expressed in kBq/dm
. These units
of measure were chosen because of considerable
changes on the density of peaty soils down the proﬁle.
Cs in Soils of Transitional Bogs
E. V. Prosyannikov, V. B. Osipov, and G. V. Chekin
Bryansk State Agricultural Academy, Kokino, Vygonichskii raion, Bryansk oblast, 243365 Russia
Received January 16, 2006
—Speciﬁc features of
accumulation, transformation, and migration in humus-peaty and peaty-
gley soils of transitional bogs are discussed with reference to the southwestern part of the Russian Federation,
which was most heavily contaminated after the Chernobyl accident. The inﬂuence of physicochemical soil
properties and concentrations of typomorphic elements on these processes is characterized. It is concluded that
bog soils accumulate
in the form of hardly movable compounds and, as a consequence, transitional bogs
are transformed into critical ecosystems.
: transitional bogs,
Cs, radioactive contamination.