Volume 02 Issue 11-2022
17
American Journal Of Agriculture And Horticulture Innovations
(ISSN
–
2771-2559)
VOLUME
02
I
SSUE
11
Pages:
17-20
SJIF
I
MPACT
FACTOR
(2021:
5.
705
)
(2022:
5.
705
)
OCLC
–
1290679216
METADATA
IF
–
5.625
Publisher:
Oscar Publishing Services
Servi
ABSTRACT
The paper presents the quantity and quality of salts in the solonchaks of Central Fergana. Soda was found in the profile
of solonchaks in the amount of 0.08-0.19%. Solonchak vegetation is characterized by high ash content, while it is found
that in salt marshes of the desert zone, arsenic accumulates in the amount of 7-8 CC, the biological absorption
coefficient is 1.17-11.9.
KEYWORDS
Salt marsh, soda, sol, arsenic, accumulation, Clarke concentration, biological absorption coefficient.
INTRODUCTION
Currently, it has been proven that many trace elements
significantly affect the soil-forming process and the
formation of solonchaks in the desert zone. The
distribution of the quantity and quality of a number of
Research Article
HALOGEOCHEMISTRY, BIOGEOCHEMICAL FEATURES OF SALINE
LANDSCAPES IN CENTRAL FERGANA
Submission Date:
November 05, 2022,
Accepted Date:
November 15, 2022,
Published Date:
November 30, 2022
Crossref doi:
https://doi.org/10.37547/ajahi/Volume02Issue11-03
G. Yuldashev
Researcher Ferghana State University, Uzbekistan
U. B. Mirzaev
Researcher Ferghana State University, Uzbekistan
A. Rakhimov
Researcher Ferghana State University, Uzbekistan
Journal
Website:
https://theusajournals.
com/index.php/ajahi
Copyright:
Original
content from this work
may be used under the
terms of the creative
commons
attributes
4.0 licence.
Volume 02 Issue 11-2022
18
American Journal Of Agriculture And Horticulture Innovations
(ISSN
–
2771-2559)
VOLUME
02
I
SSUE
11
Pages:
17-20
SJIF
I
MPACT
FACTOR
(2021:
5.
705
)
(2022:
5.
705
)
OCLC
–
1290679216
METADATA
IF
–
5.625
Publisher:
Oscar Publishing Services
Servi
macro-microelements over the genetic horizons of
soils affect the processes of formation of saline soils
and solonchaks. During the formation of humus-
accumulative
horizons,
elements
are
mainly
accumulated in the upper part of the soil profile. In the
process of solonchak formation, macro- and
microelements are redistributed along the soil profile.
In this regard, the study of salt marshes, as well as the
accumulation and redistribution of chemical elements
in salt marshes, is an urgent problem of science and
production.
Object and methods of research: The saline massif-
reserve of the Fergana Experimental Cotton Growing
Station was chosen as the object of research. As for
research methods, Dokuchaevka’s morphogenetic
method was taken as the basis. Agrochemical studies
were carried out by conventional methods. Elemental
analysis was carried out by neutron activation analysis
at the Institute of Nuclear Physics of the Academy of
Sciences of the Republic of Uzbekistan.
Research results: The desert solonchaks studied by us
are characterized as hydromorphic typical alluvial-saz
soils and belong to the group of soils with progressive
salinity. Salt marshes typical of saz are distinguished by
higher degrees of salinity of the entire profile, but a
significant accumulation of salts occurs in the upper
horizons. The salt content in the upper layers varies
within 2-5% of the dry residue. In the underlying
horizons, the amount of salts is 1.3-4.0%.
The surface of these solonchaks is sometimes covered
with a crust 0-3 cm thick. The maximum of salts is
observed in crustal and subcrustal horizons. The
accumulation of water-soluble toxic and non-toxic salts
in the upper 0-3 cm and 3-40 cm layers of the studied
solonchaks reaches 2.7-3.1%. Moreover, the amount of
toxic salts, respectively, in these horizons reaches 1.8-
2.2%.
Quantity and quality of salts, %
R
elea
se
number
De
pth, cm
Na
2
СО
3
С
a(H
C
O
3
)
2
C
aS
O
4
MgS
O
4
Na
2
SO
4
Na
C
l
toxi
c
non
-toxi
c
Tota
l
1
-sa
lt
mar
she
s
0-3
0,017
0,105 0,737
1,406
0,201 0,603 2,227 0,842
3,069
3-40
0,017
0,084 0,768
1,213
0,136 0,438 1,804 0,852
2,656
40-70
0,008
0,089 0,771
1,030
0,146 0,303 1,487 0,860
2,347
70-120
0,008
0,097 0,598
0,849
0,277 0,245 1,379 0,695
2,074
120-160
0,017
0,097 0,677
0,885
0,259 0,247 1,408 0,774
2,82
U.g.w.,
g/l
0,19
1,647 12,40 13,812 2,707 3,406 19,70 14,47 34,170
Volume 02 Issue 11-2022
19
American Journal Of Agriculture And Horticulture Innovations
(ISSN
–
2771-2559)
VOLUME
02
I
SSUE
11
Pages:
17-20
SJIF
I
MPACT
FACTOR
(2021:
5.
705
)
(2022:
5.
705
)
OCLC
–
1290679216
METADATA
IF
–
5.625
Publisher:
Oscar Publishing Services
Servi
The nature of the distribution of salts in the upper part
of the soil profile indicates that in these soils the
process of salt accumulation is replaced by temporary
desalinization. The type of salinity is chloride-sulfate.
According to the mechanical composition, the studied
solonchaks are light and medium loamy.
In this regard, the humus content in the upper 3-40 cm
horizon reaches 0.65%, then there is an intensive
decrease and reaches 0.26%. The ratio of nitrogen to
carbon in these layers ranges from 5.2 to 6.1.
The content of carbonates in solonchaks fluctuates in
the range of 10.2 -15.1%. Soil and groundwater regime
saz.
Establishing the average concentration of cyclic trace
elements in solonchaks is associated with relatively
great difficulties. This is not surprising, because one
should take into account the influence of numerous
factors such as: the concentration of water-soluble
salts, the quantity and quality of toxic salts, the
composition and properties of soil solutions, the
composition and properties of ground and mineralized
waters, etc.
The concentration of a number of cyclic chemical
elements in the solonchaks of Fergana varies in the
upper 0-3 cm layers within the range of 1.7-28500
mg/kg. Microelements are arranged quantitatively: Fe
> Mn > Sr > Zn > Cr > Ni > Co > As > Mo > Sb. A similar
pattern persists in the underlying horizons. At the
same time, as expected, there is a slight increase in the
concentration of iron, manganese, strontium, nickel,
molybdenum at the horizon of soil-soil contact with
groundwater, which is associated with gley barriers.
The presented material testifies to a peculiar regularity
in the distribution of chemical elements in the
solonchak profile. Therefore, along with determining
the amount and average concentration of trace
elements in general, it is necessary to take into account
their ability to concentrate and disperse in the horizons
of the studied solonchaks. For a quantitative
assessment of chemical elements in the lithosphere,
V.I. Vernadsky introduced a special indicator -
concentration clarke (CC), which characterizes the
deviation of the content of a chemical element in a
given object from its clarke.
Based on this, it can be said that strontium gradually
accumulates in the underlying relatively gypsum,
carbonate layers of solonchaks, where its fluctuation in
these horizons varies within 1.56-2.09 CC. There is also
an increase in the CC of zinc in the range of 1.11-1.45,
unfortunately, there is a significant increase in the CC
of arsenic in all horizons of solonchaks in the range of
6.8-8.12 CC, which is obviously associated with the
nearby mercury-antimony halos of the deposit. An
increase in the CC of molybdenum and antimony is also
observed.
The content of other studied elements such as Fe, Mn,
Cr, Ni, Co is below their clarke values, according to
Dobrovolsky, it is not concentrated in solonchaks. The
series of scattering clarks repeat the patterns of
distribution of concentration clarks in reverse order,
that is, the studied elements in the upper 0-3 cm layer
in this regard occupy the following distribution series:
Ni > Mn > Fe > Sr > Co > Cr > Zn > Sb > Mo > As.
Solonchak vegetation is characterized by high ash
content. Their sols are dominated by chlorides, sulfates
of sodium and alkaline earth elements.
CONCLUSION
Thus, in the desert hydromorphic solonchaks of
Central Fergana, a high degree of arsenic accumulation
is observed, CC, which reaches 7-8, and KP ranges from
Volume 02 Issue 11-2022
20
American Journal Of Agriculture And Horticulture Innovations
(ISSN
–
2771-2559)
VOLUME
02
I
SSUE
11
Pages:
17-20
SJIF
I
MPACT
FACTOR
(2021:
5.
705
)
(2022:
5.
705
)
OCLC
–
1290679216
METADATA
IF
–
5.625
Publisher:
Oscar Publishing Services
Servi
0.12-0.16. There is an accumulation of molybdenum and
antimony. Molybdenum and cobalt tend to accumulate
in solonchak plants, the coefficient of biological
absorption of which, respectively, fluctuates in the
range of 1.66-11.31 and 1.12-1.38, the remaining
elements are captured by solonchak plants.
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