Name
Sheudghen Askhad Hazretovich
Scholastic degree
•
Academic rank
professor
Honorary rank
—
Organization, job position
Kuban State Agrarian University
Web site url
—
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Articles count: 30
In the soils of rice fields, eluvial gley processes
develop, which are manifested in redistribution of silty
particles along the profile, water-soluble humus,
mobile compounds of iron and phosphorus. Most
intensively, these processes are developed in meadowbog
soils, confined to closed depressions of the plains
plain. Meadow-black soils lying on elevated relief
elements have more favorable physical, physicochemical
and oxidation-reduction properties for
cultivating rice and accompanying crops in crop
rotation. The highest yield of rice is formed on high
checks and higher at 12,4 c/ha than on low ones
In the soils of rice fields, eluvial gley processes
develop, which are manifested in redistribution of silty
particles along the profile, water-soluble humus,
mobile compounds of iron and phosphorus. Most
intensively, these processes are developed in meadowbog
soils, confined to closed depressions of the plains
plain. Meadow-black soils lying on elevated relief
elements have more favorable physical, physicochemical
and oxidation-reduction properties for
cultivating rice and accompanying crops in crop
rotation. The highest yield of rice is formed on high
checks and higher at 12,4 c/ha than on low ones
The article presents results of studying the total content and the forms of Nickel in the Western Caucasus leached Chernozem at three rotations of 11-fild grain-grass-arable crop rotation. The Nickel content in the soil is close to its Clark (40 mg/kg) and significantly lower than UEC (80 mg/kg). Scientifically based system for fertilizing crop rotation does not lead to the accumulation of Nickel in the soil, but creates the conditions for increasing its mobility. In the future, we may experience the need of the inclusion of Nickel into the system of fertilization of crops grown on leached Chernozem. The Nickel content in the leached Chernozem before development of crop rotation was generally close to Clark soils of the world (40 mg/kg) and significantly lower than UEC (80 mg/kg), which favors the production of high quality produce. After three rotations of the crop rotation without using fertilizers, the total content of Nickel and acid-insoluble form in the soil decreased slightly, but the number of the element extracted with both buffer and acid extractor, increased insignificantly. The decrease of the total content of Nickel and its reserve (acid-insoluble) fund in the soil we explain with the annual exclusion of the element with harvests crops from the fields, and the trend of increasing mobile and acid-soluble - mineralization of humus followed by acidification of the soil. Systematic mineral fertilization on field crop rotation was slightly up for the Nickel fund of the soil, but did not ensure the recovery of the initial level. At the same time, at fertilize crop rotation we observed a clear trend of increasing the number of rolling and acid-soluble Nickel. If we consider that the value of the MPC for moving Nickel is equal to 6 mg/kg, these changes may not have any negative environmental impacts, but rather will encourage the use of this ultra-microelement by plants
The article presents the results of the study on the magnesium mode of leached chernozem of Western Ciscaucasia at three rotation of grain-grass-tilled crop rotation. Magnesium in the soil is represented mainly by non-exchangeable form, the number of which is estimated at 90,18 and 91,29 % of gross reserves. Exchange forms of magnesium are 8,68 and 7,71 % respectively in arable and the subsurface layer. The share of water-soluble and organic forms account for less than 1 % - of 0.62 and 0.68 and 0.46 and 0.38% respectively. For three rotation 11-full rotation of gross stocks of magnesium in the soil in which crops were grown without fertilizers has decreased by 0.02 % (200 mg/kg), with fertilizers of 0.03 and 0.02 % (300 and 200 mg/kg). Intense magnesium has been leached from the topsoil. There was a change of the soil content of the forms of magnesium. In the rotation without fertilizer, the share of non-exchangeable magnesium in the General Fund item increased from baseline by 0.27 % in arable and 0.11% of the subsurface layer of soil that the absolute content decreased. The amount of water-soluble, exchangeable and organic magnesium of the soil decreased. Reducing the amount of water-soluble (0.05 and 0.06 %) and metabolic (0.18 and 0.02 %) of magnesium was due to its consumption of the plants. The proportion of magnesium organic part of the soil is reduced as a result of steadily declining yields, and, therefore, the amount of organic residues. In crop rotation, use of mineral fertilizers we have observed different behavior of magnesium compounds in the soil. The number of non-exchangeable magnesium decreased from baseline by 0.13 % in arable and 0,58 % of the subsurface layer of soil. The content of the exchange of magnesium increased respectively 0.43 and 0.41 %, water soluble - 0.13 and 0.10 %, and the organic part of the soil - 0.02 and 0.02 %
The article presents results of the studies that
obtained because of the long-term experience of the
Department of Agricultural Chemistry of Kuban
State Agrarian University. We have found the
optimal dose of micronutrients at different levels of
mineral nutrition, to achieve maximum yield of
green mass of alfalfa quality. We have calculated the
dynamics of the accumulation of nutrients in plants
throughout the growing season
The contents of lead in soils are primarily determined by regional factors: the composition of parent rocks, relief, climate, vegetation. In recent years, these factors have increased the anthropogenic source of element. In order to assess its impact, requires knowledge of the natural, i.e., background lead levels, the so-called reference points, which can later be used to monitor changes occurring in the soil. Under background refers to the content of the element in soils at a great distance from the areas of receipt of contamination. Background content of lead in each type of soil depends mainly on composition of parent rocks. The correlation coefficient between the content of lead in parent rocks and soils, with the background contents is equal to 0,86±0,17 at p=0,95. For each soil type there are low variations in lead content due to the composition of parent rocks. Lead concentrations in the soils increased at the expense of its receipt from the atmosphere, irrigation water, drainage during mining, as a result of agricultural use, lead containing chemicals. Comparing the obtained results with existing currently permissible concentrations (APC, MPC) it is necessary to note that the lead content in leached chernozem soil after three rotations of the rotation may not cause any pathological changes or anomalies in the course of biological processes and lead to accumulation in the agricultural plants, and therefore may interfere with biological optimum
The article presents results of studying total content
of titanium in both not fertilized and systematically
fertilized black leached soil. Science-based system of
fertilizer crop rotation allows solving problems of
sufficient balance of nutrients in the system of "soilplant-fertilizer",
increasing the quantity and
improving the quality of the crop. At the same time,
their application is active influence on the natural
environment. In the soil, there is an input of a large
set of chemical elements come along with fertilizers.
In addition, due to their physiological pH or
alkalinity, fertilizers are capable to affect the physical
and chemical properties of the soil. The use of
mineral fertilizers in scientifically based doses on the
fields of crop rotation for 33 years virtually has no
impact on the content of titanium in leached
Chernozem. In the arable layer its number increased
only by 2.1 %, and in subsurface - it is the same as in
the crop without fertilizer. Enrichment of topsoil with
titanium is due to desilication of rocks during
weathering. Due to the low solubility of titanium
minerals, they remain in the place longer, and
therefore, the content of the element in the soil
increases. As you know, fertilizers applied to the
fields of crop rotation, increase the intensity of the
biological cycle of substances and thereby enhance
the process of destruction of the parent rocks
Over the past 15 years due to removal with crops of
rice crop rotation, as well as with field waste and
seepage water content of mobile forms of boron in
soils of rice irrigation systems in the Krasnodar region
decreased by 10 %, cobalt by 14 %, manganese
by 10 %, copper by 7 %, molybdenum by 15 % zinc
by 6 %. Impoverishment of soil with calcium and
sulfur is observable. Need of using micronutrients for
this crop is also determined by lowering mobility of
most microelements in flooded soils. Partly this problem
can be solved by use of neutralized phosphogypsum
– waste product of wet-process phosphoric acid.
With its application in dose of 1 t/ha, field receives
265 kg of Ca, 215 kg of S (general) 20 kg of P2O5
and 9.8 kg of SiO2, so it compensates for the loss of
calcium from the rice soil, as well as solves the problem
of sulfur, silicon and partly phosphorus fertilizers.
Data showing possibility of use of neutralized
phosphogypsum as multicomponent fertilizer for rice
crops are given. Phosphogypsum reduces sparseness
of rice plants in ontogeny, thus forming a dense agrocenosis:
plant density is 24-25 pcs./m2 that is higher
than on application of N120P80K60. Plants with such
agricultural background by their height and leaf area
did not differ from control ones (N120P80K60), and
their dry weight was higher by 2-6 %. With fertilizer
system N120P80K60 application of 4 t/ha of phosphogypsum
during main fertilizer treatment provides
the same level of phosphorus content in the soil and
plants, as application of 100 kg/ha of ammophos.
Rice yield increases by 0,57 t/ha or 8,98 %. Yield
growth is the result of increasing survival capacity of
plants, seed setting of panicle and weight of grain per
plant
The article shows a possibility of using neutralized
phosphogypsum as multicomponent fertilizer for rice
crops. In the system of rice fertilization replace of
150kg/ha of ammophos during main application with
40 kg/ha of carbamide and 4 tons/ha of phosphogypsum
applied in spring provides the same content of
available forms of nitrogen, phosphorus and potassium
in soil and plants as with application of
N120P80K60. Application of phosphogypsum in spring
before sowing is less effective than application in
autumn before plowing. When applicating phosphogypsum
in spring 2013 with a rate of 4 t / ha the
obtained yield was 0.57 t / ha or 8.98% higher than in
the control, and in 2014 it was not different from that
obtained with the application of solid mineral fertilizers
with a rate of N120P80K60. With autumn application
of phosphogypsum increase in yield in 2014 was
0.98 t / ha or 12.6%. Yield growth is the result of
increasing the survival of plants, grain content in
panicle and grain weight per plant. Use of neutralized
phosphogypsum is economically feasible. Relative
benefits of using phosphogypsum instead of phosphorus
fertilizer (ammonium phosphate) on rice
crops in the Federal State Unitary Enterprise SRSF
"Krasnoarmeyskiy" named after A.I.Maystrenko,
Krasnoarmeyskiy district of Krasnodar region at the
optimal rate amounted to 13139.7 rubles per 1 ha