Properties Of Gray Forest Soil Research Articles

PLANT COMPOSITION AND SOIL PROPERTIES DURING POSTAGROGENIC EVOLUTION IN THE CIS-BAIKAL FOREST-STEPPE ZONE

Purpose. The purpose of the study was to examine the features of the restoration of plant communities and some properties of gray forest soils, including the humus state, during their post-agrogenic transformation in the conditions of the Cis-Baikal forest-steppe zone.
 Materials and methods. The study was carried out using the post-agrogenic chronosequences, including arable land, abandoned soils of different ages, and natural cenoses (meadow and forest). Traditional methods of phytocenology were applied to study the plant composition. Mixed soil samples from three trenches were collected from the former arable layer of 0–20 cm. The content of organic carbon (Corg), total nitrogen (N), and the C/N ratio, the pH(H2O) and pH(KCL) values, as well as soil density and the reserves of Corg were determined. The statistical processing of data was performed using One Way ANOVA (Sigma Plot from Windows Version 14.0).
 Results. It was shown that plant vegetation being typical for the Baikal forest-steppe zone was recovering after the cessation of plowing. At the same time, the several ruderal species were preserved in the plant composition during a long period. This specific phenomenon could be the cause for inhibition of terminal phytocenoses formation. Along with the change in the vegetation, a significant increase in the organic carbon content was revealed in the soils of chronosequences. At the later stages of post-agrogenic succession the carbon reserves in soil were 1.5 times higher than those in arable soil. The humus content in the soils increased with age of the abandoned lands, but no cardinal changes in its qualitative composition were observed. The data indicated the stable functioning of the system of humus substances in the gray forest soils of the Baikal forest-steppe zone during their post-agrogenic evolution.
 Conclusion. The results can be used for the forecast of post-agrogenic soil changes under various scenarios of land use in conditions of the Baikal region.

The influence of anthropogenic trampling of gray forest soils on their physical properties

Abstract The purpose of the study was to determine quantitative and relative indicators that significantly affect the physical properties of gray forest soils within the park ecological trail, to show changes in the compacted soil during natural recovery. Physical properties were determined in 3-fold repetition with the help of three-dimensional cylinders, followed by the calculation of their density and porosity. Population of physiologically active roots of the upper 0.5-meter layer of gray forest soils was determined by the monolith method in 5-fold repetition. It was found out that under the influence of anthropogenic trampling, the greatest degradation changes of the studied physical indicators are manifested in the upper 10-centimeter layer of gray forest soils. An increase in the density by 32.1–38.0% and solids content of the soil by 14.1–22.8%, as well as a decrease in the volume of pores by 32.0–44.3% was recorded and mass of physiologically active roots of woody plants by 84.6–91.2%. The natural restoration of soil occurs most intensively in the upper 5-cm layer. At the same time, over a 15-year period, the following changes were observed – a decrease in density by 19.5%, the content of solid particles by 9.9%, an increase in the content of pores by 39.1% and physiologically active roots woody plants by 330.0%. Quantitative and relative indicators of their physical properties obtained for anthropogenically compacted gray forest soils explain the changes in the mass of physiologically active roots of deciduous woody plants that grow in the centers with anthropogenically compacted soils.

Microaggregate Composition as a Factor of Variability in the Physical Properties of Gray Forest Soils in Western Siberia

The aim of the study was to study the variability of the microaggregate composition of the soil profile of virgin gray forest soils in the western part of the West Siberian Lowland. 330 soil sections were studied, covering all subtypes of gray forest soils. Empirical data were processed using mathematical methods of variation statistics. The results of the research showed that the humus horizon of light gray forest soils is characterized by good water resistance of microaggregates - the dispersity factor on average for the sample is 14.6%, the variation is small (Cv = 19%). Gray forest soils in the humus horizon have, on average, a dispersity factor of 12.2%. This subtype, in comparison with light gray soils, has a higher variability of the dispersity factor (Cv = 24%), which is due to the variety of combinations of soil formation factors, mainly relief and vegetation. The dispersity factor of the humus horizon of dark gray forest soils averages 7.9% for the sample, which is typical for medium structured soils; the variation is estimated as small (Cv = 18%). The microaggregate composition of gray forest soils is characterized as satisfactory throughout the entire soil profile, which makes it possible to improve structure formation during agricultural development and maintain the optimal structural-aggregate composition for a long time. The results obtained can be used in the development of an adaptive-landscape system of agriculture.

Dependence of Soybean Yield on General Physical Properties of Gray Forest Soil

Dependence of Soybean Yield on General Physical Properties of Gray Forest Soil

Вплив екологізованих систем удобрення на родючість сірого лісового ґрунту та врожайність пшениці озимої

Goal. To study the influence of ecological fertilizer systems (EFS) on physicochemical, agrochemical, and biochemical indicators of gray forest soil’s fertility and winter wheat yield. Methods. Field — to determine the impact of EFS on the physicochemical, agrochemical, and biochemical properties of gray forest soil; laboratory — to establish quantitative and qualitative characteristics of the soil environment; comparative — to compare the yield levels of winter wheat; mathematical-statistical — to substantiate the probability of results. Results. Peculiarities of formation of physicochemical parameters of soil under the conditions of EFS are generalized. Against the background of pea straw (block I) EFS contributed to the alkalization of the soil (pH (KCl)) by 0.25–0.29 units relative to control, which significantly increased the content of Ca2+ and Mg2+ — by 12–32%, relative to control. N60P90K90 fertilizer systems (block II) with the addition of humus fertilizer (HF) or manure aftereffects reduced the negative effect of soil acidification caused by the use of N60P90K90 and contributed to the stabilization of Ca2+ and Mg2+ content in it. EFS with the addition of HF on the background of straw or under the conditions of N60P90K90 application on the background of manure aftereffect significantly improved the nutrient regime, increased the content of a mobile and water-soluble organic matter, and increased decomposition of linen fabric by 37–49% compared to control. The use of EFS based on pea straw ensured the yield of winter wheat at the level of 3.96–4.28 t/ha. In the conditions of EFS with the use of N60P90K90 on the background of manure aftereffect or in combination with HF, the yield of winter wheat was in the range of 5.31–5.42 t/ha. Conclusions. Under the conditions of growing winter wheat on gray forest soil, fertility rates have significantly improved and crop yields have increased, especially in the case of EFS application: HF on pea straw + N30P45K45 + biostimulator, and N60R90K90 + BS on manure aftereffect.

Agroecological assessment of the effectiveness of different systems of soil protection measures in the reproduction of fertility of slope gray forest soils

The increasing anthropogenic impact on the slopes, the involvement of new slope lands in the production sphere require reliable substantiation of their erosion resistance. The study of the effectiveness of the influence of the contour-band organization of the territory and various doses of fertilizers on the intensity of rain and snowmelt runoff, the composition and properties of flat gray forest soils was the main goal of our study. The object of the study was a plot of gray forest middle loamy soils located on the slopes of the western exposure, in 12 soil sections. The article presents a study of the influence of the contour-band structure of plots using cattle droppings and top dressing on the fertile properties of gray forest soils. We used standard research methods to determine the amount of humus and determine the aggregate properties of the soil, as well as to determine the properties of the solid phase of the soil density. We established the level of impact of the forest belt organized in the study area, while taking into account that we applied top dressing on the study area, which affects the nominal influence of factors that led to an increase in the environmental stability of the studied soils. It is proved that runoff-regulating contour forest belts provide optimization of density and increase in soil porosity, improve water-air regime, activate living organisms of agrobiocenosis, increase the thickness of the humus layer, content and reserves of humus in the soil up to 3,6% and 130,7 t/ha depending on its location on the slope. It is established that the use of fertilizers as top dressing on the studied destroyed soils significantly increases the yield of plant crops, as well as increases their environmental sustainability. The study of slopes from the standpoint of assessing, analyzing, and predicting their erosion resistance is an important direction of soil protection agriculture and in solving the food insecurity in Russia. Due to the intensive reduction of the area of agricultural land, the decrease in soil fertility, the problem of anti-erosion protection of land requires an immediate solution.

Оптимізація живлення сільськогосподарських культур за фізико-хімічної деградації кислих ґрунтів

Goal. To study and to identify features of optimization of crop nutrition during physicochemical degradation of acid soils. Methods. Field, laboratory, computational, mathematical, and statistical. Results. Results are given of researches in the influence of agrochemical load on gray forest soil with increasing doses of fertilizers (in combination with measures of radical chemical reclamation and without them) received during 2016–2019. It is established that the use of intensive fertilizer systems without radical chemical reclamation leads to the deterioration of the physicochemical properties of gray forest soil. On the background of reducing the aftereffects of radical chemical reclamation for 10–13 years, the annual application of a dose of alkaline earth elements, taking into account the physiological characteristics of the culture (average 11.4 and 4.6 kg/ha of calcium and magnesium, respectively) ensures for 10–12 years close to neutral reaction, and on the 13th year of application — the slightly acidic reaction of the soil solution. Besides, the content of exchangeable Ca and Mg in GVK increases slightly, it increases to 6.71–7.00 mg·eq/100 g of soil. Conclusions. The use of a dose of mineral fertilizers on gray forest soil, which is calculated according to the species genotypic ratio (SGR) of elements in the biomass of the culture on the background of application of lime, optimizes crop nutrition, physicochemical properties of the soil, reduces the dose of phosphorus and potassium and toxic action of H+ and Al3+. The optimal combination of N, P, K, Ca and Mg (216 kg/ha in the ratio of 1:0.4:0.5:0.3:0.1) in combination with seed inoculation with nitrogen-fixing and phosphorus-mobilizing bacteria provides an increase of productivity of the grain crop rotation to 5.45 t/ha g.p., and payback of 1 kg act. mat. of fertilizer applied to 15.6 kg g.p. Physicochemical degradation of acid soils at the application of high doses of nitrogen fertilizers can be partially prevented by saturation of the soil absorption complex with exchange cations of alkaline earth metals, supplementing the fertilization system with small doses of Ca and Mg, which are calculated according to the recommended dose of nitrogen, limited on acidic soils.

Dynamics of agrochemical properties of gray forest soil of the Western Siberia’s sub-boreal zone affected by a long-term agricultural exploitation

We studied the changes in the agrochemical properties of the gray forest soil in the territory of Western Siberia’s sub-boreal zone affected by the long-term use of the organomineral fertilizers in the grain-follow-row crop rotation and in its absence. We used virgin areas of gray forest soil situated in the immediate proximity to the fields as a control. The anthropogenic changes of morphological features throughout the gray forest soil profile were identified based on the use of fixed permanent plots laid down in 1960. This paper describes the dynamics of the actual, exchange, and hydrolytic acidity as well as the amount of absorbed bases, together with the base exchange capacity and the degree of base saturation. The study of arable gray forest soil for the period 1960-2020 was performed. This provided an opportunity to identify the causes of its chemical degradation in the sub-boreal zone of the Trans-Urals under the conditions of a plant residue shortage. The systematic use of mineral fertilizers affects the base exchange capacity and triggers an increase in the arable layer’s acidity. The use of an organic fertilizer system stabilizes the chemical properties of gray forest soil.

Resource-Saving Technology Based on Sewage Sludge

The issues of waste disposal are currently having a global technological and economic complexity. The severity of the environmental problem is specified by the accumulation of large volumes of various wastes, including sewage sludge (SS). Modern technologies can provide its disposal with environmental and economic benefits. SS is a rich source of nutrients with a high fertilization potential. This work aims to study the utilization of wastewater sludge in recycling technology for agriculture. The composition of urban sewage sludge and its impact on the properties of gray forest soil were studied. It was shown that its application in a dose of 40-60 t/ha promoted an increase in the content of humus, mobile phosphorus and exchangeable potassium in the soil and a decrease in acidity. The noted increase in the content of the studied heavy metals upon the introduction of various doses of sludge did not exceed the approximate permissible concentration (APC) in the soil. The results showed that the use of SS as a fertilizer restores the balance of organic matter in soils and improves their agroecological properties. This technology, as a safe way of recycling waste into a valuable complex fertilizer, contributes to resource conservation.

Influence of forage crop rotations on crop yields and phytosanitary conditions of soils in the Baikal region

The article considers the practical aspects of ensuring the preservation of natural ecosystems based on the use of organic farming technologies. It presents the results of research in the forest-steppe zone of the Baikal region for 2011-2018. On the basis of the phytosanitary state of crops studying analysis, it was found that the correct alternation of crops in crop rotation suppresses the level of weeds, thereby not affecting the productivity of agricultural crops. The paper reveals the characteristics of agrophysical and water properties of gray forest soil, the influence of forage crop rotations with meadow clover on the yield of cultivated crops. According to the research results, the authors found that overseeding of legumes in the fields of forage crop rotations increases the average productivity by 16.6% in comparison with the control option. The influence of the aftereffect of perennial legumes in crop rotations increases the yield of grain fodder and silage crops by 20-31.8%. The crop rotation with two fields of meadow clover (crop rotation No. 3) was determined to be the best for all indicators.

Influence of fertilization and chemical recruitment systems on the structure of the garmental complex of gray forest soil

One of the most common soils in Ukraine is soilsof forest origin. These soils are a valuable agriculturalfund, the rational use of which is impossible withouta detailed study of their pedogenesis, physicochemical and other properties in general. These soils were formed under the conditions of the washing water regime and are marked by the acid reaction of the soil solution. The latter contributes to the leaching of bases from the humus-eluvial horizon, which changes the ionic balance in the soil solution and reduces the degree of saturation of the soil absorption complex, which is a set of mineral, organic and organo-mineral components of solid soil capable of iona. The absorptive capacity of soils is one of the most important functions, as it is directly involved in the processes of soil formation and the formation of their fertility. Studies conducted in a long-term field experiment established in 1992 on gray forest soil to determine agrogenic factors, namely — long-term use of various fertilizer systems (mineral green manure and plant by-products and organo-mineral system) and liming, showed changes in the structure of exchange cations the soil-absorbing complex (GVK) and physicochemical properties of the studied soil under conditions ofits intensive use as «arable land» in order to increaseits effective fertility. For a more objective assessment of the above factors for changes in the absorption complex of the soil, the obtained results were compared not only with absolute control, but also tied to the initial state, i.e. the soil of the virgin area located near the experimental field. Against the background of research, it was found that fertilizer systems have different effects on the content of exchange bases in GVK and their ratio, the amount of exchange cations, the absorption capacity of cations and the degree of soil saturation with bases. Liming of acid soils for a long time reduces acidity and improves the complex of properties that affect thelevel of fertility. The application of ameliorant givesa noticeable (on sod-podzolic soil) or significant (onchernozem) increase in yield. The use of mineral fertilizers on calcareous soils has a much greater effect. The positive influence of chemical ameliorants on physicochemical properties of gray forest soil is noted. The content of calcium and magnesium exchange in the soil absorption complex increases, the ratio between them improves, and the absorption content increases.

The effect ofslotting between rowson hop yield and on thegeneral physical characteristics of the soil

In the conditions of the Chuvash Republic, the effect of slottingbetween rowson hop yield and on the water-physical properties of gray forest soil was studied. Soil slotting was used during 2017-2019 in autumn after the completion of harvesting operations (late September-early October) on hop plantations of the Podvyazny variety. Tillage with a SCHX-1.6slotting device (Czech Republic) was carried out to the depth of 50 and 65 cm at different time intervals (annually and three years later). As the control, there was taken the conventional tillage without the use of aparaplow combined with autumn tillage of row spacing to a depth of 20 cm. Studies have shown that the use of aparaplow to a depth of 50 and 65 cm improved the aeration and water permeability of the soil (the specific weight of the 20-25 cm soil layer decreased by 0.1-0.2 g/cm3, the volume weight of the same layer-by 0.1-0.3 g/cm3) and contributed to an increase in hop yield by 1.4-3.1centners per hectare (LSD05 =1.3 centners/ha) compared to the conventional tillage of row spacing (20.9 centners/ha). The content of alpha-acids in hop cones was not affected by slotting between the rows of hops. The specific weight of the 50-55 cm soil layer significantly decreased in all variants in comparison with the control. The highest moisture content of the deep layers of the soil (30-55 cm) was achieved with conventional tillage combined with annual autumn slotting to 50 cm depth. All the studied variants in comparison with the control give a significant increase in the yield of hop cones. For the production, the variant with the lowest costs for deep tillage should be recommended. It is the annual processing of the top soil layer combined with the autumn slotting every 3 years to 50 cm depth.

Acid properties of gray forest soils depending on fertilization systems and long-term consequences of chemical amelioration

Acid properties of gray forest soils depending on fertilization systems and long-term consequences of chemical amelioration

Agrophysical and physico-chemical properties of grey forest soil for the influence of different types of fertilizers and chemical reclamation.

The article presents results of research of the agrophysical and physico-chemical properties of gray forest coarse-dust light-loam soil. The influence of liming and systematic use of mineral fertilizers of by-products and the aftereffect of siderate, both separately and in various combinations on the density of the composition and structure of absorbing complex of the arable and subsoils of the soil, is shown. The density of the soil compilation in the studied areas varied in the range - 1.28 - 1.53 kg / cm3.
 There was also a negative effect on the introduction of physiologically acidic mineral fertilizers, on the physical properties of the arable and subsoil layer. The introduction of CaCO3 has changed the structure of exchange cations at soil absorbing complex and led to the improvement of physical properties of the soil. Positive effects were detected by the use of complex chemical melioration, together with N50P30K55, by-products and aftereffects of siderate.

Формування структурно-агрегатного складу та водно-фізичних властивостей сірого лісового ґрунту залежно від мінеральних добрив і тривалої дії вапна

The article presents the research data of structural-aggregate composition, water-physical constants and density of compilation gray forest coarse-dust–light-loam soil for the systematic use of mineral fertilizers and long-term action (8 th - 10 th year) of chemical melioration. The influence of the long action of a single dose of lime on hydrolytic acidity on the transformation parameters of soil properties was established. The presented results of the use CaCO 3 (1,0 Hг), testify to an increase in the quantities of agronomically valuable part of the soil in 3.5 %. At the same time, the volume of adsorbed water by the soil increased and keeping it in the capillary and general space. The shown influence of the systematic use of physiologically acidic mineral fertilizers on the agrophysical and water-physical properties of gray forest soil. Adding N 50 P 30 K 55 led to increased content of dust fraction of soil and reduce its filtration capacity, which is bad for the soil properties. The use of a single and a double dose of mineral fertilizers intensified the peptization of soil aggregates. Due to this, increased the amount of finely-dispersed parts, which is sedimented and accumulated in the lower layers of the soil. As a result, the filtration ability of the soil and absorbing its properties deteriorated, and the density of the composition during vegetation increased.

Soil Tillage as a Factor of Soil Conservation

The work describes the question of the soil treatment system influence on agro-physical and microbiological properties of gray forest soils, and yield of barley in Western Siberia. Research works were carried out in 2013-2014 in Yaya region of the Kemerovo region. Tillage affects soil structure. The water stability in zero tillage conditions was poor (15.7%). Soil density corresponding to the optimum rate for barley is formed by the zonal processing system, while at the zero tillage soil remains solid. The best indicators of phosphataze, catalysis and amylase activity are formed with minimum processing system. In the experiment the highest yield of barley was obtained with minimum tillage - 12.1 c/ha.

Changes in physical properties and carbon stocks of gray forest soils in the southern part of Moscow region during postagrogenic evolution

Changes in carbon stocks and physical properties of gray forest soils during their postagrogenic evolution have been studied in the succession chronosequence comprising an arable, lands abandoned 6, 15, and 30 years ago; and a secondary deciduous forest (Experimental Field Station of the Institute of Physicochemical and Biological Problems of Soil Science, Russian Academy of Sciences, Pushchino, Moscow region). It is found that carbon stocks in the upper 60-cm soil layer gain with increasing period of abandonment, from 6.17 kg C/m2 on the arable land to 8.81 kg C/m2 in the forest soil, which represents the final stage of postagrogenic succession. The most intensive carbon accumulation occurs in the upper layer of the former plow (0- to 10-cm) horizon. It is shown that the self-restoration of gray forest soils is accompanied by a reliable decrease of bulk density in the upper 10-cm layer from 1.31 ± 0.01 g/cm3 on the arable to 0.97 ± 0.02 g/cm3 in the forest. In the former plow horizon of the arable–abandoned land–forest succession series, the portion of macroaggregates increases from 73.6 to 88.5%; the mean weighted diameter of aggregates, by 1.6 times; and the coefficient of aggregation, by 3.8 times. Thus, the removal of lands from agricultural use results in a gradual restoration of their natural structure, improvement of soil agronomical properties, and carbon sequestration in the upper part of the soil profile.

Агрогенная и постагрогенная трансформация почв Льговского района Курской области

In this work we consider the processes of degradation and changes of properties of gray forest soils and migration-mycellar chernozems as a result of agrogenesis and erosion. We also consider progradation processes, which lead to forming of anthropogenic deeply transformed soils, and post-agrogenic processes, which are characterized by reclamation of the natural parameters of soils. The most dramatic changes occur in the composition of profiles, and also in morphological, physical and agrochemical properties. The results of investigations allowed us to determine four trends of the development: agrogenically-degradational and also agrogenically progradational, which is familiar for large areas of arable lands, and also postagrogenic nature-like, which is typical for laylands. The most of the soils, involved in agricultural activivities, are affected by degradation as a result of agrogenesis. This is manifested in the developments of processes of surface and linear erosion, in the decrease of humus content and the thickness of humus layer of the soil mass. There are also observed such processes as forming of compaction under the arable layer, the changes in structure and the decrease of water resistance of aggregates. In the agro-gray soils of agrogenically-degradational trend we observe the significant decrease of the thickness arable layer and humus content, and as contrary, the increase of silt and physical clay content, and also the increase of solidity values in comparison to the gray soils. In the same agrogray soils of agrogenically-erosional trend, we observed the increased density and solidity, the increase of non-agregated material content, the decrease of humus content, the decrease of melkozem content and the decrease of fine fraction content, which are valuable for plants. The results obtained are the additional information base for the convertion of Uniformed State Register of the soil resources of Russia on a regional and local level.

Changes in the physicochemical properties of gray forest soils in the Opol’e region under the long-term application of fertilizers

Models of changes in the acid properties of gray forest soils of the Opol’e region have been developed. It is shown that soil acidity increases at the application of phosphorus—potassium fertilizers and with increasing rates of the complete fertilizer. Organic fertilizers suppress the increase of soil acidity. The changes in the acid properties of these soils reflect the interaction of fertilizers with humus.

Numerical methods to recognize the soil types in the forest steppe

The authors generalized and summarized original and literature data with the view of studying the gray and dark-gray soils in the Volga-Kama forest steppe. The methods of multidimensional statistics permitted to determine the position of these soils in the available soil classification system. A great number of soils described by different researchers within the framework of Russian soil classification system (1977) were formalized in conformity with that published in 2004. In the latest classification system of soils in Russia the reliable differences in the humus horizon of gray and dark-gray soils are shown in the content of humus, exchangeable bases, clay fraction, acidity and thickness as well as in the thickness of the leached layer (up to the C horizon) and the humus storage within the one meter of soil (t/ha). The methods of numerical classification allowed determining discriminated functions and classify more exactly the studied soils in the Volga-Kama forest steppe. Based upon statistic processing of the obtained data the limits for properties of the humus horizon are suggested to distinguish the gray and dark-gray soils. The visual imagination widely adopted now to recognize the types of gray and dark-gray soils should be added by limits of their varying properties. The obtained results presented in this paper may be useful to improve the idea on properties of gray forest soils. The suggested criteria to recognize the studied soils may be applicable for studying and systematizing these soils as well as for purposes of land use, elaboration of regional database and in projects of ecological territory optimization.