Effect Of Mineral Fertilization Research Articles

Effect of mineral fertilizers on the taste qualities of apple varieties

This article presents the results of a 3-year research study into the effect of soil and foliar application of nitrogen and potassium fertilizers on the taste qualities of the Veniaminovskoe (Rvi6) and Sinap Orlovskii (3×) apple varieties bred at the Russian Research Institute of Fruit Crop Breeding (VNIISPK). The assumption that varietal features are the most important factor that determines taste was confirmed. In addition, the influence of weather conditions of the growing season on the chemical composition of fruits was observed. Thus, the year of 2019 was characterized by the most favorable weather conditions of the growing season. In August, during fruit ripening, the optimum temperature and humidity regime had a positive effect on the accumulation of soluble solids, sugars, and titratable acids in both varieties under study. However, the varieties responded differently to the same doses of mineral fertilizers. The application of fertilizers had no significant impact on the content of the studied components and the sugar-acid ratio in Veniaminovskoe fruits. Conversely, Sinap Orlovsky was found to be responsive to this agricultural practice. In 2019, the joint application of triple foliar and soil fertilizing using N30K40, N60K80, and N90K120 in various doses had a positive effect on the reduction of titratable acidity in fruits of this variety. As a result, the sugar-acid ratio increased by 1.3–1.9 times. Over the entire study period (2017–2019), a significant decrease in the content of sugars in Sinap Orlovsky fruits was observed in the variant with additional foliar fertilizing compared to the control. During the study period, the high doses of N90K120 nitrogen and potassium fertilizers along with foliar application contributed to a significant increase in the sugar-acid ratio in Sinap Orlovsky fruits, which significantly exceeded the control.

Effect of mineral fertilizers, forecrops and soil-climatic conditions on millet productivity in steppe zone of the Southern Urals

The research was carried out on southern chernozems in arid conditions of the Orenburg Urals in 2002-2021. The influence of agrometeorological conditions of the growing season, spring reserves of soil moisture and nutrients, cellulolytic activity of microorganisms, content of organic matter, humus and acidity in the soil after applying mineral fertilizers on increasing productivity of millet (Panicum miliaceum L.) cv. Orenburg 9 were studied. The soil and millet crops were selected as the object of research. The work uses field, thermastatic-weight, ionometric, Machigin, application-weight, Tyurin, dispersion and statistical methods of research. Field experiments were performed in four-field, two-field crop rotations and continuous cropping according to the following scheme: 1) Sowing after durum wheat in the aftereffect of black fallow (control); 2) Sowing after common wheat in the aftereffect of black fallow; 3) Sowing after common wheat in the aftereffect of soil-protective fallow; 4) Sowing after common wheat in the aftereffect of sideral fallow; 5) Sowing after durum wheat; 6) Millet continuous cropping. It was revealed that the studied factors in the experiment increased millet productivity under two-field crop rotation with durum wheat after fertilizers application. Compared to the control, the maximum increase of grain yield was after using ammophos complex fertilizer (N40P40) - by 0.45 tons; feed units - 0.44; energy units - 0.26 and feed protein units - 0.24 t/ha. The best effect on increasing productivity was provided by: July precipitation - 28.05 %, spring reserves of productive moisture in 0-30 cm soil layer -- 25.96 %; in 0-100 cm - 20.86 %, nitrate content - 71.80 %, phosphorus - 38.05 %, potassium - 33.07 %, microbial activity (cellulose decomposition) - 62.32 % (p 0.05) compared to the control. The highest organic matter content (17.6 %) and humus (3.5 %) in soil and neutral acidity (pH = 7.0) create favorable conditions for growing millet after durum wheat. As a result of research on other crops, it was found that these factors do not affect yield increase. Positive results of the influence of factors can be useful in increasing millet productivity.

Effect of Inorganic Fertilizers on the Clover Growth in Gray-Brown Soils

The presented article presents materials on the effect of mineral fertilizers on the height of clover on irrigated gray-brown soils of the Ganja-Gazakh region. Due to the biological nitrogen collected by clover in the soil, more than twice the annual rate of nitrogen is saved in one cycle, thereby supplying other agricultural fields with nitrogen. Therefore, given the role of cotton as a strategically important plant, and alfalfa as a strong feed for livestock and restoration of soil fertility, the study of the fertilizer system of both plants in the cotton-alfalfa crop rotation is one of the most urgent tasks. The application of mineral fertilizers to alfalfa plants on irrigated gray-brown (chestnut) soils had a significant impact on alfalfa growth. High altitude means high yield. During the years of research, the highest height was observed in the N60P90K60 variant on average over 3 years. Depending on the norms of mineral fertilizers, the height of alfalfa increased by 6.3-29.5 cm compared to the variant without fertilizers.

Study of the Long-Term Effect of Mineral Fertilizers in a Stationary Experiment in the Steppe Volga Region

The analysis of the results obtained over 48 years in a long stationary experiment with fertilizers, which is located in the Saratov region (Russia) on the southern heavy loam chernozem, is presented. The influence of various types and doses of mineral fertilizers on the productivity of 6-field crop rotation, yield and grain quality of cultivated crops (winter and spring wheat, millet, barley, oats) has been studied. The optimal doses of fertilizers for the arid steppe of the Volga region have been identified, providing maximum yield increases and the greatest payback of 1 kg of mineral fertilizers. The influence of the conditions of humidification of the growing season on the yield of grain crops, the accumulation of protein in the grain and the removal of nutrients from the soil is shown. The scales of carbon losses, gross nitrogen and phosphorus reserves have been established both in untreated soil and with the systematic application of various doses of mineral fertilizers over 48 years of observations.

A study of the effect of mineral fertilizers as a factor in improving environmental safety and productivity of crop rotation

The crop rotation productivity depends on the crops and chemicals used, especially fertilizers. Cultivation of crops makes it possible to obtain environmentally safe products due to biologically correctly selected predecessors and with the correct alternation of crops in space and time. This allows for savings in plant protection products and differentiated use of fertilizers. Based on the results of 28-year research into the yield and productivity of crop rotation with the use of various doses of fertilizers, the regularities of changes in the content of mobile phosphorus and exchangeable potassium in the soddy-podzolic medium loamy soil of Vologda Oblast were revealed, and regression models that reflect their relationship with the productivity of crop rotation were built. The results made it possible to build a non-linear regression model that reflects quantitative features of the dependence of crop rotation productivity on the levels of mobile phosphorus and exchangeable potassium. With an increase in the content of mobile elements in the soil in the case of mobile phosphorus, the productivity of crop rotation will increase with a slight slowdown with each single dose, and in the case of exchangeable potassium it will increase evenly.

The Effect of Fertilization on the Structure of the Aboveground Biomass of Several Cultivars of Jerusalem Artichoke (Helianthus tuberosus L.)

JA (Jerusalem artichoke) cultivars react differently to mineral fertilization. Hence, the aim of this study was to assess the effect of mineral fertilization on the yield and yield structure of this species in terms of its aboveground biomass. The research was based on a field experiment carried out in 2016–2018 in Central and Eastern Poland using the randomized subblock method, in a split-split-plot-dependent system. The factors of the first-order experiment were the cultivars of Jerusalem artichoke (JA) (‘Albik’, ‘Rubik’ and ‘Violet de Renes’), while the second-order factors were differentiated mineral fertilizers (N0P0K0 as a control object and P43, K124, N100, P43K124, N50P43K124m N100P43K124, and N150P43K124) converted to their elemental forms compared with the full dose of manure. The third-order factors were nitrogen forms, including ammonium nitrate and amide. The aboveground biomass yield and its structure were determined. The tested cultivars did not differ significantly in yield, but had different yield structures. The use of mineral fertilization brought measurable effects in the form of an increase in the yield of aboveground biomass. The ‘Albik’ cultivar responded best to mineral fertilization, with the highest yield of aboveground biomass being obtained after applying 150 kg N ha−1 in the form of ammonium nitrate against the background of constant phosphorus–potassium fertilization. The ‘Rubik’ cultivar responded most favorably to the addition of 50 kg N ha−1 in the amide form against the background of phosphorus–potassium fertilization, while the ‘Violet de Renes’ cultivar produced the highest yield of aboveground biomass after the application of 100 kg N ha−1 in the amide form, including PK fertilization. It was found that it was advantageous to use a combination of nitrogen and phosphorus–potassium fertilization.

Comparative effects of mineral fertilizer and digestate on growth, antioxidant system, and physiology of lettuce under salt stress

Salt stress in plants presents a major challenge to future agricultural production. Digestate has various effects on plant growth, but little information is available on its effects on the antioxidant system and physiological characteristics of lettuce under salt stress. In this study, the impacts of mineral fertilizer and digestate application on edible parts of lettuce were compared under three salinities. Experimental treatments comprised application of two types of fertilizer (mineral fertilizer and digestate) and three NaCl concentrations (0, 3, and 7.5 dS m− 1). High NaCl concentrations resulted in significantly lower photosynthesis, growth, and physiological indices compared with those under no NaCl addition. However, under the 7.5 dS m− 1 NaCl condition, digestate application (DA) increased the fresh weight (42%), dry weight (27%), photosynthetic pigment contents and photosynthesis (20%) of lettuce compared with that under mineral fertilizer application (MFA). Accumulation of reactive oxygen species was markedly lower, and the membrane stability index was therefore higher, under DA compared with under MFA within the same salinity level. Lipid peroxidation was lower under DA compared with under MFA in all salinity treatments. Salt stress up-regulated the antioxidant system and DA further increased the enzymatic and non-enzymatic antioxidant capability compared with that under MFA. In addition, the total water use was lower and water-related indices, such as water use efficiency of fresh weight, water use efficiency of dry weight and relative water content, were higher under DA compared with under MFA. The application of digestate instead of mineral fertilizer could be a promising practice to alleviate the negative impact of salt stress on the productivity and physiological characteristics of lettuce plants.

Olive Yield and Physicochemical Properties of Olives and Oil in Response to Nutrient Application under Rainfed Conditions.

The effects of mineral fertilizers on the physicochemical properties of olives and oil under rainfed conditions is scarce. In this three-year study, the results of a nitrogen (N), phosphorus (P), potassium (K) and boron (B) fertilization trial carried out in a young rainfed olive grove and arranged as a nutrient omission trial are reported. The control consisted of the application of N, P, K and B (NPKB) and four other treatments corresponded to the removal of one of them (N0, P0, K0 and B0). Olive yield and several variables associated with the physicochemical properties of olives and oil were evaluated. The NPKB treatment increased olive yield compared to the treatment that did not receive N (N0). Although dependent on the climate conditions of the crop season, the NPKB treatment increased fruit weight and the pulp/pit ratio and its fruits tended to accumulate more oil than K0. However, the phenolics concentrations on fruits and oil tended to be lower. All olive oil samples were classified in the "extra virgin" category and all showed a decrease in its stability between 3 and 15 months of storage, regardless of treatment, especially in N0, P0 and B0 treatments. The results of the sensorial analysis indicate that all the oils fell into the medium fruitiness and greenly-fruity category. Only in P0 and B0 were defects detected, namely muddy sediment. Thus, this study seems to indicate the importance of N application, but also a balanced nutrient application and that further studies are needed, given the difficulty in finding clear trends in the response of measured variables to fertilizer treatments.

UPTAKE OF MICROELEMENTSINOILSEED RAPE PLANTS UNDER MINERAL FERTILIZATION WITH NITROGEN AND PHOSPHORUS

With a large and growing demand in the market, rapeseed (Brassica napus subsp. napus.) is a crop with relatively high requirements for macronutrient fertilization. The aim of the experiment was to study the effect of mineral fertilization with different doses of nitrogen and phosphorus on the accumulation of microelements in the vegetative organs and grains of oilseed rape plants.The experiment was carried out in the long-term experimental fields of SCDA Livada. There were taken and analyzed 96 plant samples and the results were statistically processed. Fertilization with nitrogen and phosphorus led to statistically assured changes in the contents of microelements, mostly in the aerial parts of the rapeseed. Regarding their accumulation in the grain, there were obtained variations of contents that were not significant to all doses of fertilizer applied. The conclusions of the experiments showed that the evaluation of contents of manganese, iron, zinc, and copper in rapeseed plants can help in choosing the optimal dose of mineral fertilizers in order to assure balanced microelement composition in plants and thus, consequently to avoid their deficiency.

Влияние минеральных удобрений на формирование зерна кукурузы на каштановых почвах Волгоградской области

The article presents materials on the effect of mineral fertilizers on the formation of corn grain when cultivated on chestnut soils in the Volgograd region. When corn is grown for grain, on the southern chernozems of the Volgograd region under irrigation, the limiting factor is the content of nutrients in the soil. This is evidenced by the high responsiveness of corn to the applied mineral fertilizers. Corn differs from most annual cereals in its thick stalk, tall growth and powerful large leaves. In the dynamics of nutrients, under corn crops, the following pattern was observed: the content of nitrates in the soil increased until the corn flowering phase, then it decreased due to their consumption during flowering and filling; the content of easily hydrolysable nitrogen increased in the soil before the isolation of the corn grain. The results of our research showed that corn is a very demanding crop for nitrogen. The daily need for nitrogen in the heading-flowering phase is about 1.6 kg. Half of the amount of nitrogen required was absorbed during the fundamental phase of corn growth and development. There were no distinctive features in the presence of available phosphorus in hybrid crops in the initial stages. The content of potassium in the soil in the post-harvest period in the variants without fertilization decreased by 2 times compared to its content before sowing, while in the variants with the use of specified doses of mineral fertilizers, this decrease was 24% on average for the variants. The purpose of the research was to substantiate the influence of agricultural practices, under conditions of regular irrigation against the background of the calculated background of mineral fertilizers, on the cultivation of domestic corn hybrids.

The effect of mineral fertilizers and pesticides on the yield and quality of spring barley grain in the conditions of the Krasnoyarsk forest-steppe

The study was conducted in the Krasnoyarsk forest-steppe on leached chernozem. The scheme of the experiment included the introduction of ammonium nitrate and azophoska. The spring barley protection scheme was studied, represented by the preparations Hat Trick, SC, Ballerina Super, SE, Lastik Extra, CE, Reggie, VRK, Baliy, KME, Borey Neo, SC. The repetition of the experience is 4 – fold. The registered area of the plot is 45 m2. Seeding rate - 5.0 mln. The humus content in the soil was determined in accordance with GOST 26213-84, nitrate nitrogen according to GOST 26951-86, mobile compounds of phosphorus and potassium - according to GOST 26204-91. The protein content in the grain was carried out in accordance with GOST 10846-91, the nature of the grain - GOST 10840-64, the mass of 1000 grains - GOST 10842-89. Preliminary studies have established that the maximum yield of barley was obtained with the introduction of azofoski (N60P60K60) and the use of protective equipment - 5.93 t/ha, compared with the control, the increase was 1.82 t/ha or 30.6%. The highest value of the protein content was noted when azofoski was applied - 13.40%. The pre-sowing application of azofoski and the use of plant protection products increased the mass of 1000 grains by 3.2 - 4.8 g, the grain nature by 18 - 26 g/l compared with the control.

Modulação de atividades enzimáticas e da comunidade microbiana do solo após adição de condicionador de solo a base de cama de frango e enriquecido com Bacillus spp.

ABSTRACT The global consumption of mineral fertilizers has increased in the last 60 years. However, these fertilizers can negatively affect the soil and the atmosphere. The application of soil amendments focusing on sustainable farming practices can reduce the effects of mineral fertilization. In this study, we investigated the effects of increasing the dose of a commercial amendment using poultry litter enriched with Bacillus (SMARTGRAN) in different types of soils in Brazil under microcosm conditions. These different types of soils were classified as Nitossolo, Argissolo arênico, Argissolo alumínico, Latossolo distroférrico, and Latossolo distrófico. The biological activity in the soil was quantified by measuring the enzymes arylsulfatase, beta-glucosidase, and acid phosphatase. Additionally, bacterial diversity was evaluated by amplicon sequencing of the 16S rRNA gene and conducting phylogenetic analyses of three types of soils, which were selected because of their occurrence and fertility profiles. The results showed an increase in those enzyme activities under all conditions. The results of the analysis of the bacterial community in Nitossolo, Argissolo arênico, and Latossolo distrófico soil types showed a direct relationship between the bacterial composition in the soil and the increase in the amendment dosage. The alpha diversity indices decreased considerably because some plant-growth-promoting bacteria, such as Bacillus, Massilia, Paenibacillus, and Rhizobium, increased in relative abundance. The results indicated that an organic amendment enriched with Bacillus had a beneficial effect on different types of soil in Brazil.

Influence of mineral fertilizers on the growth, development and productivity indicators of large clustered grapes

The article examines the effect of mineral fertilizers on the growth, development and yield of grape varieties with large clusters. The transition periods of phenological phases, productivity indicators, chemical composition of grape bunch cluster weight and juice, influence of mineral fertilizers on the mechanical composition of grape bunch and cluster were determined. In the study of the effects of different rates of mineral fertilizers, the transition periods of phenological phases, the mechanical and chemical composition of grape bunch clusters were analyzed mathematically and statistically, it was proved that the highest result was given when N160 P120 K40 kg/ha was given. When mineral fertilizer N160 P120 K40 kg/ha is applied, flowering and ripening periods start 3 and 6 days earlier in varieties, sugar content is 1.6% high, acidity is 0.5 g/l, shingles is 1.5%, and flesh and juice is 1.8 % is high, 2.8% is less in the seed and it is found that the rudiment seed does not differ significantly.

Вплив тривалого внесення добрив на агрохімічні показники чорнозему типового та якість зерна пшениці озимої

The aim of the article is to present the results of analytical research on the evaluation of changes in the parameters of the properties of typical chernozem in a stationary field experiment under the influence of 28 years of application of various types and combinations of mineral fertilizers on two agrophones in a crop rotation. The experiment established in 1990 on a typical heavy loam chernozem (Haplic Chernozem) in the experimental farm "Hrakivske” which belongs to the NSC "Institute for Soil Science and Agrochemistry Research" named after O. N. Sokolovsky, in the Chuguyiv district of the Kharkiv region. The aim was to conduct agroecological monitoring in conditions of intensive agriculture to establish the permissible level of load of intensive chemicalization on physical, chemical, and biological soil processes. In the soil samples taken in 2019 from the 0-30 cm layer, the changes that occurred after long-term application of fertilizer in the pH of the soil solution and the content of the following soil components were determined: humus; mineral compounds of nitrogen; nitrate nitrogen; ammonium nitrogen; mobile phosphorus compounds; mobile compounds of potassium. The quality of winter wheat grain determined by the gluten content. Seven variants of the experiment with different fertilizer combinations and the control variant (without fertilizers) placed on two agrophones: natural (only mineral fertilizers applied) and after-effect of manure (mineral fertilizers and manure applied). The results of the research in 2019 compared with the initial state of the soil in 1990 separately at each site, thus revealing changes in the parameters of the agrochemical characteristics of the soil under the influence of different types of fertilizers. Common conclusion. In the Left-bank high Forest-Steppe of Ukraine, the long-term (28 years) application of mineral fertilizers in the natural agrophone has a negative effect on the reaction of the soil solution and the content of total humus, but has a positive effect on the accumulation of mobile compounds of nitrogen, phosphorus, and potassium in the soil. The negative effect of mineral fertilizers on the soil properties manifested to a lesser extent after the application of manure. The application of nitrogen and phosphorus fertilizers in the norms of N60P120 provides a gluten content in winter wheat grains at the level of 25 %, which meets the regulatory requirements of the second class of group A.

Effect of Spraying Mineral Fertilizer and Sorbitol Sugar on Growth and Yield of Capsicum frutescens L.

This experiment was carried out in order to study the effect of Mineral fertilizer and Sorbitol Sugar on the growth, and yield produced by chili pepper plant Barbarian F1, A factorial experiment with two factors, Mineral Fertilizer concentration 0, 0.5, 1, 1.25 and 1.5 g L-1 and Sorbitol Sugar 0 and 10 g L-1 was used in the term of (RCBD) with three replications. The results showed significant superiority of Mineral Fertilizer at 1.5 ml-1 in the plant height (59.62 cm plant-1 ), number of main branches plant-1 (5.600 branch plant-1), total leaf area (21.100 dm2 plant-1), number of fruits plant (88.25 fruit plant-1). One plant yield (0.718 kg plant-1) and total yield (23.94 tons hectare-1). The result also showed a significant increase of Sorbitol sugar in concentration 10 g L-1 in the plant height, number of branches1, total leaf area by balance, number of fruits, (58.63cm, 5.493 branch plants-1, 21.98dm2, 84.78 fruit plant-1, 0.685 kg plant-1, and 23.03 ton hectare-1 respectively). The interaction indicated that both variables were significant for all the studied traits, indicated that the response of pepper to the first variable is related to the second one. Thus, the research has concluded that the Interaction of variables, mineral fertilizer (1.5 g L-1) and Sorbitol Sugar 10 g l-1 has a great combination to increase the growth and the yield of chili pepper.

Patterns of changes in biometric indicators and productivity of giant miscanthus under the effect of mineral fertilization and foliar application of fertilizers in the Right Bank Forest-Steppe

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The effect of correlation between a spring wheat variety with soil tillage technologies and doses of nitrogen fertilizers on the interannual yield stability

There was studied the possibility of reducing the effect of weather conditions on spring wheat productivity in the Non-Blackearth zone due to improving tillage technologies. There has been established that on soddy-podzolic light loamy soil, on the fields of the Ivanovsky Research Institute of Agriculture in the period 2013–2019, the difference in the number of productive stems per m2 when using plowing or minimal tillage was not significant when the HTC changed from 0.73 to 2.65, except the year of 2017 (HTC = 2.19), when there was increased soil moisture throughout the vegetation period. The advantage of minimal tillage under these conditions was 30 %. According to number of kernels per ear, there was identified a significant advantage (more than 20 % (HTC = 2.65; 0.99)) of plowing over minimum tillage (by 13–14 %) during the years with soil moisture in the wheat booting stage. When applying experimental tillage, there have been formed areas with a variable density in the lower part of the arable layer, each of which is favorable for plant development under a certain soil moisture. The transition to experimental tillage has increased number of productive stems on 1–6 %. Number of kernels per ear when using experimental tillage significantly exceeded this indicator (by 5–18 %) under a minimum tillage in the entire range of moisture. Compared to plowing, the advantage of experimental tillage according to number of kernels per ear was 0–27 %. The effect of weather conditions on a number of productive stems was 74.8 %, and number of kernels per ear was 32.4 %. The effect of mineral fertilizers on these parameters of the yield structure was 1.8 and 26.2 %, respectively.

YIELD OF WINTER BARLEY DEPENDING ON MINERAL NUTRITION

The article presents the results of studies of the influence of mineral fertilizers on the yield of winter barley in the Western Forest-Steppe.
 It has been found that grain yield depends on providing plants with mineral nutrients throughout the growing season. The results of scientific research on the influence of mineral nutrition on seed germination, plant survival during the growing season, grain yield and structure of winter barley cultivated on gray podzolic soils in the Western Forest-Steppe are described. The authors of the research studied different doses of mineral fertilizers: 1) without fertilizers (control); 2) N30Р30К30; 3) N60Р60К60; 4) N90Р90К90.
 A decrease in field germination by 1.1–2.3 %, with an increase in the level of mineral nutrition was determined.
 The positive effect of mineral fertilization on the survival of winter barley has been proved. The lowest level of plant survival was in the areas without fertilizers, and the highest – under application of mineral fertilizers in the norm N90Р90К90.
 The positive effect of fertilization on the number of productive stems, the weight of grain from the ear and the number of grains in the ear was demonstrated. A positive correlation was established between fertilizer and the number of grains in the ear (r = 0.96) and fertilizer and grain weight from the ear (r = 0.77). It was found that the studied rates of fertilizers were effective for the nutritional regime of winter barley agrocenosis in the Western Forest-Steppe. The optimal dose of fertilizers which ensures maximum grain yield was determined. Application of phosphorus and potassium fertilizers (Р90К90) for plowing and nitrogen (N30+30+30) in three steps: during the restoration of spring vegetation, in the phase of tube emergence and earing provided a significant increase in yield as compared to control (without fertilizers) and options N30Р30К30 and N60Р60К60.

Enzymatic Activity of Soil after Applying Mineral Fertilizers and Waste Lignite to Maize Grown for Silage

This paper examines the effect of mineral fertilizers and waste lignite, the latter applied to the preceding crop, on the enzymatic activity of soil. The research was conducted between 2014 and 2016 at the Agricultural Experimental Station of the Siedlce University of Natural Sciences and Humanities in Zawady (Poland). The following treatment combinations were involved: 1—control; 2—NPKMgS; 3—NPKMgS + 20 N; 4—NPKMgS + 40 N; 5—NPKMgS + 60 N. Three varieties of maize grown for silage constituted the second research factor. Mineral fertilizers were applied at the following doses (pre-sowing): N-100, P-35, K-125, Mg-12 and S-14 kg ha−1. Nitrogen was additionally applied as top dressing with 3, 4, and 5 treatment combinations at 20, 40, and 60 kg ha−1. Waste lignite was applied to the preceding crop on two plots (3 and 4), in 1 and 5 t ha−1 doses. In the subsequent years, the significantly highest content of soil organic carbon was recorded on the NPKMgS + 60 N plot (1.12%; 0.98% and 1.16%). With 49.25 and 51.95 mg NH4-N h–1 kg–1 DM, urease activity in the soil treated with NPKMgS + 20 N and NPKMgS + 40 N was 56.95% and 65.55% higher than in the control plot soil. Throughout the experimental years, acid phosphatase activity did not vary much and amounted to 3.51–3.53 mmol PNP h–1 kg–1 DM. Mineral fertilizers significantly increased the activity of alkaline phosphatase and dehydrogenases in relation to the control. To ensure the high enzymatic activity of the soil and a high biochemical index of soil fertility, pre-sowing fertilizers at the level of 100 kg N, 35 kg P, 125 kg K, 12 kg Mg, and 14 kg S per hectare and top dressing of 20 kg N or 40 kg N per hectare are recommended. At the same time, it is advisable to use 1 t ha–1 or 5 t ha–1 of waste lignite of low energy value on the preceding crop.

Yields and grain quality of winter rye cultivated on sod-podzolic radioactively contaminated soil depending on the applied means of chemicalization

Relevance. The effect of mineral fertilizers of various degrees of saturation and the biological preparation Albit on the yields and quality of winter rye grain of the Moskovskaya-12 variety has been studied in a stationary field experiment on the radioactively contaminated sod-podzolic sandy loam soil. Methods. The researchers conducted (2019–2021) at the experimental field of the Novozybkov branch of the Bryansk State Agrarian University established that the highest yield of winter rye grain (4.37 t/ha) was formed when using full mineral fertilizer N90P60K150 against the background of treatment of winter rye plants with biopreparation Albit. Results. Under the influence of the applied means of chemicalization, an improvement in the biophysical parameters of winter rye grain has been noted. The content of raw protein in winter rye grain, depending on the fertilizer systems used, has varied from 11.3 to 13.5% with its highest collection (0.599 t/ha) per unit area when using the N90P60K150 fertilizer system in combination with the biopreparation Albit. The use of the complete mineral fertilizer (NPK) with consistently increasing doses of potassium both separately and in combination with the biopreparation Albit has contributed to a decrease in the specific activity of 137Cs in winter rye grain by more than 2.1 times in comparison with the control.