Use Of Organomineral Fertilizers Research Articles

Parameters of Aerobic Biocomposting of Various Age Wastewater Sludge with the Addition of Plant Raw Materials

Decades of accumulated wastewater sludge (WWS) at Ukrainian sewage treatment plants (STP) represent a significant environmental hazard. In European countries, the predominant methods for managing sludge at STPs are thermal drying and sludge incineration, both of which come with substantial initial and ongoing expenses. In Ukraine, a more cost-effective and energy-efficient solution is aerobic biocomposting of WWS, resulting in the production of an organo-mineral mixture. Depending on the input sludge, this mixture can be utilized for land restoration and landfill rehabilitation. The capital costs associated with the implementation of biocomposting are 3-5 times lower than for drying and 8-10 times lower than for incineration. The resulting compost contains a sufficient amount of nutrients necessary for plant growth and development. Extensive research has shown that the use of organo-mineral fertilizers derived from WWS increases the humus content and boosts crop yields. Nevertheless, the optimal methods for implementing biocomposting to produce versatile substrates for various biological reclamation projects remain very relevant.

Organomineral Fertilization Associated with Inoculation of Rhizobium tropici and Co-Inoculation of Azospirillum brasilense in Common Bean

The use of organomineral fertilizers can serve as a nutritional source for crops, ensuring sustainability in the production system. Another alternative approach is through the inoculation and co-inoculation of microorganisms. The objective of this study was to evaluate the development, nutrition, and agronomic yield of common beans through fertilization with the organomineral formula “OMF”, derived from sewage sludge biosolids, combined with Rhizobium tropici inoculation and co-inoculation with Azospirillum brasilense techniques. Three bean cultivars from different commercial groups, Pérola, BRS Esteio, and BRS Pitanga, were tested. They underwent OMF application; OMF application combined with seed inoculation with Rhizobium tropici and re-inoculation; seed co-inoculation with Rhizobium tropici + Azospirillum brasilense prior to sowing; and foliar re-inoculation with Rhizobium tropici + Azospirillum brasilense. The results indicated that seed inoculation, combined with leaf re-inoculation at the V4 stage, resulted in greater bean productivity. The combination of Rhizobium tropici with co-inoculation with Azospirillum brasilense generally led to increased productivity compared to mineral nitrogen fertilization. The exclusive use of OMF enabled development and productivity gains. The Pérola bean cultivar showed better adaptation to the applied treatments. In conclusion, this research suggests that there are benefits to using OMF with symbiotic bacteria and growth promoters.

Agronomic efficiency of organomineral fertilizer in onion cultivation

Onions has high nutritional and nutraceutical value. In the last decade the bulbs have gained increasingrelevance due their compounds linked to anti-cancer effects. The fertilization managment is relevant to thiscrop because the mineral’s influence beyond productivity, interfering in several aspects of quality. Organicsources despite available, adoption is still cautious and seen as an expense, rather than investment in soilquality. Therefore, the objective was to evaluate the use of organomineral fertilizer on the development andproductivity of Akamaru hybrid. The experiment was carried out in Cristalina-GO, in a randomized block design,with 4 replications and 5 treatments: organomineral fertilizer (NPK) with the formula 02-20-05. The rates wereadjusted to approximately the same amounts, where 3,680 kg ha-1 was considered the 100% rate, 2,944 kg ha-1as 80%, 2,208 kg ha-1 as 60% and 1,472 kg ha-1 as 40% of the rate established. The rate of 2,300 kg ha-1 of theformulated 03-35-06 referred to 100% of the mineral source. The total yield of onion was not affected when theorganomineral source was used, therefore, it is a viable source for use in onion culture. A rate reduction of upto 20% of the recommended mineral rate allows good performance (85.5 t ha-1), with 7.5 t ha-1 higher than the60% reduction of the recommended rate.

Physiological quality of soybean seeds as a function of organic-mineral fertilizers

The objective of this work was to evaluate the physiological and sanitary quality of soybean cultivars as a function of doses and sources of organomineral fertilizers. The experimental design was randomized blocks arranged in a split-split plot, with three replications. In the main plots, the treatments consisted of two soybean cultivars (BRASMAX Bônus IPRO and BRASMAX Olimpo IPRO), and in the subplot, the treatments consisted of three phosphate fertilizers [two organomineral fertilizers manufactured and a phosphate fertilizer (simple superphosphate)]. In the subplot, doses of 0 (control), 50 and 100 kg of P2O5 per ha-1 were used. The following parameters: moisture content, emergence, total dry weight, germination, accelerated aging, electrical conductivity and seed sanity were used in current investigation. The use of organomineral fertilizers resulted in positive effects on the physiological quality of soybean seeds, although the incidence of the pathogens Cercospora sp., Aspergillus niger, and Rizoctonia sp. were larger. The combinations of the factors “BRASMAX Bônus IPRO + 50 kg of P2O5 per ha-1 + ORG1 or ORG2” and “BRASMAX Olimpo IPRO + 100 kg of P2O5 per ha-1 + ORG2” were associated with greater physiological and sanitary quality of the seeds of soybean.

Correlations of agronomic characteristics of soybean cultivated with the use of organomineral fertilizers

The use of correlations can identify the traits correlated with soybean grain yield. Therefore, the objective of this study is to use path analysis to examine how agronomic traits influence grain yield in soybeans, taking into account different doses and sources of organominerals used in cultivation. The experimental design used was randomized blocks arranged in a sub-subdivided plot with three replications. In the plots, the treatments consisted of two soybean cultivars (BMX Bônus IPRO and BMX Olimpo IPRO), and in the subplot, the treatments consisted of three phosphate fertilizers [two organomineral fertilizers manufactured and a phosphate fertilizer (simple superphosphate)]. The subplot used doses of 0 (control), 50, and 100 kg ha-1 of P2O5. At full flowering, the relative chlorophyll index was evaluated. At physiological maturity, plant height, first pod insertion height, number of stems, pod number, number of grains per pod, thousand-grain mass, and grain yield were evaluated. The plant height variable presented the greatest positive direct effect on the soybean yield cultivated using organomineral fertilizers.

Effects of Fertilization Types and Base Saturation on the Growth and Water Productivity in Panicum maximum cv. BRS Zuri

Fertilization management is essential for forage production. However, excessive use of synthetic fertilizers causes environmental imbalances. An alternative to reduce these effects is to seek alternative fertilizers, such as wood ash produced from agro-industrial waste, when integrated with appropriate base saturation management. This study aims to compare the effects of fertilization with wood ash (WA), organomineral (OM), and mineral (M) fertilizers associated with different levels of base saturation on the growth and water productivity of Panicum maximum cv. BRS Zuri. The experiment was conducted in a greenhouse, using a randomized block design in a 3 × 3 factorial arrangement. The treatments consisted of three types of fertilization (WA, OM and M) and three levels of base saturation (0, 25%, and 50%). Leaf area, chlorophyll index, shoot dry mass and root dry mass, water consumption, and water productivity of Zuri grass were evaluated. The results showed significant increases in leaf area, with values of up to 4564.5 cm2.pot−1 and a chlorophyll index of up to 36.2 units. In addition, the dry mass of the aerial part reached up to 46.7 g.pot−1, and the dry mass of the roots reached 21.7 g.pot−1 with the use of OM fertilizers. These values represent an increase of between 43.1% and 69.6% compared to the values of conventional fertilizers. In addition, water productivity reached 4.9 g.L−1 with WA-based fertilizers, an increase of around 39% compared to the values of mineral fertilizers.

English

This study aimed to identify fertilization options for improving cassava productivity and profitability in two contrasting regions of the Central African Republic. The Pissa (guinea forest) and Damara (savannah). The study adopted a randomized complete block design with four treatments replicated four times in a plot size of 7 m by 7 m. The treatments were; T1 (Control), T2 (Peasant practice), T3 (sole NPK), and T4 (Cow manure+NPK). We performed the analysis of variance (ANOVA) using R statistical software version 3.1.2. The yield attributes and growth parameters significantly varied (p=0.05) with application of NPK and NPK plus manure. The use of 3 t ha-1 of cow manure and 90N-30P-180 Kg ha-1 of mineral fertilizer gave the highest yield of  50 and 37 t ha-1 in Pissa and Damara respectively compared to their local controls (no input); This combination also resulted in high profitability with high value-to-cost ratios (RVC = 2 in Pissa and 1.3 in Damara). The variability study (48.11%) showed a correlation between growth and production parameters; the effects of fertilizers were much more expressed in the plant’s circumference and the number of leaves. The use of organo-mineral fertilizer can give good productivity and profitability. Thus, T4 is a technology that resource-poor households can easily use, although the purchasing power of the peasant farmers in the study area is low. Key words: Cassava, agro-climatic, fertilizers, yields, Central African Republic.

Organo-Mineral Fertilization Based on Olive Waste Sludge Compost and Various Phosphate Sources Improves Phosphorus Agronomic Efficiency, Zea mays Agro-Physiological Traits, and Water Availability

In the context of intensive and sustainable agriculture, limiting soil degradation and the loss of organic matter has become an obligation to maintain food security. The use of organo-mineral fertilizer (OMF) products is an innovative technology that may solve the different challenges raised. This study aimed to evaluate the effect of various organo-mineral fertilizer (OMF) formulations on Zea mays agro-physiological traits, phosphorus (P)-related parameters, and water conservation during a 90-day pot experiment. The OMF formulations consisted of blending several doses of a stable OMWS compost (10 t /ha(OMF1), 50 t/ha (OMF2), or 100 t/ha (OMF3)) with different sources of mineral P, namely diammonium phosphate (DAP), rock phosphate (RP), or phosphate washing sludge (PWS), compared with separate applications. The results indicated that the effect of an OMF on the soil and plants was strongly dependent on the source of P used and the dose of OMWS compost. The best agronomic performance was attributed to OMF1-based DAP, which resulted in a significant improvement in the shoot and root biomass dry weight by more than 260% and 40%, respectively. However, using an OMF2 formulation was more optimal when using RP and PWS as mineral P sources. Independently of the type of P fertilizer, the addition of stable OM systematically improved multiple soil properties, including water availability, and the nutrient concentrations, such as the available P, exchangeable potassium, and magnesium. Furthermore, the plant’s respiration, photosynthetic activity, and nutrient assimilations were positively affected by the OMF formulations. Overall, our results demonstrate that organo-mineral fertilization is a promising solution for increasing the efficiency of low-P and high-P mineral fertilizers in alkaline soils through direct and indirect mechanisms involving improved soil properties and higher P solubilization.

Plantio direto de repolho sobre resíduos de diferentes plantas de cobertura e fontes de fósforo no cerrado

ABSTRACT No-till planting and the use of organomineral fertilizers are crop management practices that increase soil organic matter, thereby mitigating leaching and cycling a considerable amount of nutrients, with the potential to improve crop yield. This study aimed to assess the agronomic performance of cabbage grown under a no-till system, using different cover crops and phosphorus sources. A randomized block design was used, with the main plot consisting of eight split plots for different cover crop treatments: 1) Signal grass (SG); 2) Sunn hemp (SH); 3) Pearl millet (PM); 4) SG+SH; 5) SG+PM; 6) SH+PM; 7) SG+SH+PM; 8) conventional tillage (soil preparation with no cover crop), and phosphorus (P) sources in the sub-plots: 1) mineral fertilizer (FM); 2) organomineral fertilizer (OF); 3) no P, with four repetitions. The following characteristics were assessed: cover crop fresh (FW) and dry weight (DW) (t/ha), residue decomposition and nutrient cycling; and cabbage head FW and DW (HFW and HDW) (g/plant) and yield (YLD) (t/ha). The highest FW and DW were recorded in the intercropped cover plant treatments; PM+SH and SG+SH residue exhibited the highest decomposition rate and P cycling into the soil. The highest cabbage HFW and YLD occurred in the SG+SH treatment, regardless of the fertilizer used. The MF used as P source produced a greater cabbage YLD when grown in PM residue. Under conventional tillage, YLD was higher when OF was used as P source.

Cultivo de alface sob diferentes doses de organomineral como fonte de fósforo e micronutrientes

ABSTRACT The use of organomineral fertilizers (OF) in the cultivation of vegetables has been considered a promising technology to provide nutrients gradually. The OFs can reduce the phosphorous (P) soil adsorption and leaching of nitrogen and potassium with the supply of some micronutrients. This study aimed to evaluate doses of OF as a source of P and micronutrients (boron and zinc) for curly lettuce cultivation. Five OF doses were evaluated: T1 = 0% (no P2O5 fertilization); T2 = 50% (75 mg/dm3 of P2O5); T3 = 100% (150 mg/dm3 of P2O5); T4 = 150% (225 mg/dm3 of P2O5); T5 = 200% (300 mg/dm3 of P2O5) of the lettuce recommended fertilization; T6 = 100% mineral fertilizer (MF) (150 mg/dm3 of P2O5). The fresh (FM) and dry mass (DM) of the lettuce shoot (aerial part), the soil nutrient level, and the plant nutritional status at harvest were evaluated. We observed that (i) the doses of 225 and 300 mg/dm3 of P2O5 via OF provided the same availability of P in the soil as the dose of 150 mg/dm3 of P2O5 of MF; (ii) the doses of 225 and 300 mg/dm3 of P2O5 of OF provided higher levels of soil boron and zinc compared to other treatments and (iii) the MF fertilization was more efficient than that of OF in the production of curly lettuce in a protected environment.

Bacillus velezensis Associated with Organomineral Fertilizer and Reduced Phosphate Doses Improves Soil Microbial—Chemical Properties and Biomass of Sugarcane

Appropriately using phosphorus (P) for the fertilization of sugarcane is critical to achieving high productivity because it is one of the most limiting nutrients in agricultural cropping systems. Thus, the objective of this research was to evaluate the morphological, biochemical, and yield responses of sugarcane, and the soil microbial–chemical properties, under the use of organomineral fertilizer (OF) associated or not with Bacillus velezensis strain UFV 3918 (B) combined with mono ammonium phosphate (MAP) doses. The experimental design used was completely randomized, consisting of eight treatments [Control (3/3 MAP); OF (without MAP); OF + 1/3 MAP; OF + 2/3 MAP; OF + 3/3 MAP; B + OF + 1/3 MAP; B + OF + 2/3 MAP; B + OF + 3/3 MAP] and four replicates. B + OF + 1/3 MAP provided increases in accumulated soil basal respiration (11.9%), carbon of microbial biomass (35.9%), fluorescein diacetate (12.7%), arylsulfatase (25.5%), and acid phosphatase (10.1%) activity compared to the control, which implied in higher shoot and total biomass. These results present a potential strategy for sugarcane fertilization, using bacteria in combination with OF to improve P nutrition and growth in sugarcane with reduced economic and environmental impact.

ВЛИЯНИЕ ОРГАНО-МИНЕРАЛЬНОГО УДОБРЕНИЯ НА ПРОДУКТИВНОСТЬ ВИНОГРАДНЫХ РАСТЕНИЙ

The results of studies on the effect of organo-mineral fertilizer on agrobiological and econom-ic indicators of Cabernet Sauvignon grapevine variety are presented. To determine the biologi-cal effectiveness of the fertilizer on grapevine, foliar feeding of Cabernet Sauvignon plants was carried out during the phase of inflo-rescence advancement and 15 days after. Foliar feeding of plants with organo-mineral fertilizer had a positive effect on the formation of berries and clusters, contributing to an increase in their mass. At the drug consumption rate of 5.0 l/ha and 7.0 l/ha, both the number of berries in a bunch and the weight of one berry significantly increased compared to the control. The use of organo-mineral fertilizer also contributed to bet-ter pollination and an increase in berries in bunches, which together contributed to an in-crease in yield, depending on the applied con-sumption rates, by 8.7‒11.6 %. Estimation of quality characteristics of berry juice during har-vesting showed its compliance with standard varietal conditions in all variants of the experi-ment, despite the significant differences in the mass concentration of sugars between the con-trol and variant 3 (7.0 l/ha). The acidity of berry juice differed insignificantly between the vari-ants and the control. When feeding plants with organo-mineral fertilizer, the growth activity of shoots significantly increased in all variants of the experiment compared to the control variant. An increase in the activity of growth processes led to a decrease in shoot maturation (73.2‒74.4 %) at all drug consumption rates compared to the control (84.9 %). However, the percentage of shoot maturation in all variants is high enough for successful overwintering of plants.

Results of application of organomineral fertilizer obtained with biocatalytic processes

Relevance. The results of a study on the use of organomineral fertilizers obtained using biocatalytic processes for detoxification of poultry waste and their influence on the growth and development of plants during the growing season are presented.Methodology. For poultry farms, it is necessary to create and introduce waste-free technologies for the preparation of fertilizers. To increase the efficiency of the fertilizer as a biological catalyst, we used a bacterial growth stimulator sodium humate, obtained by us according to a previously developed technology from brown coal from the Maikubenskoye deposit in the Republic of Kazakhstan («Method for producing sodium humate» Patent No. 4600 RK), as well as a sorbent based on sodium humate (a by-product of obtaining sodium humate), which was used to detoxify the feedstock and the resulting product from heavy metals and their salts due to its absorption-adsorption and complexing properties. For the developed technology for producing organic fertilizers, an application has been submitted for obtaining a Patent for the invention of the Republic of Kazakhstan «Method for producing organic fertilizers» (priority No. 2021-22818, dated July 13, 2021). Studies to determine the effectiveness of the resulting fertilizer were carried out on the experimental plots of the peasant farm «Flame», Pavlodar district of Pavlodar region of the Republic of Kazakhstan. In the soil intended for growing seedlings of tomatoes of the «Pepper-shaped Orange» variety and peppers of the «Bogatyr» variety, the resulting fertilizer was applied in an amount of 1 kg per 1 m2 of soil, which was dug to a depth of 8-10 cm and used for growing seedlings in greenhouses and in subsequent for planting it in open ground. xperimental and control studies were carried out under equivalent climatic conditions, scheme and technology of watering plants. In total, 100 bushes of each plant species were used in the experiment.Results. The use of the obtained organomineral fertilizer makes it possible to increase the yield of vegetable crops (tomatoes, peppers) by 20-25% in comparison with the control. In addition, in the experimental samples, an increase in the number of fruits on the bush was noted with an increase in their size, a decrease in the growing season and the number of damaged fruits.

Growth and productivity of ágata potato cultivar under different doses of organomineral fertilizer

Potato is a plant that has high nutrient demand during its cycle. Given the concern with the environment, due to the large amount of synthetic mineral fertilizer used in the crops, the objective of this work was to evaluate the efficiency of organomineral fertilizers in the cultivation of potato, cultivar Ágata, under cerrado conditions. The experimental design was in subdivided plots, consisted of four doses of organomineral fertilizer, corresponding to 40, 60, 80, 100 and 120% of the mineral fertilizer dose in the organomineral source (2800 kg ha-1 of formulated 3-32-6) and the subplots consisted of four collection seasons (61, 74, 89 and 110 days after planting) and four repetitions. Organomineral fertilizer with 40% of the recommended dose for potato cultivation provides higher yield of tubers in the Especial potato class and higher accumulation of total dry mass, in addition to providing satisfactory productivity for the tubers of higher commercial value. The use of organomineral fertilizers promotes the same behavior as mineral fertilizers, not interfering with potato development.

Soil Organic Matter Fractions and Enzymes Activities under No-tillage System: Effects of Organomineral and Mineral Fertilizer with Humic Substances

ABSTRACT The use of organomineral fertilizer can promote increments of organic matter and affect the enzymatic activity of the soil. The objective of this research was to evaluate the effect of organomineral and mineral fertilizer with humic substances on soil organic matter fractions and enzymes activities. The study was set up in a Xanthic Ferrasol, in the Cerrado region, Brazil. Treatments consisted of two fertilizers and four rates of P fertilizer. The following fertilizers were studied: mineral fertilizer enriched with humic substances (03% of N, 25% of P2O5, 08% of K2O, with 1% humic substance); and granulated organomineral produced from poultry litter and mineral fertilizer (MAP – mono-ammonium phosphate, with 26.6% of P2O5 and 18.2% of organic carbon). Five rates of P were also evaluated (0, 20, 40, 60, and 80 kg ha−1 of P2O5). The crop production, soil organic matter fraction and enzymes were assessed in the 2014/2015 and 2015/2016 growing seasons. Contents of the total organic carbon, particulate organic carbon, humic acid, fulvic acid, and maize and soybean grain yield were positively influenced by the fertilizer application. Fertilization treatments did not affect the enzymes activities, but they showed positive correlations with particulate organic carbon.

PHYSIOLOGICAL RESPONSES OF PEANUT CROPS TO IRRIGATION WITH BRACKISH WATERS AND APPLICATION OF ORGANO-MINERAL FERTILIZERS

ABSTRACT The use of organo-mineral fertilizer is an alternative measure to mitigate salt stress in semiarid regions. Thus, the objective of this work was to evaluate the physiological indexes of peanut crops under irrigations with fresh and brackish waters and applications of organo-mineral fertilizers. The experiment was conducted from June to September, 2019, at the Universidade da Integração Internacional da Lusofonia Afro-Brasileira (UNILAB), in Redenção, state of Ceará, Brazil, using a completely randomized experimental design in a 5 × 2 factorial arrangement, with four replications. The treatments consisted of five soil fertilizers (F1= 100% NPK mineral fertilizer at the recommended rate; F2= 100% bovine manure-based biofertilizer; F3= 100% plant ash; F4= 50% mineral fertilizer and 50% bovine manure-based biofertilizer; and F5= 50% mineral fertilizer and 50% plant ash); and two salinity levels (electrical conductivities) of the irrigation water (1.0 and 5.0 dS m-1). Photosynthetic rate, transpiration, stomatal conductance, leaf temperature, internal CO2 concentration, water use efficiency, and chlorophyll index of the plants were evaluated at 40 and 54 days after sowing (DAS). Plants irrigated with fresh water presented higher stomatal conductance, photosynthetic rate, and transpiration, regardless of the fertilizer used. The use of 100% bovine manure-based biofertilizer resulted in decreases in salt stress and increases in water use efficiency at 40 DAS, and decreases in leaf temperature and increases in relative chlorophyll content at 54 DAS.

Soil organomineral fertilization in garlic crop

Garlic (Allium sativum) stands out in the culinary and alternative medicine of many people. The crop is very responsive to adding fertilizers. Commonly the sources used are minerals, but in the last decade the demand for combining these with organic ones has grown, making up the organomineral fertilizers. Due to benefits in the soil and the consequent effect on crops yield, organominerals have been associated as a promising alternative in nutritional management. In this context, the objective was to evaluate the production of garlic under the application of organomineral fertilizer on soil. Quiteria was the variety used in the study. The design was a randomized complete block with five treatments: control (mineral fertilizer in the dose of 100% of the recommendation for the standard crop of the property) and four concentrations of the organomineral fertilizer (100; 80; 60 and 40% of the recommendation for the crop). The percentage of marketable garlic and SPAD index showed no significant difference between the fertilizations evaluated. It was concluded that the use of organomineral fertilizer in the rate of 80% offers the same performance in productivity compared to the 100% mineral, in addition to providing a higher quality in national garlic, as it offers a lower percentage of cull garlic bulbs, adding value in the national garlic chain.

Sewage sludge as organic matrix in the manufacture of organomineral fertilizers: Physical forms, environmental risks, and nutrients recycling

The use of organomineral fertilizers (OMFs) has grown worldwide, mainly in tropical conditions, combining economics and environmental management. Our study used a sewage sludge (SS) rich in Zn as the organic matrix in the manufacture of OMFs, with the following objectives: i) to select the best OMF physical form; ii) to evaluate environmental risks associated with their application; iii) to recycle SS nutrients for soybean (Glycine max) production; iv) to verify their benefits to soil microbial activity and other soil functions. For each soil individually, a clay and a sandy clay loam, six treatments were tested: control (CT, without fertilization); mineral fertilization (MF); MF plus Zn and B (MFZn + B); and three distinct physical forms for the OMFs [powder (Pw), granule (G), and pellet (Pt)], all calculated to provide 100 kg of P2O5 and performed in four blocks. Amending SS-OMFs did not represent an environmental risk in terms of spreading pathogens and hazardous trace elements. In comparison with MFs, SS-OMFs enhanced nutrients accumulation, pod numbers, and nodulation, as well as soil microbial activity, but did not affect shoot and root dry masses and enzymatic activities at early stages of soybean development (60 d after planting). They were also capable to supply Zn and B to plants and their distinct physical forms did not affect microbiological indicators of soil quality or nutrients accumulation in plant tissues. Overall, SS-OMFs seems to be a promising alternative for sustainable use of SSs in soybeans avoiding their disposal in landfills, but field studies are still needed to ratify the findings under more realistic conditions.

Сравнительная оценка комплексных удобрений при внесении под землянику садовую

Abstract. The productivity of wild strawberries is significantly determined not only by the biological characteristics of the variety and soil and climatic conditions, but also by agrotechnical techniques and the use of organomineral fertilizers. The effectiveness of the use of mineral fertilizers on strawberries has been proven by numerous studies [5, p. 48; 6, p. 99; 14, p. 233; 15, p. 513; 16, p.101; 17, p. 513]. The purpose is a comparative assessment of the effect of various types of complex fertilizers for strawberries. The task was to study the effect of complex fertilizers on the yield of strawberry and its structure. In 2015–2018, studies were conducted on the introduction of complex fertilizers for wild strawberries, which are used during the growing season to improve their nutrition during periods of maximum consumption of nutrients. Methods. The studies were conducted according to generally accepted methods [4], [7]. The influence of “Azophoska”, “Perm-yagodnoye” and “Fasko-yagodnoye” fertilizers on the yield and elements of its structure in strawberry was studied in the conducted studies. Results. The best results for all the years of research were obtained when using the pre-planting application of the fertilizer “Fasko-yagodnoye”. In this variant, there was a significant increase in the number of berries by 1.8 pcs., their weight by 0.68 g and yield by 0.13 kg/m2. Scientific novelty. For the first time in the conditions of the Udmurt Republic, the effect of the pre-planting application of complex fertilizers “Perm-yagodnoye” and “Fasko-yagodnoye” was studied on strawberry garden. Practical significance. The obtained research results are of great practical value, since it is proved that the productivity of wild strawberries in the Udmurt Republic increases with the use of complex fertilizers.

Resposta da produtividade do milho à adubação mineral e organomineral

Há um aumento das importações de fertilizantes minerais para suprir as necessidades do mercado interno. Sendo assim os fertilizantes organominerais surge como uma alternativa para fornecimento de nutrientes as plantas e a diminuição da dependência em relação as importações dos fertilizantes minerais. O experimento foi estruturado em delineamento em blocos casualizados com cinco tratamentos e quatro repetições, o arranjo dos tratamentos foi realizado a partir da combinação da aplicação do adubo mineral e organomineral em plantio e cobertura. Aos 30, 60 e 90 (fase de grão pastoso) DAE foram obtidas as variáveis em análise, como diâmetro de colmo (DC), altura de planta (AP) e altura de inserção da espiga (AIE). Para estimar a massa verde (MV) e seca (MS) das plantas foram recolhidas as partes aéreas durante o florescimento pleno da cultura. Foram poucas mudanças observadas no desenvolvimento das plantas como resultado do uso do organomineral em plantio ou cobertura, sendo que somente aos 30 DAE pode-se observar diferenças estatísticas entre os diferentes tratamentos nas variáveis altura e diâmetro das plantas. O milho apresentou maior produtividade com o uso de adubo organomineral em plantio e cobertura.