Agricultural Science Euro-North-East最新文献

{"title":"Productivity of crop rotations with different types of fallow and their effect on the humus content in sod-podzolic soil the Middle Urals","authors":"D. S. Fomin, S. S. Polyakova, D. S. Fomin","doi":"10.30766/2072-9081.2024.25.2.207-215","DOIUrl":"https://doi.org/10.30766/2072-9081.2024.25.2.207-215","url":null,"abstract":"The research was carried out in the conditions of the Perm Region on sod-podzolic heavy loamy soils in a long stationary plot trial, laid down in 1977. The purpose of the research is to study the effect of various types of fallow on crop rotation productivity and humus content in the soil. The data are given for two rotations (2009–2022) of fallow-grain–grass crop rotations with various types of fallow – with manurial, sown with clover, sown with melilot, sideral with clover and sideral with melilot – without mineral fertilizers and with fertilizers (N60P30K60). It was found that in the sown fallows, the mass of root and mowing plant residues of meadow clover and yellow melilot, depending on the nutrition background, reaches 4.08–4.36 t/ha with a nitrogen content of 41.8–46.9 kg/ha, phosphorus 16.7–18.6 kg/ha and potassium 42.7–69.6 kg/ha. In sideral fallow with clover and clover biomass, 6.99–9.04 t/ha and 6.83–8.53 t/ha of dry matter with a content of 133.5–148.1 kg/ha of nitrogen, 34.3–41.2 phosphorus and 121.2–148.9 potassium were supplied to the soil, respectively. The application of organic fertilizers in the fallow field contributed to an increase in the humus content by 0.19 abs.% to the initial (2.04 %) in the variant without mineral fertilizers and by 0.69 abs.% in the variant with the introduction of mineral fertilizers to the initial (2.08 %) Clover sideral fallow also contributed to an increase in the humus content in the soil by – 0.38–0.52 abs.%. There was an increased productivity of crop rotation with sideral melilot fallow (2.22–2.25 t/ha of grain units per year) relative to the traditional crop rotation with pure fallow (2.08–2.11 t/ha of grain units per year). Cultivation of crops in all studied crop rotations was energetically efficient, the energy efficiency coefficient was 3.63...4.48 in the variants without mineral fertilizers, against the background of NRK – 2.38...3.21.","PeriodicalId":504649,"journal":{"name":"Agricultural Science Euro-North-East","volume":"8 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140665526","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Identification of candidate genes associated with growth and development of sheep from a crossbred population using genome-wide association studies","authors":"T. Deniskova, O. Koshkina, S. Petrov, A. Sermyagin, N. Zinovieva","doi":"10.30766/2072-9081.2024.25.2.236-250","DOIUrl":"https://doi.org/10.30766/2072-9081.2024.25.2.236-250","url":null,"abstract":"The article presents the results of a search for genome-wide associations with phenotypic traits characterizing the growth and development of sheep from a crossbred population obtained from crossing Romanov sheep and F1 hybrid rams (Romanov sheep x Katahdin). The phenotype database included ten body measurements (withers height, sacral height, back height, chest depth, chest width, ischial tuberosity width, body length, oblique body length, chest girth, pastern girth) recorded at the age of 6 days, 3, 6 and 9 months. Genotyping of sheep was carried out using high-density DNA chips containing about 600,000 SNP markers. Genome-wide association studies (GWAS) were performed using regression analysis in the STATISTICA 10 program. The search for candidate genes localized in the SNP region was performed using Ensembl genome browser 110. There was carried out an analysis of the matches of the identified SNPs with known quantitative trait loci (QTLs) described in the Sheep Quantitative Trait Locus Database. There were found SNPs that were significantly associated with the studied phenotypic traits overlapped with the QTLs, among which the most common categories were “Body weight (slaughter)”, “Muscle weight in carcass”, “Body weight (live)” and “Bone weight in carcass”. There has been established that SNPs significantly associated with exterior traits were localized within or in the immediate vicinity of 64 genes. There were found potential candidates regulating the growth of muscle (FOXO3, PRKAG3, MYOZ2, and ANKRD1) and cartilage tissues FGF12) and involved in metabolic processes, which were critical for the growth of lambs (CLDN, ALB, and MRC1). Along with the known in sheep functional candidates (CAST and SCD5) , there were identified genes that were not previously described in sheep, but regulated growth and development processes in other livestock species including genes RAB28, PRKAG3 and  FOXO3. The identified SNPs can be recommended for inclusion in marker-guided selection programs in sheep breeding.","PeriodicalId":504649,"journal":{"name":"Agricultural Science Euro-North-East","volume":"59 13","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140661708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A perspective fungicide for protection of narrow-leaved lupin from diseases during the growth season","authors":"L. I. Pimokhova, G. Yagovenko, Zhanna Tsarapneva, N. Misnikova","doi":"10.30766/2072-9081.2024.25.2.19-206","DOIUrl":"https://doi.org/10.30766/2072-9081.2024.25.2.19-206","url":null,"abstract":"The article presents the laboratory and field tests results for the effectiveness of the fungicide Protazox SC (suspension concentrate) against anthracnose and other lupin diseases. The tests have been done in Bryansk region in 2020–2022. The study objects were seedlings and vegetative plants of the narrow-leaved lupin Vityaz variety. The effectiveness of protective and curative properties of the fungicide Protazox SC (azoxistrobine + protioconazole + dipheconazole, 200 + 125 + 60 g/l) was tested for 0.5; 1.0 and 1.5 l/ha consumption rates under laboratory conditions. The biological effectiveness was evaluated according to the number of infected seedlings grown in paper-and-plastic rolls compared to the control variant (fungicide free). The maximal rate of the fungicide – 1.5 l/ha – had the highest biological effectiveness of protective and curative properties (98.7 and 97.4 %); this corresponds to the effectiveness of the reference fungicide Kolosal Pro with the using rate of 0.4 l/ha. In a field test the fungicide Protazox at using rate of 1.5 l/ha was applied for lupin crops at the growing stages of “1-2 pairs of true leaves” and “bud formation” of lupin. The fungicide effectiveness was evaluated compared to the control without treatment. Biological effectiveness of the tested fungicide against anthracnose made 95.8 %, it was 4.5 % higher than of the reference fungicide Kolosal Pro. To the stage of “shiny pod” the number of anthracnose infected pods treated with the fungicide Protazox decreased to 1.5 % compared to 26.5 % in the control variant. Fusarium infection of plants decreased from 24.6 % in the control to 12.0 % in the variant with the fungicide. The spread of gray and white rot on beans decreased by 5.0 and 6.7 times, respectively. The viability of productive plants by the harvesting period increased by 41.3 %. Thanks to the application of the fungicide Protazox SC (1.5 l/ha) the significant narrow-leaved lupin seed yield rise of 0.91 t/ha was obtained (LSD05 = 0.04); the cost recovery was 2.56 rubles.","PeriodicalId":504649,"journal":{"name":"Agricultural Science Euro-North-East","volume":"58 30","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140662036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Productivity and nutritional value of perennial cereal grasses in the Middle Cis-Urals","authors":"N. Kasatkina, Z. Nelyubina","doi":"10.30766/2072-9081.2024.25.2.227-235","DOIUrl":"https://doi.org/10.30766/2072-9081.2024.25.2.227-235","url":null,"abstract":"The purpose of the research was the assessment of feed productivity and nutritional value of 13 new varieties of meadow timothy, meadow fescue and awnless brome when cultivated for green mass in the Middle Cis-Urals. The research was carried out in 2018–2022 on sod-podzolic medium loamy soil of the Udmurt Republic. Meteorological conditions of the growing seasons during the years of the research were different: 2018, 2021 and 2022 were arid (hydrothermal coefficient – 0.89, 0.78 and 0.91, respectively), 2020 – slightly arid (HTC – 1.04), 2019 – waterlogged (HTC – 1.73). The beginning of regrowth of the studied varieties of perennial cereal grasses was noted in the third ten days of April; the grass reached mowing ripeness in 44–60 days. The yield of meadow timothy varieties on average for three years of using the grass stand was at the level of 3.5–3.9 t/ha of dry weight, meadow fescue – 2.3–2.4 t/ha, awnless brome – 4.5–4.7 t/ha. The “year conditions” factor had a primary influence on the variation in yield, density and height of the grass stand – 92.4…97.4 %, 62.9…79.2, 80.3…82.6 %, respectively. The “genotype x year” factor also influenced the number of shoots and their height. Fescue varieties were distinguished by a relatively high content of crude fat (2.5–3.1 %), sugars (15.6–17.7 %), and calcium (0.31–0.36 %). High content of crude fat (2.3–2.6 %), phosphorus (0.68–0.71 %), potassium (2.45–2.52 %), calcium (0.31–0.39 %) noted in plant samples of awnless brome varieties. A positive strong correlation between the yield of dry mass of cereal grasses and the content of phosphorus (r = 0.87…0.96) and potassium (r = 0.69…0.85) in it was revealed. Some varieties of perennial cereal grasses were distinguished by their nutritional value: meadow timothy varieties Sleipnir (Finland), Aturo (Germany) and Tamiza (Germany) with a yield per 1 hectare of metabolic energy of 32.3–34.4 GJ, digestible protein – 0.14–0.16 tons, feed units – 2.41–2.60 thousand; meadow fescue variety Karpatchi (Netherlands) – 21.2 GJ, 0.09 tons, 1.57 thousand; awnless brome variety Gvardeets (Russia) – 35.7 GJ, 0.25 tons and 2.58 thousand, respectively. Cultivation of Karpatchi fescue, Sleipnir timothy and Gvardeets brome is energetically and economically profitable: energy efficiency coefficient – 1.9; 3.0 and 3.6, profitability level – 65; 101 and 161 %, respectively.","PeriodicalId":504649,"journal":{"name":"Agricultural Science Euro-North-East","volume":"57 13","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140662496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The bacterial microbiota of the gastrointestinal tract of dairy cattle: structure, functions, importance (review)","authors":"G. A. Lihodeevsky, P. S. Bogatova, O. E. Lihodeevskaya","doi":"10.30766/2072-9081.2024.25.2.159-171","DOIUrl":"https://doi.org/10.30766/2072-9081.2024.25.2.159-171","url":null,"abstract":"The review presents the generalized material of experimental studies and review works (114 sources, including 110 foreign) on studying the composition of bacterial microbiota of the gastrointestinal tract in cattle depending on age, clinical condition of animals and level of productivity, shows the influence of the functional activity of microbiota on the formation and development of the organism. The microbiota affects the health and productive qualities of dairy cattle. The bacterial community of the gastrointestinal tract plays a crucial role in the digestive system. This complex system with feedback, where on the one hand, the microbiota is influenced by the genotype of the host, feed base, living conditions, breeding methods, and drugs used, and on the other hand, the microbiota primarily affects plastic and energy metabolism, but also indirectly affects respiratory, urinary, central nervous, and immune systems of the body. Bacterial diversity is laid down during the fetal period, undergoes significant changes during calf growth, and remains stable throughout life, adapting to changing conditions. Modern studies of gastrointestinal diseases are increasingly focusing on the composition of the microbial community, pointing to the dangers of antibiotic use and the need for a transition to probiotic and prebiotic therapy. Productive qualities of cows, such as milk yield and fat and protein content, also depend on the composition of the microbiota.","PeriodicalId":504649,"journal":{"name":"Agricultural Science Euro-North-East","volume":"130 44","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140669020","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Variability of broomrape parasitizing on sunflower during its intensive cultivation in the regions of the Russian Federation","authors":"T. Antonova, N. Araslanova, M. Iwebor, S. V. Saukova","doi":"10.30766/2072-9081.2024.25.1.53-61","DOIUrl":"https://doi.org/10.30766/2072-9081.2024.25.1.53-61","url":null,"abstract":"Annual monitoring of broomrape seed infestation of fields over the last 15 years shows that despite the widespread distribution of race G, seeds of other, weaker races E and F remain in many fields. The aim of the research was to identify the racial belonging of broomrape seeds from fields in sunflower-growing regions of the Russian Federation and to describe new botanical characteristics in representatives of the most widespread race G of the parasite. To identify the races, there were used the internationally accepted sunflower differential lines LC 1093, P 96, resistant to races A to F, as well as the original line RG, which is immune to race G and all previous races, hybrid NK Brio (resistant to races A to E) and hybrid Tunka (resistant to races A to G). A highly aggressive parasite biotype (future race H) has so far been identified in small numbers in some fields in the Krasnodar, Stavropol, Rostov, Voronezh, Samara and Orenburg regions. Obviously, the continuation of intensive sunflower cultivation in these fields will lead to a rapid spread of race H in these regions. In addition to the racial diversity, frequent changes in plant habitus (bushy forms) were observed in some representatives of race G. For the first time, there has been demonstrated an overgrowth of the haustorial-tubercle area of the parasite and the formation of multiple stems from a single tubercle. This creates an advantage in the competition for food between adjacent broomrape individuals on the same sunflower root and ultimately accelerates and increases the seed production of the plant. The rapid evolution of Orobanche cumana Wallr. during the intensification of sunflower cultivation is expressed not only in the formation of new physiological races, but also in an accelerated increase in the seed productivity of the parasite by changing the habitus of the plants, including the haustorial-tubercle area.","PeriodicalId":504649,"journal":{"name":"Agricultural Science Euro-North-East","volume":"182 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140417966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Adaptive properties and ecological plasticity of promising lines of spring soft wheat in the conditions of the Central Non-Black Earth Regions of Russia","authors":"T. А. Barkovskaya, O. Gladysheva","doi":"10.30766/2072-9081.2024.25.1.35-42","DOIUrl":"https://doi.org/10.30766/2072-9081.2024.25.1.35-42","url":null,"abstract":"In the conditions of the Ryazan region, adaptive properties and ecological plasticity of 8 breeding lines of spring soft wheat (standard Agatha variety) were studied in 2020–2023 according to the \"yield\" trait using diverse statistical methods. Ecological plasticity (bi), stability (σ2d ), index of environmental conditions (Ij) were determined by S. A. Eberhart, W. A. Russell, variation – by B. A. Dospekhov, stress resistance and genetic flexibility – by A. A. Rossielle, J. Hemblin, index of ecological plasticity – by A. A. Gryaznov, indicator the level of the variety yield stability – according to E. D. Nettevich, homeostaticity (Hom ), breeding value (Sc) – according to V. V. Hangildin, relative stability, stability criterion – according to N. A. Sobolev, multiplicativity (KM) – according to V. A. Dragavtsev. It has been established that the yield level is mostly influenced by the factor \"environment\" – 51.5 %, the contribution of the factor \"genotype\" is 11.5 %. The average yield in the experiment was 5.19 t/ha, favorable conditions in 2022 (Ij = 0.50) allowed the yield to be 17.9 % higher than in 2021 (Ij = -0.52). Lines 2-17 (6.24 t/ha) and 21-17 (6.05 t/ha) had high yields, their genetic flexibility index was 5.58 and 5.41 t/ha, respectively. Lines 1-17, 465-17 and 531-17 had the highest resistance to stress (-0.63, -1.00), they are characterized by high yield stability (σ2d = 0.27–0.65) and the least decrease in it under adverse conditions. Strong responsiveness to changes in environmental conditions was noted for lines 290-17, 2-17 and 21-17: bi – 1.25–1.29, KM – 2.22–2.27. According to the degree of homeostaticity, line 1-17 was distinguished (Sc – 4.63, PUSS – 212, Hom – 18.3), these indicators exceeded the average values by 10.2 %, 81.0 abs. %, 98.9 %, respectively. According to the results of the integrated assessment by the ranking method, breeding lines 1-17; 465-17 and 21-17 showed varying degrees of adaptability, environmental stability, homeostaticity and had a high rating. The lowest rating in terms of the sum of the ranks of adaptability and plasticity parameters was obtained by the standard Agate variety.","PeriodicalId":504649,"journal":{"name":"Agricultural Science Euro-North-East","volume":"121 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140423677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New sources of agronomic traits of spring barley for the conditions of the southern zone of the Central region of the Russian Federation","authors":"O. Levakova","doi":"10.30766/2072-9081.2024.25.1.27-34","DOIUrl":"https://doi.org/10.30766/2072-9081.2024.25.1.27-34","url":null,"abstract":"The purpose of the research is to study a new assortment of spring barley in the conditions of the Ryazan region (southern zone of the Central region of the Russian Federation) and identify sources of agronomic traits for their further use in hybridization. The observation, study and comparison of 11 new varieties of spring barley (standard – Nadezhny) was carried out in 2020–2022 on a natural infectious background (the soil was dark gray forest heavy loamy). It was found that the highest average yield over the years of the research was in the varieties Znatnyy (Russia) – 6.38 t/ha, Ellinor (Germany) – 6.02 t/ha and Kufal (Belarus) – 5.98 t/ha. There were identified low–growing forms - the German varieties KWS Vermont and Ellinor, the height of which was in the range of 63–67 cm and varied little over the years of the research (CV, % = 3.9...6.0). The lowest protein content in the grain was in the German varieties Ellinor (12.31 %), KWS Harris (12.43 %) and the French variety Rapid (12.69 %). In order to improve the quality of forage, a group of high-protein barley was identified: Pamyati Chepeleva (15.31 %) (Russia), Kufal (14.61 %), Znatnyy (14.10 %). According to the length of the ear, the varieties Bente (8.2 cm) (Germany) and Znatnyy (8.0 cm) stood out. It has been established that the varieties of Pamyati Chepeleva and Laureate (Switzerland) have the highest productive bushiness – 4.0 and 4.4. The largest number of grains in the ear was observed in the Znatnyy variety – 23.4 pcs. All the studied source material had high resistance to phytopathogens and lodging. The new varieties identified in the research process are a valuable source material for the development of new highly competitive varieties of spring barley for the conditions of the Central region of Russia.","PeriodicalId":504649,"journal":{"name":"Agricultural Science Euro-North-East","volume":"22 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140420055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Historical and ecological aspects of hydro-reclamation research at the Kirov Meadow-Swamp Experimental Station (to the 105th anniversary of the Station's formation)","authors":"N. Ulanov, A. Ulanov","doi":"10.30766/2072-9081.2024.25.1.7-17","DOIUrl":"https://doi.org/10.30766/2072-9081.2024.25.1.7-17","url":null,"abstract":"The article presents the history of the origin and development of hydromodule research at the Kirov Meadow-Swamp Experimental Station, their practical implementation and ecological significance in the development of the principles of a saving, soil-protective and environment-forming system of agriculture on organic soils in the conditions of the North-East of the European part of the Russian Federation. The main object of long-term research is a typical lowland peatland «Gadovskoye», located on the territory of the Kotelnich peat base of the Kirov region. Special attention is paid to the search for the most effective ways to regulate the water regime of drained swamps used in feed production. It has been established that the most operational, efficient and environmentally friendly method is sluicing, when additional moisture is supplied to the root layer from below. The most optimal range of groundwater regime for annual and perennial forage grasses is shown. The correlation dependence of yield on the degree of drainage of peat deposits is presented. A significant contribution to the reclamation science was made by hydromodule studies on the cutover bogs of the Kirov region. The chemical composition of groundwater and waste swamp waters has been studied on the «Gadovskoye», «Zenginskoye», «Bakhtinskoye», «Pishchalskoye» peatlands, and others, the relationship of the water-physical properties and water regime of the residual deposit with food and temperature regimes, as well as with the coefficient of water consumption of plants and the bearing capacity of the soil of cutover bogs has been established. Agroecological monitoring of the developed peatlands, which have been in culture for more than 40−60 years, shows that during the operation of these facilities there is a gradual decrease in their productivity, due to a decrease in the total agricultural background, partial and even complete violation of the hydrological functions of the drainage network. In order not to completely lose these anthropogenic formations from the sphere of cultural nature management, it is necessary, first of all, periodic repairs of the entire drainage system. Further restructuring within the landscape shell will make it possible to construct fundamentally new post-swamp forest-meadow agroecosystems, where other alternative fields to forage production (hunting, forestry activity, berry-officinal, mushroom, etc.) can be provided.","PeriodicalId":504649,"journal":{"name":"Agricultural Science Euro-North-East","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140420864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Selecting a stirrer and optimizing the process of mixing the substrate in the fermenter of biogas unit","authors":"A. A. Rubcov, D. A. Nemuschenko","doi":"10.30766/2072-9081.2024.25.1.134-150","DOIUrl":"https://doi.org/10.30766/2072-9081.2024.25.1.134-150","url":null,"abstract":"The relevance of the work is related to the problem of soil degradation as a result of pollution by livestock waste and the need for timely disposal of waste into effective organic fertilizer and biogas. Increasing the share of the use of organic fertilizers makes it possible to develop organic farming technologies, and accordingly leads to the production of healthy crop products. The work investigated the process of substrate mixing in the fermenters of an operating pilot biogas plant. The technological line is designed for processing liquid organic waste, mainly manure or litter, by anaerobic digestion to produce innovative environmentally friendly organic fertilizers on an industrial scale. The purpose of the study was to select a stirrer and optimize the conditions for mixing the substrate in the fermenters of a biogas plant. The physicochemical properties of the substrate were studied by laboratory methods. The mathematical model of the mixing process is based on a semi-empirical description of the hydrodynamics of flows in the reactor, modernized taking into account the current state of the issue under the conditions of a fermenter with specific geometric characteristics. As a result of the work carried out, the optimal options for the geometric dimensions of the stirrers were determined (three variants for three-blade stirrers intermittent with a blade angle of 30°, differing in the size of the impeller and rotation speed) and the parameters of the mixing process were calculated. Based on a laboratory experiment and the results of calculating the sedimentation rate, the frequency of turning on the stirrer (once a day) and the time of its continuous operation to homogenize the suspension were determined. The results of the work can be used in the design of mixing devices and substrate mixing modes in bioreactors.","PeriodicalId":504649,"journal":{"name":"Agricultural Science Euro-North-East","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140418176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}