Bulletin Samara State Agricultural Academy最新文献

{"title":"INFLUENCE OF VARIOUS WAYS OF MAIN SOIL TREATMENT ON ENZYMATIC ACTIVITY DURING SPRING BARLEY CULTIVATION IN ZAVOLZHYE FOREST-STEPPE CONDITIONS","authors":"Галина Марковская, G K Markovskaya, Ольга Викторовна Чугунова, O. Chugunova","doi":"10.12737/ARTICLE_5C876154EE3573.06802178","DOIUrl":"https://doi.org/10.12737/ARTICLE_5C876154EE3573.06802178","url":null,"abstract":"The aim of the research is to increase the spring barley productivity via the use of various methods of soil treatment, affecting its enzymatic activity, in conditions of the middle Volga region insufficient moisture. The possibilities of minimizing soil tillage for barley in the forest-steppe of the middle Volga region of the Samara region are consid-ered. The studies were conducted in two crop rotations on the experimental fields of the Samara state agricultural Academy Department of «Agriculture, soil management, agro-chemicals and land registry» Samara state agricul-tural Academy in 2005-2008. The following variants of main soil tillage were studied: 20-22 cm; depth tilling; 10-12 cm; loosening; zero plowing. The average soil samples were taken from the experimental field from all variants of tillage in triplicate during two periods: in the seedlings and after harvesting. Samples were taken from different depths: 0-5 cm, \u00005-10 cm, 10-20 cm and 20-30 cm, crushed and sieved through a metal sieve. Soil-ecological monitoring is aimed at tracking changes occurring in the soil under the influence of various anthropogenic loads. The dependence of the total soil biogenicity on the hydrothermal coefficient (HTC) was revealed. It was found that microbiota was more active in relation to pure steam during the year with a low HTC, as well as during the year with a higher HTC on the background of sideral steam. The mostly spread enzymes characteristic of the vast majority of soil microflora-catalase, invertase, urease – were studied for obtaining better understanding of the total enzymatic activity of the soil. No significant influence of the main treatment methods on the activity of the enzyme catalase and invertase was found, but as for the spread of urease within the soil layers it was revealed: the increase in the activity of the enzyme in the upper soil layer ranging in 0-10 cm and a decrease in its activity with the depth increase was ob-served with the fall of the mechanical load. The use of green manure steam in crop rotation contributed to an in-crease in the number of soil microorganisms and the activity of soil enzymes.","PeriodicalId":393002,"journal":{"name":"Bulletin Samara State Agricultural Academy","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125625757","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":"DYNAMICS OF THE QUALITY OF COW COLOSTRUM DEPENDING ON THE TIME OF THE FIRST MILKING AFTER CALVING","authors":"Лариса Бакаева, L. Bakayeva, С В Карамаев, S. Karamaev, А С Карамаева, A. Karamayeva","doi":"10.12737/ARTICLE_5C8760265E9BE5.80291675","DOIUrl":"https://doi.org/10.12737/ARTICLE_5C8760265E9BE5.80291675","url":null,"abstract":"The aim of the study is to increase the viability of newborn calves and the quality conditions for young-stock breed-ing. Dairy and combined breeds zoned in a climatic area of Central Volga and South Ural were studied. Four ex-perimental groups contained down-calving cows were established: the first group- black and white, the II group – Bestuzhev, III group – Holstein, IV group – Aurshire breeds. After calving the first milking in subgroups was carried out in 30, 60, 90, 120, 150, 180 min., taking the selected average samples of a colostrum for the analysis. It was es-tablished that the first yield colostrum from different breeds selected considerably differs, especially for protein con-tent and its fractions. The Bestuzhev breed surpassed the analogs, respectively by 6.1; 6.6; 0.7%. There is a de-crease of protein portion with time increase to the first milking. The difference amounted to 0.9; 2.6; 0.8; 2.1% in 120 min. in regard to different breeds and in 180 min. – 2.4; 5.2; 2.3; 4.8%. In 180 min in regard to the breed groups es-tablished. Immunoglobulins which form kolostral immunity for calves are very important component among protein fractions. It is established that depending on time of the first milking their content decreases even more considera-bly. \u0000In 120 min. after calving the content of immunoglobulins in a colostrum of cows decreased, respectively by 5.2; 12.9; 7.0; 9.7%, and in 180 min. – on 11.1; 28.9; 14.3; 27.0%. At the same time the quality of Aurshire breed colos-trum approached to the lowest point of physiological norm, black and white – was recognized as incomplete, and Holstein breed – was considered unsuitable for newborns at all.","PeriodicalId":393002,"journal":{"name":"Bulletin Samara State Agricultural Academy","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130025359","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":"INFLUENCE OF DESIGN OPERATING AND TECHNOLOGICAL PARAMETERS OF AUGER-BLADE MIXER ON POWER CONSUMED BY IT","authors":"Николай Хольшев, Nikolai Khol'shev, Виктор Михайлович Мухин, V. Mukhin, Светлана Петрова, S. Petrova","doi":"10.12737/ARTICLE_5C87610E1B12F3.87411856","DOIUrl":"https://doi.org/10.12737/ARTICLE_5C87610E1B12F3.87411856","url":null,"abstract":"The purpose of the study – is the equipment improvement for dry mixing of crumbled feed with substantiation of de-sign and operating parameters. The use of complete feed mixtures is possible only with the use of special techno-logical equipment – feed mixers, producing mixture homogeneity meeting livestock requirements. The costs of pur-chasing, operating and maintaining mixers ultimately affect the cost of livestock production. Accordingly, it is neces-sary to aim efforts at the reduction of these costs. This can be achieved by reducing the specific energy costs for the mixing process, which largely depend on the mixer design, its working parts operation and the efficiency of the mix-ing process and power consumption needed for mixing process. No method of power consumption estimation of mixers with combined working parts according to theoretical studies obtained, having alternating in regard to exe-cution and purpose areas. Power consumption needed for the mixing process is one of the main components of the operating costs for the mixing equipment, ultimately determining the specific energy costs for the mixing process – is one of the important specification of any mixer. The research methodology provided a theoretical basis for the relationship of the mixer parameters on the power consumption during mixing process. Equations for determining the power consumption for the parts were submitted in regard to auger conveyor, the first and the second transport-ing and throwing blades. The expression for determination of power consumption for mixing process from the an-gle of installation mixing and transporting blades, the filling ratio of the mixer and the frequency of rotation of the working parts have been received. The obtained and given expressions allow to determine the power values for the mixing process with an error of no more than 5%, with the values of the studied parameters of the mixer within the boundaries of the experiment.","PeriodicalId":393002,"journal":{"name":"Bulletin Samara State Agricultural Academy","volume":"237 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129543691","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":"THEORETICAL UNDERPINNING OF FIELDS MAPPING AUTOMATION FOR IMPROVEMENT OF THE WAY OF SOIL SAMPLIN","authors":"Сергей Васильев, S. Vasil’ev, Сергей Олегович Машков, S. Mashkov, Павел Крючин, Pavel Kruychin","doi":"10.12737/ARTICLE_5C8760FC39E298.03268212","DOIUrl":"https://doi.org/10.12737/ARTICLE_5C8760FC39E298.03268212","url":null,"abstract":"The study objective – is the improvement of sampling of the soil by automation of field mapping. High labour and time requirements at all stages of performance study is the shortcoming of existing ways of soil sampling. In particu-lar, field mapping is carried out by both ways either geodetic methods and equipment, or Aerial Survey Cartog-raphy, however in all cases the analysis of data and work allotted to make quads in the field is carried out manually. Manual subjective correction of field mapping results is a disadvantage. The soil sampling way offered allows au-tomating this process, i.e. calculation of coordinates of quads, its entry and sampling points for robotics taking into account a field contour form parameters and a coordinate grid positioning, concentration of sampling points, a traffic route of robotic samplers between these points. The area of the field is divided into quads of correct (square or rec-tangular) or wrong (with the bent borders) forms in regard to this method. These quads are at the same time, cells of the coordinate grid put on the map of the field. Its parameters (a step and an azimuth) are set at the beginning of mapping. Coordinates of sampling points of the soil, on each quad, and a trajectory of their location, are determined taking into account a form of the concrete quad by the offered dependences. The offered way of sampling of the soil envisages the use of a special device for its implementation – the robotic sampler taking into account (in the course of mapping) coordinates estimated prior to the work start and its performance automatically. Field mapping and co-ordinates calculation of all critical points is to be carried out on the basis of the developed mathematical depend-ences and technological schemes automatically, using navigation systems of GLONASS or GPS standards.","PeriodicalId":393002,"journal":{"name":"Bulletin Samara State Agricultural Academy","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130883706","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":"INDICATORS OF USE OF MINERAL SUBSTANCES BY LAYING HENS FROM MIXTURE WITH GRAIN SORGO KAMYSHENSKY-75","authors":"Инна Плешакова, I. Pleshakova, Хамидулла Баймишев, K. Baymishev","doi":"10.12737/ARTICLE_5C87609CC04DC3.19227439","DOIUrl":"https://doi.org/10.12737/ARTICLE_5C87609CC04DC3.19227439","url":null,"abstract":"The aim of the study is to increase the production efficiency of the hatching eggs by using the Kamyshenskoye-75 sorghum grain in the layer diet. For research, four groups of laying hens were formed from parent stock of 60 ones each (control, experimental-1, experimental-2, experimental-3). The duration of the scientific and economic study was 52 weeks. The layer diet of the control group was provided by the pedigree producer JV «Svetly». In Layer di-et, grain maize was replaced by sorghum: the first group content – 25.0%; the second group – 50.0%; the third group – 100.0%. The conditions of keeping and feeding of laying hens met the requirements of the parent flock of Hisex Brown. On the basis of the conducted studies, it was established that the balance of nitrogen utilization de-pends on the dose of sorghum grain for experimental layer diet. With sorghum grain in a volume of 50.0% in the layer diet, the balance of nitrogen use was 53.14%, which is more than when using grain sorghum 25.0 and 100.0%, and also exceeds the indicator of the control group by 2.06%. The balance of use of calcium by the control group of laying hens is 0.17% less than in the group with 100% grain maize substitution for sorghum in mixed feed. 50.0% sorghum grain use in mixed feed increases phosphorus performance efficiency by 2.36%, lysine amino ac-ids and methionine compared with the control. Grain maize substitution in mixed feed for the layer hen diet for grain sorghum cultivar Kamyshinsky-75 in the amount of 50.0% increases the nutritional value of mineral and availability of amino acids lysine and methionine.","PeriodicalId":393002,"journal":{"name":"Bulletin Samara State Agricultural Academy","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116855503","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":"INFLUENCE OF STATE HAY WITH BIOLOGICAL CONSERVATIVES ON MILK AND CHEESE QUALITY","authors":"А С Карамаева, A. Karamayeva, С В Карамаев, S. Karamaev, Наталья Соболева, Nataliya V Soboleva","doi":"10.12737/ARTICLE_5C87608C383563.17024954","DOIUrl":"https://doi.org/10.12737/ARTICLE_5C87608C383563.17024954","url":null,"abstract":"The purpose of the study is to improve the property of eastern galega haylage by using verdant grass preservative applicator and biologies. Iit was established that the eastern galega verdant grass, because of the low sugar con-tent, is not good for state hay purchasing due to the of the obtained results. The biological preservative applicators use for state hay purchasing significantly improves the quality of feed. The preservatives use for verdant grass al-lowed to increase the active acidity of the finished feed in the range between 6.3 to 11.2%, the content of lactic acid – \u00000.51-0.84 per cent and to reduce the content of acetic acid by 0.19 and 0.27%, respectively. The proportion of lactic acid in the total volume of organic acids was increased by 13.03-16.88%.The nutritional value of haylage with bio-logical preservative applicants increased due to augment of the dry content by 1.7-3.2%, EKE – by 4.4-11.1%, crude protein – by 4.3-10.1%, digestible protein – by 7.4-14.7%.The coefficient of digestibility in the diet of dry con-tent increased by 1.14-3.19%, crude protein – by 2.14-3.62%, crude fat – by 1.64-4.09%, crude fiber – by 1.74-3.87%, \u0000BEV – by 2.05-4.13%, which is very important for animal feeding. The use of haylage with a preservative in the diet of cows from experimental groups increased the fat content in milk by 0.03-0.08%, protein – by 0.04-0.10%, and casein contained – by 0.07-0.18%. Rennet additive apply helps milk to coagulate faster by 2.3-4.5 min (6.6-12.8%), and decrease losses of dry content with serum by 1.5-3.0%. The dry content mass in the experimental samples of cheese increased by 2.8-4.7%, fat – by 1.6-2.7%, protein – by 0.7-1.6%, the degree of cheese maturity improved. The «Milostan and Loktantra + zeolite» preservatives provide better properties for products produced.","PeriodicalId":393002,"journal":{"name":"Bulletin Samara State Agricultural Academy","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114610038","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":"IMPROVEMENT OF THE CONTENT OF THE DRIGALSKI LACTOSE AGAR NUTRIENT MEDIUM","authors":"Владимир Ермаков, V. Ermakov, Оксана Датченко, O. Datchenko, Юлия Курлыкова, Yuliya Kurlykova","doi":"10.12737/ARTICLE_5C875FF26948F8.09305240","DOIUrl":"https://doi.org/10.12737/ARTICLE_5C875FF26948F8.09305240","url":null,"abstract":"The purpose of the study is to improve the mix formulation of the Drigalski Lactose Agar breeding ground, produced by AppliChem, and aimed at enterobacteria isolation and differentiation. Development of a new mix formulation for the Drigalski Lactose Agar breeding ground, efficient assessment of cultivation of enterobacteria on its improved base and other breeding grounds used in the laboratory practice by the authors was the task of the study. The im-proved agar Drigalsky differential medium with lactose is recommended for cultivation (isolation) of different enter-obacteria of Enterobacteriaceae family.Differentiation of enterobacteria on improved medium is carried out accord-ing to their ability to ferment lactose, mannitol, glucose, sucrose, gelatin and form hydrogen sulfide. The medium can also be used for sanitary and microbiological examination of environmental objects.The medium can be used also to conduct the ONPG test. The efficiency of cultivation of enterobacteria isolated from various animal species on the most frequently used differential diagnostic medium, including new formulation of the Drigalski Lactose Agar, ranged from 16.28 ± 1.44 to 42.18 ± 4.12 hours. Enterobacteria isolated from farm and wild animals formed colo-nies on improved Drygalsky agar with lactose during 24 hours, and enterobacteria isolated from zoo animals within \u000025-31 hours.","PeriodicalId":393002,"journal":{"name":"Bulletin Samara State Agricultural Academy","volume":"249 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132657569","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":"DETERMINATION OF AUGER-BLADE MIXER RATIONAL PARAMETERS","authors":"Николай Хольшев, Nikolai Khol'shev, Виктор Михайлович Мухин, V. Mukhin, Светлана Петрова, S. Petrova","doi":"10.12737/ARTICLE_5C87612E571C94.86522501","DOIUrl":"https://doi.org/10.12737/ARTICLE_5C87612E571C94.86522501","url":null,"abstract":"The purpose of the study is to improve the equipment for mixing dry crumbled feed with regard to the basic opera-tion condition or parameters. As a result of the issue analysis and the existing mixers structure, it was found that many machines used for the preparation of compound feeds are complex in the structure and not reliable in opera-tion, the feed mixture quality does not always meet the zootechnical requirements; the applied standard and exper-imental mixers of compound feeds because of imperfection of technological process and working parts contained, possess high specific power consumption. The construction of a universal low-speed batch mixer with a fixed rec-tangular case and combined two forcibly mixing working parts mounted horizontally is an advanced study direction for feed mixers improving. The study objectives incorporated the development of structural and technological speci-fication of a low-speed auger-blade mixer of batch action; the assessment of the impact of design parameters above mentioned of the mixer on its performance; to identify the rational structural and operating specification of the auger-blade mixer taking into consideration the cycle duration time. The research methodology provided the theo-retical justification of specification of the mixer taking into account the cycle duration period of the blending. Ex-pressions to determine the performance efficiency along the following stages were provided: involving auger con-veyor, the first and the second mixing transporting and throwing blades. Formulas are obtained for estimation the cycle period from the installation angle of the mixing-transporting blades and the rotation frequency of the working parts. Data obtained and given for estimation the cycle time from the installation angle of the mixing-transporting blades and the speed of the working parts allow to operate during the minimum cycle time, that is, to choose the op-timal angle of installation of the blades and the speed of rotation of the working parts.","PeriodicalId":393002,"journal":{"name":"Bulletin Samara State Agricultural Academy","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127441969","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":"SOIL STRUCTURE AND HARDNESS CHANGE RESULTING FROM THE DEPTH OF A TRACTOR TRACK UNDER DIFFERENT WHEEL DRIVE TOWING STRENGTH","authors":"Олег Черников, O. Chernikov, Александр Быченин, A. Bychenin, Дмитрий Алексеевич Сазонов, D. Sazonov","doi":"10.12737/ARTICLE_5C8761434AB4C1.18986391","DOIUrl":"https://doi.org/10.12737/ARTICLE_5C8761434AB4C1.18986391","url":null,"abstract":"The aim of the research is to reduce the influence of wheel propellers on the structure and hardness of the soil in the track of the tractor. The technique and results of the study of the impact of the drive wheels of the power tool of the machine-tractor unit (MTA) on the structure and hardness of the soil in the layers of the horizon are presented. The influence of slipping on these indicators is revealed. The research has been of MTA consisting of a tractor of drawbar category 0,6 kN (T-25A) and trailed cultivator KPS-4,0. The method of investigation involved the determination of changes in the structural composition of the soil (DS parameter,%) by the number of erosion-hazardous (less than 0.25 mm in size) particles, as well as soil hardness (DN parameter, kg/cm2) on the track of the tractor in different layers of the horizon (0...50 mm; 50...100 mm; 100...150 mm; 150...200 mm and 200...250 mm). The slipping mode was changed by changing the number of working sections of the cultivator. The slipping of the driving wheels was taken into account, as well as the agronomic background. The studies were carried out in conditions of equal humidity. The speed of MTA, its weight and the air pressure in the tires of the drive wheels is maintained constant. It is established that the greatest change in the structure of the soil on the layers of the horizon is exposed when slipping δ=20...30%. To change the hardness of this range is also the least favorable. The obtained dependences of the structure and hardness of the soil on the layers of the horizon from slipping allow us to recognize the rational modes of MTA work, in which \u0000the slipping of the propelling power means is in the range of 9 to 12% regardless of \u0000from the soil fertility. Slipping over 12% leads to a sharp increase in the soil structure of the number of erosion-hazardous particles, as well as an increase in the hardness of the soil in the track of the tractor in 3,4 ... 3,7 times in the layer depth of 50 ... 100 mm.","PeriodicalId":393002,"journal":{"name":"Bulletin Samara State Agricultural Academy","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126324071","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":"ANALYTICAL DESCRIPTION OF THE MIXER PERFORMANCE FOR BULK MATERIALS WITH SCREW BLADES","authors":"Марина Борисова, M. Borisova, Владимир Новиков, V. Novikov, Владимир Коновалов, V. Konovalov","doi":"10.12737/ARTICLE_5C8760AE15A181.63118871","DOIUrl":"https://doi.org/10.12737/ARTICLE_5C8760AE15A181.63118871","url":null,"abstract":"The aim of the study is to reduce the energy consumption of the blade mixer for bulk materials in regard to its de-sign parameters. Preparation of feed mixtures is carried out mainly by mixers of various designs, as well as extrud-ers and other auger equipment. Widespread horizontal mixers with blades mounted on a rotating shaft are wide-spread and used. They are distinguished by the ability to achieve the necessary smooth mixture within short oper-ating time. The main purpose of the proposed mixer is the preparation of dry mixtures of bulk feed components. The intended use of the mixer is the preparation of concentrated animal feed n agricultural production. In Samara SAA, the design of the blade mixer with screw blades was developed based on the literature review and analysis of the technological process of mixers. The mixer consists of a body with a horizontal shaft with radial trapezoidal screw blades. The proposed blades allow to direct forces in such a way that the total (resulting) projection of the resistant force of the material along the shaft will tend to zero due to the changing angle of the profile and width of the blades. At the same time, an axial force will be created at the edge of the blade at a certain radius, which facili-tates to unload mixer through the discharge opening. The expressions of specific energy consumption for mixing, as well as the work duration of the mixer cycle are given. An expression allowing estimation of an average flow rate of bulk material from the discharge opening of the mixer is obtained. It is established that the position of the gate regulating the area of the discharge opening can affect the volume of the portion simultaneously processed by the mixer, filling volume of mixer and the quality of the mixture.","PeriodicalId":393002,"journal":{"name":"Bulletin Samara State Agricultural Academy","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125281695","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}