NEWS
NEWS OF AGRARIAN SECTOR
ZOOTECHNICS AND VETERINARY SCIENCE. VETERINARY PHARMACOLOGY
Relevance. Lumpy skin disease of cattle is a viral disease that causes significant economic damage to dairy and beef cattle breeding. The basis of its prevention is the vaccination of animals. The use of vaccines, on the one hand, allows you to control the spread of the disease, on the other hand, cause various complications in animals in the form of embryonic death and abortion. To increase the effectiveness of animal vaccination, the use of immunostimulants is recommended, one of which may be a specific transfer factor. The transfer factor is a complex of simple and complex proteins that are able to sensitize the cells of the animal’s immune system to the antigen, accelerate the immunological response and prolong the effect of the vaccine, according to some data, up to one year. Its effect in vaccinating animals against lumpy skin disease has not been studied. The aim of the work was to evaluate the impact of a specific transfer factor on some indicators of the clinical status of animals during their vaccination against lumpy skin disease. The study found that vaccination of animals does not lead to an increase in body temperature above the physiological norm, viral antigens are not excreted through the genital tract of females.
Methodology. Vaccination of animals leads to impaired liver function. This is manifested by an increase in the activity of alkaline phosphatase by 6%, in the content of bilirubin — by 39.3%, of cholesterol — by 19.9%.
Results. The use simultaneously with vaccinations of the transfer factor and the drug Isidivit, which has a hepatoprotective effect due to the content of vitamin E, can reduce the toxic effect of the vaccine on the liver. The activity of alkaline phosphatase compared with the initial value decreases by 15.1%, the content of bilirubin increased by only 8.4%, and the cholesterol content decreased by 5.5%.
Relevance. In recent years, the problems of arthrology have become more relevant among domestic and farm animals. The significance of the article is due to the fact that in the Russian market of veterinary drugs, there is obviously a small number of drugs for the treatment of various pathologies of the joints, created on the basis of hyaluronic acid.
Methods. 32 dogs of different sexes and breeds aged from 8 to 13 years with destructive-degenerative pathologies of the joints were selected for the study. Animals were treated with hyaluronic acid with zinc. Research methods: hematological analysis, general clinical examination.
Results. In the process of drug therapy, in 81.25% of dogs was noted an increase in motor activity. Also, 7 days after the 5th injection of the drug, there was a significant decrease in the manifestations of starting pains up to their complete absence. The main positive changes in the course of arthrosis in dogs, according to all evaluation criteria, reached their maximum manifestation after 3–4th injections and remained practically unchanged by the 5th injection. The results of a biochemical study of blood serum indicate that against the background of the use of the drug in dogs with osteoarthritis, no significant changes were found that characterize the main types of metabolism. According to the results of hematological studies, it can be noted that in dogs receiving therapy with hyaluronic acid with zinc, there is a steady positive trend in a number of hematological parameters. So, a week after the 5th injection of the “Drug” there was a decrease in the total number of platelets. The percentage of eosinophils in the leukocyte formula stabilized to the upper values of the reference range. It is appropriate to emphasize that the “Drug” does not exhibit the properties of an antigen, and has a pronounced anti-inflammatory effect.
ZOOTECHNICS AND VETERINARY SCIENCE. ANIMAL MORPHOLOGY
Relevance. The domestic cat (Felis catus) and the eurasian lynx (Lynx lynx) belong to the same family — feline, predatory order. The cat was domesticated more than 10 thousand years ago. Lynx is the most promising animal for domestication. It is successfully bred in fur farms and, which is no longer uncommon, is kept by private owners as a pet. At the same time, the anatomy of these animals has not been studied to date. This makes it much more difficult to provide medical care and does not allow us to trace changes in organs with intensive anthropogenic impact on the body during domestication. In this regard, the study of the morphology of the eurasian lynx is very relevant and timely. Material for research (11 eurasian lynx corpses) wasobtained in hunting farms of the North-Western region of the Russian Federation. Corpses of a domestic cat (mestizos) were obtained from veterinary clinics of St. Petersburg (15 animals studied).
Methods. A complex of modern and traditional methods was used in the study: fine anatomical dissection, angiorentgenography, computed tomography; production of corrosive and enlightened vascular preparations, morphometry and photographing.
Results. The domestic cat (Felis catus) and the eurasian lynx (Lynx lynx) have significant differences in the topography and branching of the aortic arch and thoracic aorta, despite the close relationship in taxonomy. The eurasian lynx is characterized by the presence of a brachiocephalic trunk and a trunk of common carotid arteries. Similar vascular structures are absent in a domestic cat. For them, the presence of the brachiocephalic artery and the independent departure of the right and left common carotid arteries, without the formation of a common trunk, was established. At the same time, we state that some main arterial transport vessels and their branches in these animals have common principles of location. This pattern has been determined for the vertebral, internal and external thoracic arteries, including their branches of the first order.
ZOOTECHNICS AND VETERINARY SCIENCE. ZOOTECHNICS
Relevance. A significant number of new projects have been implemented in the last decade in the segment of alternative protein sources used as feed or food ingredients. New ventures receive significant investments from the largest global companies and foundations, that believe insect protein has the highest potential of all other sources of protein. In addition to the main reasons for the usage of alternative proteins, which are demographics and climate changes, other reasons include higher nutritional value and sustainability, smaller ecological footprint, more profitable industrial production in comparison to animal husbandry and aquaculture. The purpose of this study is to compare the performance and economic indicators of the most efficient traditional production system for obtaining animal protein, which is poultry farming (in particular, the production of poultry meat breeds of broilers, Gallus gallus) with yellow mealworm (Tenebrio molitor), that is cultivated in the EU mainly to obtain a high-protein ingredient used as an alternative to fishmeal in animal feed and aquaculture, and silkworm (Bombyx mori) which is widely cultivated in Southeast Asia, India, Brazil, but hardly considered in the Russian Federation, US, and EU as an alternative source of animal protein.
Methods. Collection and analysis of public data: information presented in research papers, recommendations from scientific organizations, available commercial information and news publications that help identify data for comparative analysis of production systems. The research methodology is based on a theoretical approach using methods of analysis, induction, deduction, comparison, generalization, and synthesis.
Results. Bombyx mori can be viewed as a preferred alternative to traditional protein sources based on a combination of performance and economic indicators such as productive efficiency, production yield per 1 m2 the of feeding area, number of production cycles per year. According to these indicators, it is comparable or superior to Broiler chicken.
ZOOTECHNICS AND VETERINARY SCIENCE. BREEDING, GENETICS
Relevance. Competent and purposeful work with families and the correct selection of producers for them help to increase the productivity of cows and consolidate the desirable qualities of animals from generation to generation.
Methods. The studies were carried out in the breeding reproducer of Andrianovsky LLC, Bogradsky district of the Republic of Khakassia, where 4 families were formed: Kvitki 9978, Inertia 9516, Zabava 0595 and Silma 0593. We studied the main indicators of the offspring of I, II, III and IV generations: live weight, milk production, conformation, age of the first mating, duration of the service period and intercalving period, reproductive capacity coefficient. Work with families is aimed at increasing and consolidating in the offspring the economically useful qualities inherent in the ancestors by selecting the best line sires for them, their daughters and granddaughters.
Results. Families of cows were formed under the same conditions of feeding and keeping, however, significant differences were noted in the qualitative characteristics of the families. The descendants of Kvitka 9978 are characterized by the highest live weight (average for the family — 575 kg), the descendants of Inertia 9516 have higher milk yield (241 kg), in the same families the offspring have a higher score for conformation (84.0 and 83.6). We recommend using cows of these families to obtain the ancestors of related groups of the Andrianov type of the Hereford breed. The importance of the correct selection of bulls for cows of families is clearly demonstrated by the example of the bull Yasnoy 9069. When selecting this bull for cows of the Inertia 9516 family, the highest indicators of live weight of offspring (645 kg) were obtained, and with the Silma 0593 family — almost the minimum result (560 kg), which indicates the compatibility of individuals, as well as the lines and families as a whole. With the right selection, even in the Silma 0593 family, whose descendants in several generations show almost the lowest rates in live weight and conformation assessment, for example, with the Negus 73 bull, you can get a fairly good result in live weight (590 kg).
ZOOTECHNICS AND VETERINARY SCIENCE. BREEDING, GENETICS
ZOOTECHNICS AND VETERINARY SCIENCE. HISTORY
ZOOTECHNICS AND VETERINARY SCIENCE. EDUCATION AND SCIENCE
AGRICULTURE. PLANT GROWING
Relevance. One of the most important elements of modern agricultural technologies in agriculture is the use of growth regulators on crops. The use of growth regulators is considered as an environmentally friendly and cost-effective way to increase crop productivity, contributing to a more complete realization of the potential of winter wheat.
Methods. Experimental studies were conducted in the experimental fields of the North Caucasus Research Institute of Mountain and Foothill Agriculture of the VNC RAS, which are located in the steppe zone of Mozdoksky district, in 2019-2021. The soils are represented by pre-Caucasian powerful and medium-power carbonate chernozem. Records and observations were carried out according to generally accepted methods described in the “Educational and Methodological guide for conducting research in agronomy”.
Results. As a result of the research, the influence of the studied factors (seeding rate, various doses of growth regulator) on the formation of plant standing density was noted. According to the Homer and Bagrat varieties, the best option is the Edagum CM variant (450 ml/ha), and the optimal seeding rate is 5 mln/ha (Homer variety) and 4 mln/ha (Bagrat variety). The greatest difference between the studied variants was noted in the phases: exit into the tube, earing, milk ripeness. At the end of the spring tillering phase, the height of plants depending on the dose of the growth regulator and the seeding rate (Homer variety) it ranged between 23.1-29.1 cm, in the phase of entering the tube — 40.6-54.3 cm, earing — 64.8-76.2 cm, milk ripeness of grain — 68.3-77.1 cm. The advantage was characterized by a variant of Edagum CM (450 ml/ha) with a seeding rate of 5 mln/ha for both varieties. During the spring tillering phase, the total bushiness for the studied variants (Homer varieties) varied between 1.98-2.69, and for the Bagrat variety — 1.91-2.64. In the later phases of vegetation, the number of shoots begins to decrease, and by milk ripeness, productive bushiness according to the studied variants was from 1.13 to 1.24 (Homer variety) and from 1.06 to 1.21 (Bagrat variety). A positive effect on the bushiness of the drug Edagum CM at a dose of 450 ml/ha was noted.
Relevance. Currently, in Russia, oil flax (Linum usitatissimum L.) crop acreage is increasing, therefore, expansion of the range of varieties and rapid introduction of new, highly adaptive varieties into production are important tasks. Identification methods based on the use of genetic passports are useful both at the stage of studying parent material and when protecting breeders' copyrights. An optimal system for identification should cover evenly the entire genome. Therefore, the purpose of this work is the optimization of the existing marker system for genotyping oil flax varieties from the collection of All-Russian Research Institute of Oil Crops named after V.S. Pustovoit (VNIIMK) by increasing the number of the used polymorphic microsatellite loci. Materials and methods. 17 samples of oil flax from the VNIIMK collection were used as object of the research. Eight pairs of primers flanking the microsatellite loci were used as tools for the research. Localization of the studied primers in the reference genome of L. usitatissimum was determined using the web version of Primer-BLAST. DNA was extracted from two-week-old seedlings with CTAB buffer. The discriminative power of the marker system was determined using parameters such as polymorphic information content (PIC), frequency, the observed and effective number of alleles. Cluster analysis and graphical composition of dendrograms were carried out using Statistica 6.0 software package.
Results. We determined the localization of the studied primers on seven chromosomes. Three pairs of primers were localized simultaneously on two chromosomes. Testing of the primers revealed 6 polymorphic loci. The number of observed alleles per locus ranged from 2 to 3 (average of 2.1 alleles per locus). The effective number of alleles ranged from 1.13 to 1.99 (average value —1.62), and the value of polymorphic information content (PIC) ranged from 0.111 to 0.498 (average value — 0.358). The extension of the set of polymorphic SSR loci allowed the differentiation of all used 17 genotypes.
Relevance. The solution of social problems caused by food production, as well as the creation of jobs in rural populations are the main functional feature of the crop growing industry in the agro-industrial complex. Moreover, grain production per capita in the amount of 1-1.2 t/person is the basis for a prosperous future for Russia. In the emerging market relations, the competitiveness of the products produced is determined by their price and quality. However, not all is well in grain production: it remains extensive, energy-intensive and ecologically unbalanced. To conduct extended reproduction, the level of profitability should be 25-30%. Low and unstable profitability of agriculture, as well as the frequent unpredictability of the volume of government support, create problems in the development of the industry. And the percentage increase in the efficiency of the cultivation of grain crops does not give the desired results. The purpose of the research is to substantiate the method of managing the resource potential of agrolandscapes by mechanical and technological solutions based on the detection of significant soil-climatic factors affecting the yield of grain crops and creating the necessary conditions for a more complete implementation of their genetic potential, which is expressed by the creation of a chain of an additional product that determines the efficiency of the cultivation of grain cultures in Siberia.
Methods. The studies are based on a systematic approach, the methods of the hierarchy and synthesis, methods of mathematical statistics and differential calculus, experimental methods.
Results. For quantitative assessment and accounting of the actions of natural and climatic conditions, an analytical expression is proposed of the possible amount of yield for the cultivation of grain crops. As the control effects, to obtain a given average level of the yield of grain crops (at least 3.0 t/ha) in agrolandscapes, a rational structure recommended for the conditions of Siberia of three levels of intensity of agrotechnologies is proposed: extensive — 31.0%; normal — 49.0%; intense — 20.0%. The algorithm of their synthesis is developed. The proposed methodological approaches and mechanical and technological solutions contribute to a decrease in the “contrast” of the current situation through a rational hierarchical management of the structure of consumed resources in Siberian agrolandscapes to obtain an additional grain product.
AGRICULTURE. CROP PROTECTION
Relevance. The Galega orientalis, growing in one place for many years in a row, accumulates many different diseases and insect pests in its agrobiocenosis and the seed productivity of the crop decreases, so comprehensive protection of crops is relevant.
Methods. The accounting platforms were laid on the experimental field of the Vologda State Agricultural Academy in 2012 on the Gale variety. The soil of the site is sod-slightly podzolic, medium loamy, with a capacity of the arable horizon of 20-22 cm and a humus content of 2.6%. Observations of diseases and pests were carried out during the entire growing season of the Galega orientalis from May to September once a decade. The collection of insect pests was carried out with an entomological net, based on samples in 10 strokes, which corresponded to the density of insects per 1 m2.
Results. Diseases such as peronosporosis, powdery mildew and rust with an average number of 5-9 specimens per 1 m2 were detected on Galega orientalis. The pests were dominated by nodule weevils of the genus Sitona, clover seed eaters of the genus Apion and grass bugs, with a number of more than 10 specimens per 1 m2. The integrated protection of Galega orientalis included weeding of experimental plots from weeds, spraying of crops from diseases in the phase of regrowth of the Galega orientalis with a fungicide — Falcon with a consumption rate of 0.6 l/ha and from pests in the budding phase of the culture — with a microbiological preparation Bitoxibacillin with consumption rates of 2, 3 and 4 kg/ha. A sufficiently high efficiency of the fungicide Falcon, CS (suspension concentrate) with a consumption rate of 0.6 l /ha — 80.9-91.7% — was established. The efficiency of Bitoxibacillin with a consumption rate of 4 kg/ha was 89.5-92.5%.
Relevance. In order to optimize the methods of protecting the plant from the harmful organisms of hemp sowing, it seems significant to assess the effectiveness of modern pesticides and their effect on the physiological processes of plants.
Methods. Studies were conducted on a variety of monoecious hemp of the Central Russian ecotype Nadezhda. The obtained results were analyzed in accordance with methodological recommendations for registration tests of fungicides and insecticides, methodological guidelines for conducting field and vegetation experiments with hemp.
Results. Studies were carried out during 2020-2021 at the experimental field of the Federal Research Center for Bast Fiber Crops the Penza region. The data is presented to assess the influence of insecticidal and fungicidal protectors and spraying hemp insecticide sowing to reduce plant damage to harmful organisms, for morphometric indicators and economic signs. The greatest protective effect of the damage to the hemp flelling was obtained when using tribers of Tabu, VSK + Bunker, VSK on the background of spraying plants insecticide Samurai Super, CE 65%, from the prevalence of root rot. A significant impact on the morphometric indicators ensured the drying with the preparations of Selest Top, CS and Tabu, VSK on the background of spraying by insecticide, as well as the use of them in a combination with a Benorad, WP. Against the background of spraying plants insecticide installed a reliable increase in the control of the yield of stems when processing seed preparations Selest Top, CS + Benorad, WP (2.1 t/ha), seed yields — when using preparations Selest Top, CS + Bunker, VSK (0,13 t/ha); Tabu, VSK + Benorad, WP and Bunker, VSK (0.15 and 0.24 t/ha), on the collection of fibers — when using Tabu, VSK + Bunker, VSK (0.63 t/ha), to collect oil — when drancing the preparations of Selest Top, CS + Bunker, VSK (0.04 t/ha); Tabu, VSK + Benorad, WP and Bunker, VSK (0.05 and 0.08 t/ha).
AGRICULTURE. GENERAL AGRICULTURE
Relevance. The disadvantages of steppe nature management include soil degradation, deficiency of mineral nutrition elements and other adverse phenomena. Similar processes are taking place in Siberia. Currently, the re-development of laylands is beginning and soil degradation is again manifested in the steppe regions of Khakassia. For the effective use of land resources, it is necessary to develop a technology for processing soil deposits in the arid steppe zone of the south of Central Siberia.
Methods. The study of the effectiveness of soil treatment technologies of the erosive agroecological group of laylands was carried out in the arid steppe agrolandscape region of the Republic of Khakassia, located in the south of Central Siberia. The research was carried out for four years in the feed crop rotation link: a long-term (20-25 years) grain-grass layland — oats (corn) for green mass by the method of field experience of B.A. Dospekhov. Methods of water-physical and agrochemical studies were used in the performance of the work.
Results. It is established that on long-term laylands (20-25 years) soil compaction, low moisture content and mineral nutrition elements are noted. The influence of the complex application of continuous herbicides (Tornado 500, Sprut Extra) and processing technology on the water-physical and agrochemical properties of the soil has been revealed. During summer tillage of a long-term layland and introduction of herbicide, there is an accumulation of moisture, nitrate nitrogen. In the arid steppe zone, the technology with tillage of a long-term layland to a depth of 18-20 cm increases the productivity of the feed crop rotation link by an average of 25.5-32.7% compared to technological operations involving small-scale processing (12-14 cm and 14-16 cm).
Relevance. Currently, a number of soil information systems of various levels and directions have been created, the studies on the creation and application of soil databases are represented insufficiently in the Republic of Khakassia today.
Methods. Were carried out by common methods: at-ground soil and geobotanical studies, cartographic method, physical and agrophysical, agrochemical methods of soil researches. For the database creation the Microsoft Access software package was used, which systematized and unified a large amount of experimental data.
Results. Based on the long-term soil research, the database “Agricultural Soils of the foothills of the Western Sayan of Khakassia” with a wide range of soil characteristics for various purposes and uses was formed and registered. The database contains attribute information about the current state of arable and postagrogenic soils in the foothills of the Western Sayan of the Republic of Khakassia. The set of independent materials is presented in the form of tables, queries, forms, reports and catalogues of text files (.docx), photos (.jpeg), which contain information about soil forming factors, soil classification and distribution by natural and climatic zones on the research territory. Currently, the database includes a description of 17 representative soil profiles with an optimal set of indicators, a detailed description of each pedologic horizon, an accurate geographical reference and a digital photography of each reference soil profile. It contains the taxonomic attribute of the dominant and codominant soils in various classification systems (SC RF; WRB, 2006; FAO, 1988). The main information object is the type (subtype) of soil, which includes systematized factors of soil criteria (a list of 18 sets): morphological description of the soil profile, indicators of pedological property, chemical, physico-chemical, agrophysical, hydrophysical and other indicators. The contemporary database with a variety of pedologic properties will serve as a basis for the rational use and protection of soils. Geographical coordinates of soil profiles in the database will allow to display them on the maps of Russia and to put them in the Unified state register of soil resources of Russia.
AGRICULTURE. FRUITGROWING
Relevance. Creation of new varieties with a complex of economically valuable characteristics in the conditions of the Republic of Bashkortostanis relevant. The climatic conditions of the republic require the creation of varieties with high resistance to the complex of biotic and abiotic stressors of the cultivation region.
Materials and methodology. The objects of research are the hybrid fund, selected, promising, elite forms and varieties of black currant of local and foreign selection located in the Kushnarenkovsky breeding center for fruit and berry crops and grapes of the Bashkir Research Institute of the UFIC RAS. Research is carried out according to the program and methodology of selection and variety studies of fruit, berry and nut crops.
Results. A new variety of black currant Estafeta has been created, which has a complex of economically valuable characteristics in the conditions of the Republic of Bashkortostan. According to the results of many years of research, the new variety of black currant Estafeta is resistant to diseases and pests. Over the years of research, leaf damage by anthracnose was 1,0 point (15%), in the control variety — 1,5 points (20%). Damage from grass moth — 2,0 points (30%), in control — 3,0 (40%), from aphids — 0,5 points (10%), in control — 1,0 (20%). New variety Estafeta is large-fruited, with berries of the standard sweet and sour taste. The average and maximum berry weight of 1,6-2,5 g is higher than that of the control of 1,4-2,1 g. According to the content of biologically active substances in black currant berries, the new variety has less sugar than the control, but has more vitamin C and carotene. The bush of the Estafeta variety is medium-sized, medium-spreading. Shoots are medium, straight, light green, slightly pubescent, matte. The buds are medium, oblong, green. The leaves are medium-sized, light green, three-lobed, with small notches. The fruit brush is medium, the berries in the brush are medium. The flowers are medium-sized, with a bright color. The sepals are medium-sized, with a bright color, with an average pubescence of the outer side, arranged horizontally. The berry is large, round-oval, black. The cup is open. The skin is of medium thickness. Pubescence is weak, simple. The peduncle is short, dark green, fleshy. The number of seeds is average. The taste is sweet and sour, refreshing. The timing of budding and the beginning of maturation is average, simultaneous. The period of the beginning of flowering is average. The variety is promising for industrial and amateur gardening. The optimal layout of plantings is 3,0-4,0 х 1,0-2,0 m. The self-fruitfulness of 40-45% is quite good for setting berries in single-grade plantings, although over-pollination with other varieties has a positive effect on the productivity and marketable qualities of berries.
Relevance. The article presents the results of a three-year study of the economic and biological characteristics of the Stanley plum variety (growth and development of plants, the time of fruiting, productivity, yield, marketable qualities of fruits) when grown on medium-sized clonal rootstocks Evrika-99 and Druzhba, bred at the Crimean experimental breeding station named after N.I. Vavilov, in the acutely arid conditions of the Astrakhan region.
Methods.The purpose of the research was to study the influence of medium-sized clonal rootstocks on the production process of the Stanley plum variety in the natural and climatic conditions of the Astrakhan region and to substantiate the possibility of their use for laying intensive plum plantations in the arid conditions of the Northern Caspian Sea.
Results. In the course of the research, the influence of the rootstock genotype on the main indicators of productivity was revealed: precocity, yield, commercial qualities of fruits. The early fruiting of the variety was most influenced by the medium-sized rootstock Evrika-99, on which already in the first year of growth in the garden 60-80% of plum trees were noted to bloom. Among the studied rootstocks, the highest rates of yield increase in the Stanley variety were noted on the medium-sized rootstock Evrika-99, in combination with which the variety was characterized by the maximum values of the average yield of 7.6 t/ha, with the values of this indicator on the rootstock Druzhba — 6.7 t/ha , which is 11.8% higher. According to the marketability of the fruit, the rootstock Druzhba was noted, the average weight of which was 48.2 g, which is 18.1% more than on the stock Eureka-99 (40.8 g). In the extremely dry conditions of the Astrakhan region, the Stanley variety is recommended to be grown in an intensive garden on the rootstocks Evrika-99 and Druzhba, which ensure regular and stable yields.
AGRONOMY. GARDENING
Relevance. Water lilies are recognized as one of the most ornamental plants that play a significant role in the life of reservoirs and rivers.
Methodology. The study of 15 species and varieties of tropical water lilies was carried out in the period 2016-2021 according to generally accepted methods.
Results. It has been established that 40% of water lilies (Nymphaea nouchali var. caerulea, N. lotus, N. lotus var. thermalis, N. rubra, N. capensis cv. Rosea, N. capensis var. alba) are characterized by a long vegetation period, which lasts 313.3±6.1 days. A short vegetation period of 140.6±42.7 days is typical for 60% of water lilies (Nymphaea х daubeniana, N. х daubeniana cv. Panama Pacific, N. х daubeniana cv. Suwahna, N. gigantean, N. gigantean cv. Gug, N. gigantean hybrida 1, N. cv. Mrs. George C. Hitchcock, N. cv. Nangkwaug Champooz, N. cv. Nangkwaug Fax). Depending on the species or variety, the duration of the flowering phase per year is for Nymphaea cv. Nangkwaug Fax, N. cv. Nangkwaug Apsara, N. lotus N. х daubeniana cv. Panama Pacific — 43-95 days, for the rest — 138-302 days. In 67% of species and varieties of water lilies, the sizes of leaf blades and flowers are close to natural and varietal indicators, in 33% the sizes do not match the varietal ones (Nymphaea х daubeniana cv. Panama Pacific, N. х daubeniana cv. Suwahna, N. gigantean cv. Gug, N. cv. Nangkwaug Apsara, N. cv. Nangkwaug Fax), they are 1.0-1.5 times smaller. According to the prospects — MP — unpromising (40%), P — promising (33%), OP — very promising (27%). Unpromising varieties are decorative for 100-130 days. Promising types and varieties of water lilies are decorative throughout the year, which has a positive effect on the perception of indoor compositions.
AGROENGINEERING AND FOOD TECHNOLOGIES. FOOG SYSTEMS
Relevance. The study aimed to develop the composition of an artificial nutrient medium for the rearing of Gallery mellonella larvae. In the process of the research, the relative contributions of the feed component to the biological growth parameters of larvae and their morphological indicators were determined.
Methods. In the experiment the plan 27-4 was used, that is, fractional factor experiments were varied in which seven factors — feed ingredients. The matrix of the complete factor experiment 23 was taken as a basis, and the coefficients in the interaction of three or more factors were assumed to be insignificant and replaced by additional factors. Morphophysiological parameters of larvae were used as the main indicators: mass, length, width of the head capsule.
Results To obtain biomass in the production cycle, the mass of larvae should be at least 0.15 g, length 20-22 mm, width of the head capsule 1.9-2.3 mm (VI-early VII age), survival rate of at least 85%. In the regression equation for larval masses, wheat flour (X1), yeast (X3) and honey (X5) turned out to be significant ingredients. In the regression equation for the length of the larvae, the ingredients that make the maximum contribution are again yeast (X3) and honey (X5). Yeast (X3) was significant for the width of the head capsule. The obtained regression equations enable mathematical modeling within the framework of a linear model represented by regression equations in the studied range of morphological parameters of larvae, depending on the composition of the feed.
AGROENGINEERING AND FOOD TECHNOLOGIES. AGRICULTURAL MANAGEMENT
Relevans. Enterprises of the agri-food sector, distribution chains and other participants of the food market face increasing competitive pressure from the part of transnational companies, which causes the necessity of their adaptation to the changes taking place in the global market environment under the influence of active innovative digital activities of market participants. This article addresses the problem associated with the assessment of innovative potential and the application of innovative approaches to the transformation of Russian companies in the context of globalization and innovative digital development of the world economy.
Methods. The following general scientific methods have been used in the study: situational, complex methods, system approach, as well as tabular, graphical methods, comparative analysis method, index methods, forecasting methods, factor analysis.
Results. In the article, the authors assess the innovative potential of the agri-food sector, distribution chain and Russian economy as a whole, perform comparative analysis and give an evaluation of the innovative potential of the Russian Federation and other countries, regions in the context of the country's involvement in the processes of general, economic, trade, information, communication and innovative globalization, global competitiveness and global trends in the development of innovative digital activity. The article proves the need to bridge the gap in the potential of the internal innovation environment necessary for the development of the agri-food sector and distribution chain by means of creating innovative digital business models based on the implementation of the open innovations concepts. The conclusions based on the results of the study have special importance for theorists and practitioners since they supplement the existing knowledge necessary to substantiate the development strategies of companies and the country's economy as a whole transforming into a global innovative digital environment and increasing their competitiveness.
AGROENGINEERING AND FOOD TECHNOLOGIES. AGRICULTURAL MECHANIZATION
AGROENGINEERING AND FOOD TECHNOLOGIES. CSAL
ISSN 2686-701X (Online)