Relevance and methods. The article assesses the effectiveness of the use of herbal feed additives "Zigbir" (which is positioned as a plant hepatoprotector) on the cows diets in the second half of lactation, how it influence on the digestibility of dietary nutrients, on hfhematological composition of blood serum, on productivity and quality of milk.

Results. As a result of research experiment, it was found that the introduction of herbal feed additives into the diet had a positive effect on the digestibility coefficients. So, the concentration of total protein at the end of the period, in the experimental group increased by 5.34 g/l and came into compliance with the physiological norm, the digestibility of organic matter, of crude fat and of nitrogen-free extractives in the experimental group increased by 2.2%, 1.6% and 1.0%, respectively. Although the decrease in the digestibility coefficient of crude fiber by the end of the period occurred in both groups, however, the dynamics of its value in the experimental group was on 3.5% less than the value in the control. The use of the feed additives "Zigbir" in the diet made it possible to bring the indicator of urea concentration closer to the physiological norm, the blood glucose increased by 46.4% and came into line with the norm. The dynamic change of bilirubin in the test groups blood was not as significant as in the control group, the total bilirubin decreased by only 15%, against 36% in animals in the control group. The decrease in milk yield due to the attenuation of lactation in the test group was slower relative to the control group and was lower by 0,6l, the mass of fat share and of protein in the cows milk from the test group was higher by 0.4% and 0.2%, respectively.

This article presents materials on the determination of residual amounts of fluoroquinolones in milk by using immunohistochemical technology. The method is specific and highly sensitive to fluoroquinolones (0.78 mcg / l of milk).

The results of studies showed that the use of "Prodactiv Acid Se" helped to reduce the negative impact of anthropogenic pollutants, which allowed to reduce the content of heavy metals in various organs and tissues to established MPC. However, it should be noted that quail slaughter products comply with safety indicators and can be used without restrictions.

Relevance and methods. In the summer period heat stress becomes one of the most serious problems of industrial poultry farming. At its core heat stress is an imbalance between the flow of heat from the environment and the release of energy by the bird's body. This pathology brings tangible economic losses and can cause a massive mortality of the poultry. The article describes a set of measures to minimize the negative impact of extremely high ambient temperatures on the poultry.

Results. To deal with the negative effects of heat stress, it was proposed to lower the pH of drinking water by adding the Complicid’s organic complex of acids, and to increase the concentration of nutrients in the poultry diet it was recommended to carry out medication with Libecrin and Butacyfol.

Relevance. The work is devoted to the results of bacteriological studies in articular pathology in broiler chickens and conducting production experience to obtain higher production indicators compared with the use of the approved antibacterial treatment regimen at the enterprise.

The aim of our research was to develop an empirical treatment regimen for broiler chickens with articular pathology.

Methods. Laboratory research was carried out at the State Scientific Center for Applied Microbiology and Biotechnology, Federal State Budgetary Institution, and production experience on broiler chickens from the Cobb-500 cross was performed at one of the broiler enterprises in the Central Region for the cultivation of poultry meat.

Results. On the basis of laboratory studies, including monitoring and determining the sensitivity of the isolated bacteria to antibacterial drugs, the proposed empirical treatment scheme, including Colikvinol® and Pulmosol® in case of articular pathology of broiler chickens, allowed to obtain higher production indicators compared to the approved treatment regimen at the enterprise .

Relevance. According to the Ministry of Agriculture, for January 1, 2020, 77.0 thousand heads of pedigree Simmental cattle were bred in the Republic of Kazakhstan, including 34.7 thousand cows. In recent years, due to some weakening of the primary zootechnical record keeping in pedigree animal husbandry, conflicting information on the productivity of dairy cattle, including in the Simmental breed, has been observed. In this regard, the relevance of research is to study the real situation of the productivity of dairy cattle, in particular in the population of Simmental cattle.

Methods. In the work, generally accepted zootechnical methods for processing data of the obtained results were used. The average values of the characteristics, standard deviation, coefficient of variation, and the reliability of the difference between the average values were calculated according to existing methods [1, 2], as well as using the Xcel program.

Results. Information obtained from the database of the information-analytical system showed that 8.3 thousand animals from the total recorded livestock of Simmental cattle had complete information on milk yield, fat and protein content in milk, which in turn were attributed to the active part of the population of this breed. The average milk yield of this livestock was 4774 kg, with a fat and protein content in milk of 4.01 and 3.30%, respectively. It was established that animals of the second and third lactation had the highest productivity, while the content of fat and protein in milk for all lactations was stably preserved. The most favorable calving for Simmental cows is the autumn season, as their indicators significantly exceeded the value of animals calving in the spring, summer and winter periods of the year.

Relevance. In modern pig-breeding complexes, manure is processed by separation producing the liquid and solid manure fractions. The complexes also generate other types of organic waste. Testing the process of producing the organic fertilizer based on the solid organic waste of a pig-breeding complex in a drum-type biofermenter.

Material and methods. The processing of a mixture of two types of solid fractions of pig slurry and the waste from mechanical cleaning of grain into an organic fertilizer in a drum-type biofermentation unit was tested. The tested material was produced on the pig-breeding complex with the closed production cycle located in Leningrad Region. The optimization criterion was the temperature of the mixture in the installation. The controlling factors were the aeration frequency, the air supply rate to the biofermenter, and the rotation interval of the drum. Assumed values of the tested factors were: the moisture content of the mixture of 55–65% and the density of the mixture of 400– 600 kg/m³. The standard methods for statistical and experimental data analysis were applied.

Results. Four operation modes of the biofermenter were tested, of which only one allowed to achieve the heating of the mixture above 55 °C and a stable course of the biofermentation process. Under this mode, the aeration rate was 5 min/h; the air supply rate to the biofermenter was 10 m/s; and the drum rotation interval was every 12 hours. The significance of the factors in a multivariate experiment was considered; the mathematical model was analyzed using the steepest ascent method. Considering the identified operation mode, 12 drum-type biofermenters with the working volume of 31.3 m³ each will be needed to process the solid fraction of manure produced on the pig-breeding complex with the animal stock of 107,000 head and the output of the solid fraction of manure of 90 tons per day. A building with a floor area of 1000 m² will be required to place these biofermenters. This area is 113.4 times smaller than the area of the watertight pad for clamps to process the manure by the passive composting technology. Nitrogen emissions will be reduced by 6.3% owing to the intense mineralization of nitrogen in the fermented mixture.

Relevance and methods. The studies were carried out in 2017–2019. on podzolized chernozem in the forest-steppe zone of the European part of Russia on the territory of the Republic of Mordovia. Weather conditions during the years of research varied from humid to extremely arid. Intensive methods of tillage helped to reduce soil moisture before sowing peas.

Results. Compared to direct sowing, humidity decreased by 11–39% in the upper soil layer, by 5–12% in the arable horizon. Productive moisture reserves were lower for plowing and discing than for direct sowing: 21–33% before sowing, and 27–34% in the budding phase. The maximum differences in the reserves of productive moisture between the methods of tillage were noted in 2018 during the phase of pea budding. In the cases with plowing and discing, the moisture content decreased in the horizon of 0–30 cm to critical values of 0–10 mm/ha. Significant differences in pea productivity between options with tillage were revealed only in 2019. The maximum yield was observed on plowing – 5.54 t/ha, the minimum on the option with direct sowing — 5.54 t/ha. Under drought conditions, maximum yields were observed in the variant with direct sowing of pea seeds.

Relevance. Broomrape (Orobanche cumana Wallr.) is one of the major limitations in sunflower production in most countries, cultivating it.

Results. The analysis of the racial belonging of broomrape seeds collected in 2019 from different fields of the Rostov, Voronezh, Belgorod regions and the Krasnodar Territory of the Russian Federation showed their marked heterogeneity in virulence. In these regions, there are still fields where race E dominates, but with an admixture of highly virulent biotype G. There are fields with domination race F or G. Of the 7 samples of broomrape seeds collected in the Rostov region, three showed the presence of race H, as well as all samples from the Voronezh region and one from the Krasnodar Territory. n the samples of seeds from the Belgorod region, race H was not detected. Monitoring of the racial belonging of broomrape seeds from different fields is still relevant for their use in sunflower breeding for immunity and proper placement of a cultivated assortment that can slow down the race formation in a particular field.

Relevance and methods. The article presents the results of studies conducted at the Yakutsk Research Institute of Agriculture. Scientific research on the study of promising new forage crops was carried out on site 30 "A" (on the basis of the forage production laboratory of the YANIISKh) on the second floodplain terrace of the river. Lena in 2016–2018. The effect of three sowing dates on the yield of promising annual fodder crops is studied.

Results. The results of studies on the growth, development, productivity, nutritional value of promising annual crops are presented. Productivity in three sowing periods during the harvesting period of sunflower reached feed units 1.2– 2.7 t/ha, crude protein — 2.5–5.1 t/ha, corn — feed units 0.7–2.2 t/ha, crude protein — 2.8–6.9 t /ha, oilseed radish feed units 1.1–1.3 t/ha, crude protein 3.3–5.0 t/ha. The optimal sowing and harvesting dates of promising annual fodder crops for the production of high-quality succulent and voluminous feeds are established — 1 term (sowing — I decade of June, harvesting — II decade of August); 2 term (sowing — the 2nd decade of June, harvesting — the 3rd decade of August) in the phase of mass flowering and discarding panicles of the tested feed crops.

Relevance and methods. In the conditions of southern mid-Siberia, biological features and seed productivity of 26 biotypes of the nursery of the initial material of the Psathyrostachys juncea (Russian wildrye) of 2015 sowing are presented. The work was carried out in accordance with the methodological guidelines on the selection of fodder crops and the methodology of the State Commission for Crop Testing and Statistical Data Processing — using the package of application programs "Snedecor," and B.A. Dospehova (1985), in the Excel program.

Results. Phenological observations made it possible to determine the period of passage of the phases of development of samples of the slice collector from sprouts to caking, exit into the tube and shingling. The greatest stability of uniform growth from the period of spring growth to colossal is observed in biotype — K 12. Quick-ripe biotypes K 1, K 4, K 5, K 9, K 12, K 16, K 24 period from the beginning of vegetation to seed ripening is 65–75 days. Biotypes K 1, K 3, K 5, K 12, K 18 are noted by number of productive stems, length of colos, weight of seeds from 1 plant.

Relevance and methods. The information on the influence of samples of chickpea sorts, time of planting the lines of chickpeas on seed infection with ascochytosis and on the weight of grain on one plant bush is presented in this article. Samples of chickpea sorts and lines were studied during the first sowing period — the first decade of March and the second sowing period — the third decade of March. Ascochytosis infection was evaluated in natural field conditions. The study was conducted at the Central Experimental Station of the Galaaral Research Institute of Grain and Leguminous Crops in 2015–2017 in Uzbekistan.

Results. According to the three-year study, it was found that in the years when there was a lot of precipitation days, sorts Yulduz, ILC 263 and MП 2015/1 of the lines during the first sowing were determined to be infected with acochytosis up to 6 points. During the first sowing period of this cv., there was a decrease in the weight of grains on one plant bush compared to the second sowing period. Cv. ILC 3279, Umid and line 14442 were found to be virtually undamaged in natural field conditions with ascohitosis during both planting periods. It wasfound our that the weight of cv. Мustaqillik-20, line 14442 grain on one plant bush remained high during both planting periods.

Relevance. Research is devoted to increasing the horizontal, polygenic resistance of table carrots of the Surazhevskaya variety to Fusarium sp. and Alternaria sp. infections. The aim of the research was to conduct sequential (at different stages of development) and multiple (over several reproductive generations) individual selections of table carrot plants resistant to a complex of pathogens using traditional phytopathological methods.

Methods. The research was carried out in 2011–2019 in the Department of breeding and seed production in the laboratory of root crops and onions of the All-Russian Scientific Research Institute of Vegetable Growing — Branch of the FSBSI Federal Scientific Vegetable Center. The source material for research was a variety of carrots in the Surazhevskaya dining room, obtained in 2006 from the Flakke variety type. Assessment for resistance to Fusarium sp. and Alternaria sp. it was performed in the field, on two artificial infectious sites and in the laboratory in accordance with the methods. The correspondence (significance of differences) between the compared series (families) in the frequency distribution of the corresponding average scores of disease manifestations was assessed using the χ 2 criterion.

Results. With each subsequent selection cycle, not only did the number of relatively resistant plants increase, but the average score of the lesion also decreased. As a result of four consecutive selection cycles at different stages of ontogenesis and in three nurseries with natural and artificial infection, the selection population changed in terms of resistance to Fusarium sp. and Alternaria sp. It is advisable to assess susceptibility to pathogenic flora in parallel on the natural and infectious backgrounds. Field assessment and selection of carrot plants should be carried out at different periods of the two-year development cycle, as well as during the storage of Queen root crops.

Relevance and methods. Currently, heterotic hybrids of shallots, which are a crossroads, are grown in large quantities in the republic, as a result of which there is genetic clogging that is harmful to the local gene pool. To stop this process, it is necessary to expand the assortment of shallots, which in different conditions of Azerbaijan gives a high yield of leaves, bulbs and seeds. The studies were conducted in 2016–2019 at the experimental site of the Absheron Experimental Base of the Genetic Resources Institute of ANAS. For onion and seed production, large bulbs were planted on the sunny side of the field on October 20–25 to a depth of 7 cm in loose soil. The size of the plots is 2.5 m², the repetition was three times. The feeding area was 60×15 cm. 2 bulbs were planted in each nest. Plants were watered, depending on weather conditions, at least four times a month.

Results. The most promising food shallots varieties for cultivation and seed growing in Absheron conditions are: Borchalinsky, Krasnodar G-729, Kuban, Shallot-Vansky. Compared to the standard Ismayillinsky local variety, the distinguished varieties had a number of advantages. Varieties Borchalinsky and Krasnodar G-729 were more precocious. Kuban and Shallot — Vansky varieties were distinguished by productivity, the yield of which exceeded the yield of the standard variety by more than three times. Almost the same weight of the bulb of the studied samples was 0.6–1.8 g higher than the weight of one bulb of the standard variety. Studies have shown that the average number of arrows in the standard variety and in the Krasnodar G-729 variety was less than in the Borchalinsky, Kuban, and Shallot — Vansky varieties. But the Krasnodar G-729 variety was distinguished by a large number of flowers in the inflorescence, due to which the seed yield from one plant and from the plot was significantly higher than that of other varieties. Based on a four-year study of the shallot collection, the most valuable samples for Absheron conditions were identified and selected agricultural practices, the use of which will produce highly resistant seeds.

Relevance. At present in the region the range of potatoes does not meet modern phytosanitary requirements, there is a decrease in potato yield over a long period of time. [1–6, 14]. Modern biotechnology techniques have undeniable advantages and allow for the early development of potato starting material to determine future crop crossing patterns. Effective implementation of such works is ensured by careful selection of accounts and observations of the growth and development of potato clones.

Methods. The material is potato clones in vitro. The aim of these studies is to study the growth and development of potato plants in vitro in microlonal reproduction.

Results. As a result, the influence of signs of correlation relationships in plants-regenerants of potatoes of 6 varieties (Lubava, Ilinsky, Rodrigo, Handsome, Alvara and Velikan) on the indicators of development of the above-ground part of the plant (height of plants and number of intersections), as well as indicators of rhizogenesis (number and length of roots) was found. Both the positive relationship of the characteristics of the number of intersections, the height of plants, and the negative relationship of the characteristics in potato varieties under in vitro conditions have been established here. With higher plant height, there is a tendency to increase the number of intersections, the biomass of the plant, and the length of the roots in the varieties Handsome, Alvara, Rodrigo. The Great variety did not show a direct relationship between plant height and the mass of leaves, stems. The standard Lubava variety reflected a weakly negative relationship between plant height and root length. The variety Ilinsky did not depend on the height of the plants and the length of the roots, which cannot be noted in the varieties Handsome, Rodrigo and Alvara. According to the selected varieties, the largest correlation coefficient of plant height and root length is observed in Beauty variety (r = 0.69), then in Alvar variety (r = 0.43), Rodrigo variety (r = 0.20). The remaining varieties had a weak correlation.

Relevance. The aim of the research was to determine the physiological characteristics of the manifestation of resistance to stress factors (drought) of new hybrid forms of domestic plum and the allocation of the most drought-resistant in the environmental conditions of southern gardening.

Methods. The article presents the results of drought tolerance studies of six promising hybrid forms of home plum (17–1-55, 17–1-69, 17–2-64, 17–2-78, 17–2-81, 17–3-79), concentrated in the genetic collection of SKFNTSVV. The main indicators characterizing the varieties and hybrids of home plum were determined as drought tolerant — the water content of the leaves and the water holding capacity of the leaves under conditions of summer moisture deficiency.

Results. The water content of leaf tissue of hybrid forms in the hottest period (second — third decade of July) was heterogeneous. The highest water content in tissues was observed in hybrid seedlings 17–2-64 (63.1%) and 17–2-81 (59.6%). The smallest value was observed in the hybrid 17–3-79 and amounted to 49.7%. According to the data obtained, it was concluded that the studied hybrid forms do not differ in high water content, with the exception of hybrid 17–2-64, in which the water content can be characterized as above average. It was found that the water retention capacity of most hybrid forms is average. The total water content after withering in the studied hybrids was more than 80%. The greatest decrease in the amount of water in the leaves was observed in hybrids 17–1-55 (18.9%), 17–2-64 (18.5%), 17–3-79 (18.4%); the smallest — in hybrids 17–1-69 (13.3%), 17–2-78 (13.6%), which indicates a highwater retention capacity of the last two hybrids. With a general assessment of the hybrid fund of home plum, it was found that most hybrids studied have low hydration of leaf tissue and average water retention capacity. Based on this, two drought-resistant hybrid forms were identified: 17–1-69 and 17–2-78, which, despite the low water content, are distinguished by good water-holding ability in comparison with other hybrids and, as a consequence, the conservation of leaf turgor.

Relevance. Selection of columnar apple cultivars and development of adapted elements of their cultivation technology are one of the promising areas of the research work of the Russian Research Institute of Fruit Crop Breeding. The result of 36 years of the target selection work was the creation of 5 columnar apple cultivars accepted in the State Register of breeding achievements: ‘Priokskoye’, ‘Poezia’, ‘Vostorg’, ‘Girlianda’ and ‘Orlovskaya Yesenia’. All cultivars are characterized by high precocity, productivity and immunity to scab. The special habit of the columnar shape of the apple tree determines a special type of planting that is characteristic only for it, providing for super-dense placement of trees.

Results. Our research experimentally demonstrates the possibility of reducing the total number of plants per hectare while maintaining a high density of fruit wood in the orchard. These technologies will significantly reduce the amount of necessary planting material, therefore, reduce the initial cost of laying a columnar apple orchard. Thus, when growing columnar cultivars in the crown of a 3–4-98 semi- dwarf rootstock with a tree planting density of 3333 trees per hectare, the number of columnar branches corresponds to the plantation with a density of 20,000 columnar trees per 1 ha. The study of this technology showed that the cultivars entered fruiting in the third year after grafting of 2-year-old skeletal trees; the yield of the studied columnar cultivars for the first 10 years of fruiting averaged 81.6 t/ ha. Annual fruiting was observed throughout the entire observation period. Another promising option is to grow columns in the form of crowned plants on a dwarf rootstock 62–396. The crown on average consists of 5 branches, while the total number of columnar branches reaches 12 500 PCs/ha. The proportion of trees that entered fruiting in the third year after grafting depended on the depth of seedling planting. For normal planting, it was 28%, which is twice the same value for deep planting (15 cm below the root neck).