Foothill Zone Research Articles

Productivity of intensive apple orchards in the context of vertical zonality in the North Caucasus

The article presents an analysis of the results of studying the productivity level of intensive espalier -dwarf apple perennial plantations in the context of vertical zonality of horticulture in the Kabardino-Balkarian Republic. The goal of the research is to establish the efficiency of cultivating super-intensive orchards under vertical zonality. Methodology. All experiments were carried out using standard methods generally accepted in the field of fruit growing. The results. It has been established that in terms of productivity in almost all cultivation zones, the best results have been shown by winter-ripening varieties - Golden Delicious, Golden Delicious clone B, Golden Rangers, Granny Smith, Braeburn, Red Delicious Hapke, Fuji Kiku. It has been revealed that the best properties in terms of fruit quality are manifested in the conditions of forest-mountain and foothill ecological zones, where about 90 percent or more of apples are premium and first grade fruits. Calculations on economic efficiency have proven that growing apple trees in forest-mountain and foothill fruit zones is very profitable. Conclusions. In the forestmountain and foothill zones, when developing land plots for super-intensive orchards, it is recommended to plant winter-ripening apple tree seedlings of the following varieties: Granny Smith, Jerome, Fuji Kiku, Early Red Van, Super Chief Sandidge, Golden Rangers. The Early Red Van, Super Chief Sandage, Red Chief Kamspur varieties have a compact tree crown structure, which allows for the establishment of orchards in a compacted pattern with row spacing of up to 0.5...0.7 m. This allows for the rational use of mountain and foothill lands. High-intensity orchards established in the region begin to bear fruit relatively early, providing stable yields of 35...45 t/ha by the 3rd...4th year, with subsequent increases to 50...60 t/ha and more. Thus, the cultivation of high-intensity orchards in the region proves a high level of production profitability and a quick return on investment.

УРОЖАЙНОСТЬ ОТЕЧЕСТВЕННЫХ СОРТОВ КАРТОФЕЛЯ В УСЛОВИЯХ ПРЕДГОРНОЙ ЗОНЫ СЕВЕРНОГО КАВКАЗА

The purpose of research is to identify domestic potato varieties adapted to the soil and climatic conditions of the foothill zone of the North Caucasus, combining high yields with resistance to pests and diseases in comparison with zoned varieties of North Ossetia. The studies were carried out in 2021–2022 at the experimental base of LLC Fat-Agro (Prigorodny District of the Republic of North Ossetia – Alania). The object of the study was 44 potato varieties of domestic selection of different maturity groups. Phenological observations, determination of biometric indicators of plants, quality and quantity of tubers, productivity, statistical processing of yield data were carried out according to generally accepted methods. Phytopathological monitoring of the resistance of potato varieties to the most common diseases was carried out by a visual method, evaluating each plant during periods of full germination at a plant height of 15–20 cm and flowering. The percentage of plants affected by diseases was calculated in relation to the total number. The highest yield on average over two years was obtained for varieties: in early ripe varieties – ZHukovskij rannij (38.3 t/ha), Vzryvnoj (37.7 t/ha), Krepysh (37.7 t/ha), Triumf (37.1 t/ha); mid-season varieties – Azhur (37.6 t/ha), Izyuminka (37.4 t/ha), Sineglazka (36.3 t/ha), Ryabinushka (40.2 t/ha); mid-late varieties – Alaska (42.2 t/ha), Rubin (31.7 t/ha) and Sorokinskiy (32.2 t/ha). All cultivars were resistant to wrinkled mosaic, with the exception of Musinskij (2.2 %), Rubin (7.2 %), Sorokinskij (4.5 %), Alyaska (1.0 %), Grand (1.0 %) ), Krasa Meshchery (1.0 %). The varieties Ariel and Triumf were the most resistant to mottled mosaic. All varieties of potatoes showed a high degree of resistance to late blight on tops and tubers. The manifestation of alternariosis ranged from 1.7 to 11.4 %.

The attractiveness of the city of Barnaul in the assessments of students

The relevance of studying the problem of the attractiveness of the city in the assessments of student youth lies in the need to understand the factors influencing the choice of place of residence and study of the younger generation. In the context of globalization and migration processes, it is important to identify which aspects of the urban environment, infrastructure and social life attract students, as well as what problems they see in their city. Today, the phenomenon of social attractiveness is becoming more and more significant, as individuals begin to form a certain social rating in the system of any interactions, which affects their choice of moving, shopping, etc. For students, the assessment of attractiveness, as a rule, is of particular importance, since many medium-sized cities during the academic year are literally filled with students seeking to get an education or to gain a solid foothold and develop in this area. The study was implemented through a combination of two data collection methods – a mass survey and a focus group. The sample consisted of students from various higher educational institutions of the city of Barnaul (n=212). The sample is based on a system of cluster selection of respondents. The prevailing part of the student youth believes that the assessment of the attractiveness of the city of Barnaul is above average, due to its high geographical attractiveness, combining the advantages of forest-steppe and foothill zones. Social, tourism and innovation components have medium attractiveness, while economic attractiveness is low due to limited career opportunities. However, with efforts at the regional level, it is possible to increase the attractiveness of the city and prevent migration outflow. The overall assessment of the attractiveness of the city of Barnaul is at an above average level. This assessment is predetermined by the fact that there is a high degree of attractiveness within the geographical component. Barnaul combines all the advantages of the forest-steppe zone and the foothill zone, and the combination of these zones makes it possible to offset the disadvantages of aridity as the main criterion of the forest-steppe zone, as well as sharp temperature drops and recurrent frosts.

Comparison between thermal models across the Middle Magdalena Valley, Eastern Cordillera, and Eastern Llanos basins in Colombia

Abstract In this research, we compared thermochronological and traditional one-dimensional thermal models across the Middle Magdalena Valley (MMV), Eastern Cordillera, and Eastern Llanos Basins in Colombia. These models allow us to relate cooling/heating histories to exhumation events, subsidence, fault activities, and fluid flow. The Eastern Cordillera and Eastern Llanos Basins are discriminated as prospective zones for hydrocarbon (HC) generation. The De Armas Syncline at the MMV basin shows high thermal maturity (127°C), describing rocks completely depleted in terms of HC generation. The eastern zone of this syncline is buried until it reaches temperatures above 150°C. The contrast between thermal models in the Eastern Cordillera basin suggests a possible sediment supply scenario from the west to the east of the Soapaga Fault. In the Eastern Llanos basin, the thermal histories between both models explain the latest uplift and sediment supply processes from the hinterland zone of the Eastern Cordillera to the foothill zone of the Eastern Llanos basin. In terms of thermal evolution, the three basins are different, reaching different levels of burial and HC maturity. However, in terms of cooling events related to exhumation, the basins have similarities as they are controlled by the mountain building of the Eastern Cordillera of Colombia.

Use of small-sized units when spreading fertilizers on mountain slopes

BACKGROUND: The results of RD on a laboratory sample of the unit for spreading mineral fertilizers on mountain slopes, which can increase labor productivity and yield rate of mountain forage lands by 15–20%, are presented. AIM: Development of a small–sized laboratory sample of the unit for surface spreading of mineral fertilizers, ensuring accelerated restoration of productive and qualitative functions of natural grass stands of fallow forage lands. METHODS: The technical expertise and testing of the unit and the technology were carried out in the mountainous zone of the Republic of North Ossetia — Alania (Dargava basin, the station of North Caucasian Research Institute of Highland and Piedmont Agriculture) at an altitude of 1540 meters above sea level. The indicators of the test conditions and functional performance of the unit have been determined according to the OST 10.5.1-2000 industry standard. Surface fertilization was carried out according to the OST 10.7.1.-2000. “Testing of agricultural machinery. Machines for applying mineral fertilizers, lime materials and gypsum” industry standard. The study subject was the technology of spreading granular fertilizers, the design of the unit and working bodies: pendulum spreading devices, spreading rates and method of spreading fertilizers. RESULTS: A laboratory sample of the small-sized unit based on the KChG-2.4 cultivator of North Caucasian Research Institute of Highland and Piedmont Agriculture design for surface application of mineral fertilizers has been developed and manufactured. The block module is a hinged frame structure with a tow-lifting device, pendulum spreading tubes and rolling rollers installed on it. The considered motion of the mining unit is across the slope from top to bottom in a shuttle manner with rolling of the sown granules by rolling rollers. The tests were carried out on a rarefied section of the northern slope with a steepness of 13–16° in the area “Sugsadtanrag”. CONCLUSION: The practical application of the small-sized unit for surface spreading of mineral fertilizers with their subsequent rolling in areas in mountainous and foothill zones will ensure a reduction in the degradation processes of slope areas by accelerating the restoration of the quality and quantity of perennial grasses of fallow forage lands.

ASSESSMENT OF THE ECONOMIC EFFICIENCY OF USING ORGANO-MINERAL FERTILIZERS AND GROWTH STIMULANTS IN POTATO FIELDS CULTIVATED IN THE CONDITIONS OF FOOTHILL ZONE

The article presents the results concerning calculations of the economic efficiency of the potato harvest, obtained under the influence of the equivalent amounts of organo-mineral fertilizers and different ways of applying growth-stimulating bio-liquid in the post-forest medium capacity brown soils of the foothill zone of the Republic of Artsakh, in the early-ripening impala variety potato sowings, cultivated under arid conditions. According to economic calculations of the average data of three-year experimental research studies, it was revealed that the highest yield and economic efficiency in potato plantings was provided by the version of fractional application of bio-liquid and organomix norms (bio-liquid 14 l/ha-1 norm to soak the planting material 3 days before sowing, 5 t/ha-1of organomix in sowing and 3 t/ha-1ha norm to be applied with nutrition), which ensured a high-quality potato harvest of 36.47 t/ha-1 and an additional benefit of 2 million 152.6 thousand AMD. At the same time, providing a high compensation for the additional costs incurred, with the results of impact and post-impact per 1 dram spent, a net profit of 3.95 AMD. The above-mentioned version of fertilization was proposed for wide implementation in the region and in agro-zones with similar soil and climatic conditions of the Republic of Armenia.

Resistance of spring durum wheat varieties to stem rust on the background of natural infection

The scientific study presents the results and indicators of the cultivation of spring durum wheat in the world, the main varieties of spring durum wheat in the south-east of Kazakhstan, the development of stem rust on durum wheat varieties (Triticum durum Desf.), data on the stability of varieties in grain-bearing regions of the republic. Field experiments were conducted in the conditions of the foothill zone of the Almaty region in 2022. The object of research was 15 varieties of spring durum wheat of various origins: Gordeiforme 254, Nauryz 2, Nauryz 6, Seymour 17, Milana, Salauat, Zhakut 20 (Kazakh Research Institute of Agriculture and Plant Growing), Altyn dala, Asangali 20, Sharifa (Karabalyk Agricultural Station), Damsinskaya jubileinaya (A.I. Barayev Research and Production Centre for Grain Farming), Bezenchukskaya 182, Kanysh (Russia), Berillo (Italy), Kamillaroi (Australia).Under natural conditions, the manifestation of stem rust (Puccinia graminis f. sp. tritici) on spring durum wheat varieties was late, in the phase of flowering and filling of plant grains. In the experience, many varieties of Kazakh and foreign breeding have shown moderate resistance and susceptibility to the disease. In the varieties Salauat and Zhakut 20, the initial and subsequent development of the disease did not exceed 20%, which is a sign of Slow rust development. With a strong lesion of the Nauryz 2 variety (60%), Gordeyforme 254, Milana, Nauryz 6, Damsinskaya jubileinaya, Altyn Dala, Asangali 20, Berillo and Kamillaroi were moderately susceptible. The Seymour 17, Sharifa and Kanysh varieties showed moderate resistance to stem rust.

Features of growth and meat productivity of Hereford and Kalmyk bull calves

Abstract The purpose of the research is to study the peculiarities of growth and meat productivity of Hereford and Kalmyk bull calves bred in the conditions of the foothill zone of the Central Caucasus. The object of the research were Hereford (group I) and Kalmyk (group II) bull calves. A more complete realization of the genetic growth potential of Hereford cattle took place by the end of the research – at the age of 18 months, when the superiority of animals of this breed over the Kalmyk breed representatives was 22.6 kg (P>0.99). Heavier hot carcasses of Herefords with a difference of 18.8 kg (P>0.99) testified to their greater fullness. As a result of the differences in the mass of the hot carcass and internal fat, the highest slaughter weight and its yield were obtained from representatives of the Hereford breed, who surpassed their peers of the Kalmyk breed in these indicators by an average of 21.4 kg (P>0.99) and 2.8 abs.% (P>0.99), respectively.

ХОЗЯЙСТВЕННО-БИОЛОГИЧЕСКИЕ ПОКАЗАТЕЛИ ПРОДУКТИВНОСТИ РАЗНЫХ ОБРАЗЦОВ АМАРАНТА AMARANTHUS HYPOCHONDRIACUS L. В УСЛОВИЯХ ПРЕДГОРИЙ РСО-АЛАНИЯ

The introduction into cultivation of new plant species that combine not only high yields and nutritional benefits, but also resistance to diseases and pests is an important task for the agricultural industry. The main feature of amaranth is its high performance and active growth, which allows it to be used as a crop with a short growing season, and amaranth also has high seed performance, unlike other traditional crops. The studies were carried out at the experimental site of the Research Institute of Biotechnology of the Federal State Budgetary Institution of Higher Education Gorsky State Agrarian University. The material for the study was collection samples of amaranth, selected in the full flowering phase. Economic and biological indicators of productivity of different samples of amaranth VR-99, K-51, K-61, K-63 of the genus ( Amaranthus hypochondriacus L.) were established. These amaranth samples are mid-season, the growing season of which is on average 125 days. According to biometric indicators, the studied amaranth samples are of medium height, from 157 to 173 cm. On average, the biomass yield of samples K-61 and K-63 was 440-593.4 c/ha, respectively. The yield of amaranth samples ( Amaranthus hypochondriacus L.) K-51, BP-99 was 406-438.9 c/ha, respectively. The dynamics of the assimilating surface area and leaf blade area in the flowering phase for sample VR-99 was 63.75 (thousand m2/g). In the seed ripening phase, the leaf area was 142.8 (thousand m2/g). The total photosynthetic potential of the leaf surface was 2272.05 million m2 day/ha. Amaranth samples of the genus Amaranthus hypochondriacus L. (BP-99, K-51, K-61, K-63), due to their unique properties, are promising for use as a fodder crop, and its inclusion in the agrophytocenosis of the foothill zone of North Ossetia will provide high-quality forage.

Study of the gonadotrophic cycle of Rhipicephalus (Boophilus) annulatus (Say, 1821) (Acari: Ixodidae) in laboratory conditions

The purpose of the research is to determine the physiological characteristics of the single-host tick Rhipicephalus (Boophilus) annulatus depending on environmental factors, including the season of the year.Materials and methods. The study of the gonadotrophic cycle and fertility of B. annulatus was carried out during their seasonal activity from March 2022 to November 2023. The work consisted of two stages: field and laboratory. Ticks were collected manually from cattle in different settlements. Material was collected in natural biotopes according to the generally accepted method using a standard flag and drag. Nourished females were selected for oviposition and kept in laboratory conditions while maintaining optimal temperature and humidity. A total of 1,743 specimens were collected and identified. The sex ratio was 1: 7 with a predominance of females.Results and discussion. The gonadotrophic cycle and reproductive potential of B. annulatus vary by season. In autumn, the oviposition period, taking into account the incubation period, extends to an average of 28 days. The reproductive potential of females varied from 23 to 2194 eggs/ind. In spring, the cycle duration is comparatively shorter and, on average, does not exceed 25 days. Tick fertility can range from 19 to 5503 eggs/ind. which determines their abundance in summer and autumn months. The data obtained confirm the need for acaricidal treatment of animal grazing areas in the foothill zone in late autumn in order to reduce the number of B. annulatus both after winter diapause and throughout the year.

The prevalence of bronchial asthma and chronic bronchitis among adolescents according to the negotiability data depending on the climatic zones in the Republic of Dagestan

The purpose of the study: The purpose of this work was to study the prevalence of bronchial asthma and chronic bronchitis in adolescents, depending on the factors of the ecosystem and climatic zones in the Republic of Dagestan according to the data of the incidence and morbidity. Material and methods of research: We analyzed statistical data on the incidence and incidence of bronchial asthma and chronic bronchitis among adolescents aged 14–18 years for 5 years (2018–2022) in the lowland, mountainous and foothill zones of the Republic of Dagestan according to the Ministry of Health of the Republic of Dagestan. Previously, similar studies have not been conducted in this age group. Results and their discussion: From these data it can be seen that, firstly, in the republic as a whole, the increase in the incidence of bronchial astma in adolescents amounted to 124.4 % (from 0.86 to 1.93 per 1000 population); secondly, a steady increase in the incidence of bronchial astma is observed in rural areas (228 % vs. 53.8 % in cities), thirdly, the incidence has its own characteristics depending on the height of residence above sea level (mountains – more than 1000 m, foothills – 500–1000 m, plain – less than 500 m). A comparative assessment of the data on the prevalence of asthma in cities and rural areas revealed the following patterns: in general, adolescents in villages are almost 2 times less likely to suffer from bronchial asthma than in the city (summary figures for 5 years per 1000 population – in rural areas – 0.96, in urban areas – 1.78). Although the increase in the number of adolescents with bronchial asthma was also noted among urban residents (by 53.8 %), but among rural adolescents the increase in 5 years exceeded 4 times and amounted to 228 % (0.57 in 2018 and 1.86 in 2022). The heterogeneity of the incidence of chronic bronchitis by year was noted in all climatic zones. In the mountainous climatic zone, the incidence in 2018 was 14.7 per 1000, in 2019 there was a slight decrease (10.5), and in subsequent years there was a gradual increase and by 2022 it reached 19.3 per 1000 population. There were no large differences in morbidity in the foothill zone, although in 2022 it decreased to 3.2 compared to other years (6.4 in 2018, 7.2 in 2019, 5.3 in 2020 and 7.0 in 2021). The same situation was observed in the lowland zone, although in general, the incidence rate in this climatic zone increased from 5.5 in 2018 to 7.3 in 2022, with insignificant differences in 2019 (8,6) and 2020 (4,4). Conclusions: Bronchial asthma is a common disease among adolescents in the Republic of Dagestan and there is its close dependence on both climatic zones and ecosystem factors. When comparing the data on the prevalence of bronchial asthma in urban and rural areas, the following patterns were revealed: in general, adolescents in villages are almost 2 times less likely to suffer from bronchial asthma than in the city. Although the increase in the number of adolescents with AD was also noted among urban residents (by 53.8 %), but among rural adolescents the increase in 5 years exceeded 4 times and amounted to 228 %. Regarding chronic bronchitis, heterogeneity of morbidity by year was noted in all climatic zones. In the mountainous and lowland zones, there was an uneven increase in the incidence of chronic bronchitis over the years, and in the foothill zone there was a downward trend. Such differences in morbidity rates can only be explained by the lack of a unified approach to the nomenclature and diagnosis of chronic bronchitis in various medical institutions of the republic.

Биопрепараты как факторы повышения продуктивности сои

Abstract. In 2021–2023, in the forest-steppe zone of North Ossetia – Alania, research was carried out on the use of biological products (growth regulator “Giberelon” and microfertilizer “Ul’tramag Kombi”) on soybean crops of Vilana, Irbis, Vita varieties. The purpose of the work is to improve the technology of soybean cultivation, aimed at improving productivity and grain quality through the use of biological products. Scientific novelty. For the first time in the foothill zone of the republic, the influence of biologics (growth regulator and micronutrients) on photosynthetic activity, the size and quality of soybean crops of various ripeness was studied. Methods. The object of research was three high-yielding soybean varieties - Vilana, Irbis, Vita (breeding of the Federal Research Center of the V. S. Pustovoit Research Institute of Oilseeds). Among the biological products used were "Giberelon" (70 g/ha), a plant growth stimulator based on gibberellic acids; "Ultramag Combi" (2 l/ha) – a concentrated complex micronutrient for leafy top dressing of cereals. Observations and records were carried out according to generally accepted methods of field experience. Results. It has been established that the use of biological products “Giberelon” and “Ul’tramag Kombi” increases the symbiotic activity of soybeans and the amount of fixed nitrogen in the air. During the growing season, the largest number of active nodules were formed in plots where plants were treated with “Ul’tramag Kombi” microfertilizer. With the use of “Ul’tramag Kombi” microfertilizer, the mass of nodules also increased by 18.7–19.9 g compared to the control. The biological products used stimulated plant growth, where the highest plant height was noted for varieties ranging from 79.1–115.1 cm. The yield of soybean crops using the growth regulator “Giberelon” (with an application rate of 70 g/ha) increased by 0.13–0.25 t/ha, with the use of “Ul’tramag Kombi” microfertilizer (with an application rate of 2 l/ha) – by 0.28–0.47 t/ha. The average level of profitability for all studied varieties of experimental variants was 65.25 %, which is 28.75 % higher than the control variants.

Влияние разных садовых конструкций на биохимический состав плодов персика в условиях Крыма

Abstract. The natural and climatic conditions of Crimea make it possible to grow high-quality fruit crops with high marketability of fruits, which are suitable for both processing and fresh consumption. Due to the instability of some environmental factors, as well as global climate change, research is relevant to predict the nutritional value of fruits and the economic effect of growing certain varieties. The article presents the results of a comparative assessment of the accumulation of biochemical active substances in peach fruits (Persica vulgaris (Mill.) variety Redhaven on almond rootstock, growing in the conditions of the foothills of the Crimea. The work was carried out using field research methods with fruit crops. It was established that meteorological conditions and the type of orchard structures influence the content of biochemically active substances in peach fruits, which varied within the following range: vitamin C – 11.7-15.9 mg %; titratable acids – 0.61-1.07 %; sugars – 10.3-13.4 % and dry soluble substances – 9.5-18.0 %. Features of the construction of spindle-shaped and bush crowns contribute to the accumulation of leukoanthocyanins in fruits by 2.6-2.7 times and phenolic compounds by 1.5-1.8 times more than in the fruits of the cup-shaped crown (control, 28 mg/100g and 30.0 mg/100g, respectively). At the same time, it should be noted that the use of orchard structures in denser plantings (1666-2500 trees/ha) contributes to the accumulation of fruits of the best taste according to all biochemical indicators. The factors influencing the content of basic chemicals in fruits when growing peaches without irrigation in the foothill zone of Crimea have been identified. Keywords: peach, fruits, biochemical composition, weather conditions, crown shape, planting scheme, garden structures

Resistance of European plum to fungal diseases in the foothill zone of Adygea

Resistance of European plum to fungal diseases in the foothill zone of Adygea

Sources and donors of the multi-row ear trait for hybrid breeding of corn in the VIR collection

BACKGROUND: The sign of the number of rows of grains on the cob is one of the key to improving the productivity of corn. The effects of the genes that control this trait have been poorly studied. The search for sources and donors of this trait is relevant for hybrid breeding. AIM: The aim of this study is to search for sources and donors of the multi-row ear trait in the VIR collection for involvement in the breeding of hybrid corn. MATERIALS AND METHODS: The studies were carried out on 16 lines (S3–6) with different inbredness and varying the number of rows of grains on an ear from 18 to 36, the exotic 8-row race CUZCO characterized by large grains and the MP-20 population with 20–36 rows of ears. Hybridization and crop recording were carried out in the field conditions of the foothill zone of the Kabardino-Balkarian Republic. RESULTS: Based on similar phenotypic characteristics, 16 lines of corn with a multi-row cob were ranked into 5 groups. Analysis of the structure of the ear of the experimental F1 hybrid between the MP-20 population and the 8-row, large-grain race CUZCO showed that the trait of multi-row ear and large-grain is manifested as incomplete dominance. The yield potential of the experimental simple hybrid was no less than 12.2 tons per 1 hectare with a harvest grain moisture content of 37% and an FAO ripeness group of at least 600. A significant drawback of corn lines with multi-row cobs is the high harvest moisture content of the grain. CONCLUSIONS: The collection of multirow maize lines serves as a valuable source of genes that control important quantitative traits and can be involved in the breeding of hybrid maize for its improvement.

ВЛИЯНИЕ МОЛОЧНОСТИ И ДОЕНИЯ МАТОК НА РОСТ И ПРОДУКТИВНОСТЬ ЯГНЯТ

A shortening of the milking period has a negative effect on lambs, and this effect is more pronounced the earlier the beating is carried out and milking begins, but the growth of young animals is highly dependent on the level of non-dairy nutrition and rearing technology. In this regard, the study of the influence of milking on the quality and productivity of the offspring was carried out taking into account the characteristics of feeding and keeping lambs. The experiment was carried out in 2023 in the foothill zone of the Republic of North Ossetia-Alania on sheep of the Tushino breed. All experimental lambs were divided into two groups: a control group, raised in the usual manner, and an experimental group, whose queens were not milked. All lambs had coarse wool, were kept in the same conditions and were allowed access to the uterus 2 times a day - in the morning and in the evening, but the rest of the time they were kept separately. Milking of sheep on the farm began in early June, that is, when the lambs reached 2.5 months of age. Lambs of both groups were completely weaned at 5 months of age. It was found that the lambs of the experimental group, whose uterus were not milked, grew better and had a greater body weight at the time of lambing than the control group. The difference in body weight was 1.92 kg for rams and 2.42 kg for lambs, in favor of the experimental group. After the start of milking of the queens of the control group, the picture changes. During the third month of life, the absolute increase in the experimental group was 6.07-5.34 kg (little lambs), and in the control group - 4.56-3.69 kg. The lambs spent the fourth month of life on alpine pastures, where the growth of the control group (6.47-5.62 kg) was lower than that of the experimental group (5.87-5.39 kg). The last month of the suckling period is characterized by a significant drop in the growth of lambs in the control group (3.16-2.88). The growth of lambs in the experimental group also decreased (4.83-4.67).

Distribution of heavy metals in the Baksan river from its source to its outlet in the foothill zone

Distribution of heavy metals in the Baksan river from its source to its outlet in the foothill zone

Stages of relief development in the area of the paleolithic site of Ushbulak (East Kazakhstan)

The study was carried out with the support of the Russian Science Foundation № 21-78-10146 “Upper Paleolithic mosaic — cultural and technological variability of stone industries in the foothill zones of northern Central Asia in the second half of the Late Pleistocene” (field work and absolute dating), geomorphological studies were carried out within the framework of the state assignment of the Faculty of Geography of Lomonosov Moscow State University (121040100323-5 and 121051100135-0), Paleogeographic studies are supported by the state assignment of the IG RAS (FMWS-2024-0005).

Effectiveness of use zeolite in vegetable growing in the footdown zone of southeast Kazakhstan

Natural zeolite from the Shankanay deposit is effective for use as an additive to mineral fertilizers when growing vegetable crops in the foothill zone of south-east Kazakhstan. Zeolite added to the soil with mineral fertilizers leads to an increase in the water-physical properties of dark chestnut soil. The water permeability of these options has increased noticeably. The use of zeolite and fertilizers helps to increase the mobile forms of nitrate nitrogen, mobile phosphorus and exchangeable potassium. The addition of zeolite reduces the concentrations of mobile forms of heavy metals in the dark chestnut soil under study. Thus, the concentration of cadmium in the soil in a 0-20 cm layer under sowing table beets when using 2 tons of zeolite decreased by 50% with a control value of 1.0 mg/kg, which does not exceed the maximum permissible concentration.A positive effect of zeolite fertilizer on the productivity of vegetable crops was revealed, which makes it possible to increase the total yield of table beet roots from 42.8 t/ha in control to 43.3-62.7 t/ha in fertilized variants with an increase in yield from 4.4 t/ha up to 19.9 t/ha. The yield of cabbage was 25.7 t/ha on the control, and increased by 6.5-16.5 t/ha on the fertilized variants. The use of zeolite and fertilizers contributes to the production of vegetables with good and high quality indicators. Application of both zeolite and fertilizers increased the dry matter, sugar and vitamin C content of the studied crops. The amount of nitrates in the products decreased with the addition of zeolite and increased in other variants of the experiment, but did not exceed the maximum permissible concentration. Thus, in the control variant, the nitrate content in cabbage heads was 223 mg/kg wet weight, in the variants with zeolite 2t/ha - 205 mg/kg, in beetroots - 248 mg/kg and 195 mg/kg, respectively.

Biocontrol of common scab in potato cultivation

Biocontrol of common scab in potato cultivation