The impact of multi-year straw and green fertiliser application on grain yields in a grain steam crop rotation

The research proves the advantage of the direction of biological farming using agrocenosis bioresources (straw and green manure) as fertiliser. These studies were carried out in a field stationary experiment of the agrochemical service. Regular application of fertilisers showed a stable tendency to increase grain crop yields. At applying straw with nitrogen for 20 years, the yield increase is reliable 5.0 c/ha (26.8%). The application of green manure fallow on the background of regular application of straw provided an increase in grain yield by 3.6 c/ha (20.6%), which is also significantly higher than the application of straw alone without nitrogen, which provided a steady trend of the average annual increase in yield by 1.1 c/ha (6.3%). Over four rotations (2000-2019) of grain and fallow crop rotation in the conditions of the Tomsk region, there is increasing efficiency of green manure fallow and regular use of straw as a fertiliser. This efficiency leads to the preservation of soil fertility and increased grain crop yields compared with pure fallow. In the first rotation, the grain yield in these variants was at the same level. In the second rotation, the outcome after green manure fallow was higher by 11.7% than after pure fallow. In the third rotation, the yield was 18% higher. In the fourth rotation, the green manure fallow was better than pure fallow in grain yield by 40%. The results were statistically processed by analysis of variance using SNEDEKOR software.

Photosynthetic Activity of Cup Plant Depending on the Method of Seeding

Biological farming throughout the world is becoming a necessity for the production of safe products, and the preservation of fertility and biodiversity. In this direction, there is a significant interest of the scientific community in the perennial culture – cup plant. The cup plant has a wide range of uses in economic activities and due to its high resistance to diseases and pests, the long-term use of its plantations without replanting, and the accumulation of a significant mass of organic matter in the soil, it can be used to expand the species diversity of perennial grasses in the biological farming system. The aim of the study was to examine the influence of the seeding method and seeding rate on photosynthetic activity and dry matter productivity of the cup plant in the forest-steppe conditions of Western Siberia. It was found that with an ordinary method of sowing at a seeding rate of 4 million pcs/ha, the grass stand in the first cut had the highest rates of photosynthetic activity on average over the years of research: the leaf area was 14.8 m2 /m2 , the photosynthetic potential was 4.0 million m2 day/ha and the net productivity of photosynthesis was 2.0 g/m2 ⋅ day. In the second cut, the figures were 8.4 m2 /m2 , 1.9 million m2 day/ha and 2.8 g/m2 ⋅ day, respectively. The optimal density of herbage and active photosynthetic activity in the cup plant using this method of sowing contributed to a significant yield of dry matter of 12.6 t/ha with a high level of PAR absorption of 2.9%. Keywords: cup plant, yield, photosynthesis, sowing method

Influence of farming systems and soil tillage on available moisture stocks of typical black soil in spring wheat crops

Numerous studies by Ukrainian and foreign scientists have shown that one of the limiting factors for obtaining a stable yield of any crop is the reserves of available moisture in the soil, especially in critical periods of plant growth. The article presents the results of research on the impact of three farming systems – industrial (control), ecological and biological and four options for primary soil tillage – plowing by 20–22 cm (control), chiseling by 20–22 cm, disking by 10–12 cm, disking for 6–8 cm on the reserves of productive moisture in the soil for growing spring durum wheat. According to research, it is established that the highest moisture reserves in a meter of soil for the period of sowing wheat was obtained by combining the biological farming system and chisel tillage, which allowed to accumulate in 2018 – 199.1 mm, 2019 – 179.6 and 2020 – 159.9 mm of available moisture in the soil. The use of chisel tillage in combination with industrial and organic farming systems also provides an advantage in all years of observations over plowing combinations and both disking options with these systems. During the growing season, against the background of all studied agricultural systems, use of chiseling and disking provided the highest reserves of available moisture in the soil. However, the best option should be considered a combination of ecological farming system with chiseling by 20–22 cm, which provided for the flowering period in 2018 – 74.0 mm of moisture, 2019 – 93.7 and 2020 – 90.9 mm, and for the harvest period culture, these indicators were, respectively, 61.0, 67.7 and 61.6 mm. The grain yield of spring durum wheat in this variant was significantly the highest in the experiment and was, respectively, 4.6, 6.7 and 5.6 t/ha.

THEORETICAL AND METHODOLOGICAL BASIS OF AGRICULTURAL AREAS PROTECTION IN THE SYSTEM OF BIOLOGICAL FARMING

The aim of the work is to study the possibilities and develop recommendations for the formation of sustainable agricultural land use, primarily in relation to the protection and preservation of agricultural land in the system of biological farming (biofarming). The article characterizes the fundamentals of bio-agriculture, the role in its implementation of the law of soil fertility (Yu. S. Larionov, 2010), which determines a new vision of the theoretical and methodological substantiation of the principles for the formation of sustainable agricultural landscapes. The main result of the research is determined as the system of basic land protection measures, which provides land fertility in the system of biolog-ical farming based on root turnover and regulation of edaphytic and epiphytic processes, and includes: the crop rotation of different root system types on each field; green manuring and mulching; performing agricultural melioration measures, providing additional conditions for interaction of biota and inert matter; saving and collecting of water, as the basic energoinformational component of the agroecosystem in root layer; preservation of the integrity of arable and other soil horizons with living organisms living in them and in adjacent areas (in the biocenosis); biological regulation of the growth and development of cultivated plants to ensure their protection; carrying out biostimulation of the organic residues decomposition processes. This is the main content of the soil protection system of agricultural land, the stable preservation of their fertility in the system of biofarming, which can become the basis of ecologically verified agricultural production in the near future.

POTENTIAL CONTAMINATION OF SOYBEAN AGROPHYTOCENOSIS DEPENDING ON THE SYSTEM OF FARMING AND SOIL TILLAGE

This work presents the results of the study of changes of the potential contamination of soybean agrophytocenosis in grain-row crop rotation by using different systems of farming and typical black soil tillage. It was established that in the upper 0–5 cm layer of soil there are on average 393–671 million pieces of weed seeds. which is 33.6–43.0% of the total number in the layer of soil 0–20 cm. It was established that the use of periodical moldboard and superficial basic soil tillage had no impact on reducing the potential contamination of typical black soil compared to the variant of differentiated tillage. During subsurface plowing the total number of seeds in the soil layer 0–20 cm increased by 13.5–25.8% compared to differentiated tillage. In the variants of ecological and biological farming systems the number of weed seeds in the layer 0–5 cm was 11.3–19.6% higher compared to the intensive farming system. Based on monitoring of the species composition of the weed seeds bank it was established that in the arable layer of the soil the largest share are annual dicotyledonous – 48–62%. annual monocotyledonous – 30.2–44.6%. perennial – 0.9–3.3% of the total number. It was proved that under the intensive system of farming the yield of soybean variety Silesia increased on average from 10.2 to 147% compared to the ecological and biological system of farming. During the biological system of farming soybean yield did not exceed 1.0–1.8 t/ha. Therefore. the industrial and ecological system of farming had the greatest impact on reducing the potential weediness of the soybean agrocenosis during the growing season. During the biological system of farming crop yields decrease due to the accumulation of weed seeds in the topsoil and formation of high actual weediness of the soybean agrocenosis.

Influence of a chemical preparation of triazole50% cs on sowing the winter wheat against rust

The article is focused on the data of the carried works on studying biological efficiency of fungi Triazole 50% on sowing the winter wheat against yellow rust as well as on the height, development and fertility of the wheat. On May 5, 2019 from 9 to 10 o’clock under the temperature 21-23 field experiments of Triazol 50% CS manufactured by the firm “Agroximstar” (Uzbekistan) were carried out on winter wheat as a protector of seeds of winter wheat of Pervitsa sort against the disease of yellow rustin the irrigated conditions in an experimental field of the Institute “Istiklal” of Andijan district of Andijan region. The aim of the given research is to study biological-farming efficiency and determination of optimal norms of preparation expenses and to study the influence of fungicide on the height and development as well as on the fertility of the wheat. The received data showed that the preparation Triazole 50% CS effected on the pathogen of yellow rust favorably and besides that it didn’t effect on seed growth and energy of growth negatively.

Influence of microbial preparations and mineral fertilizers on the yield and quality of winter wheat grain

The use of biological products based on effective strains of microorganisms with a range of useful properties is one of the aspects of biological farming. The long-term field experiments were conducted in the soil and climatic conditions of the Crimea. А positive effect of the combined use of mineral fertilizers (NPK calculated at P30) and pre-sown inoculation of seeds (biopreparation based on L. nimipressuralis CCM 32-3) on the yield and quality of winter wheat grain was shown. The increase in grain productivity of winter wheat by 31 % compared to control (on average for 3 years) and grain quality indicators: protein and gluten – up to 12.5% and 28.0 % (in the control 9.9% and 19.2%, respectively) was revealed.