Biological activity of chernozems typical of different farming practices

Saabunud / Received 21.10.2021 ; Aktsepteeritud / Accepted 07.12.2021 ; Avaldatud veebis / Published online 08.12.2021 ; Vastutav autor / Corresponding author: Andrii Butenko [email protected] study aimed to determine the impact of different farming practices (organic and intensive) on the dynamics of potential biological activity of typical chernozem (mollisol). Comparative-profile-genetic, microbiological and mathematical-statistical methods were used for the research. The data obtained during the study of soil biological activity for 2018–2020 were analyzed. The highest popu-lation density of Collembola was observed in the variant of fallow soil in the layer of 10–20 cm (111 indiv. dm3 –1) with the lowest amount of Oribatida (32 indiv. dm3 –1). Under conditions of agrogenic use of soils, the predominance of Oribatida over Collembola was recorded. When using green manure in a soil layer of 0–10 cm, the number of Oribatida is 125 indiv. dm3 –1, while Collembola – 50 indiv. dm3 –1. Agrogenic use of chernozems reduces the number of microscopic fungi. The intensive farming system is the reason for the decrease in the number of all ecological and trophic groups of microorganisms in the 0–10 cm layer while increasing their number in the layer of 20–30 cm. Variants of the organic system of agriculture, especially with the use of green manure, contribute to the increase in the number of actinomycetes and amylolytic microbiota, as well as a short-term sharp increase in the number of oligonitrophilic microbiota. Agricultural use of soils reduces the activity of enzymes such as invertase, protease, dehydrogenase and cellulase. However, the activity of urease and catalase – increases in the soils of the organic system of agriculture. Discriminant analysis of biological activity identified three groups of soils, corresponding to different farming systems. This confirms the possibility of using the studied indicators for soil biodiagnostics

Effect of seed pre-treatment with plant growth compound regulators on seedling growth under drought stress

Saabunud / Received 28.10.2021 ; Aktsepteeritud / Accepted 10.12.2021 ; Avaldatud veebis / Published online 11.12.2021 ; Vastutav autor / Corresponding author: Andrii Melnyk [email protected] experiment aimed to evaluate the effect of different compound regulators on the germination rate, seedling morphology of two mustard (Brassica juncea L.) cultivars ('Felicia' and 'Prima') under simulated drought stress with PEG-6000. The eight commercial growth compound regulators (ALBIT, VERMISTIMD, ANTISTRESS, AGRINOS, REGOPLAN, BIOFOGE, STIMULATE, and FAST START) were pretreated seeds at recommended doses. The application of growth regulators promoted the growth of seedlings under drought stress but had no obvious effect on the germination rate of the two varieties. The root fresh weight, total root length, leaf area, stem length, and stem volume in 'Felicia' significantly increased with ANTISTRESS treatment by 24.28, 3.30, 24.70, 19.40, and 30.90%. In addition, the number of lateral roots reached the maximum with AGRINOS and REGOPLAN treatment compared with plants without regulators under drought conditions, which were 135.55 and 121.20%, respectively. For 'Prima', the application of FAST START had a remarkable effect on root fresh weight, total root length, lateral root number and primary root length, root surface area, leaf area, and stem volume by 17.62, 18.12, 211.20, 53.75, 28.57, 15.90, and 32.30%, respectively

Factors of increasing alfalfa yield capacity under conditions of the Forest-Steppe

Saabunud / Received 10.02.2021 ; Aktsepteeritud / Accepted 02.06.2021 ; Avaldatud veebis / Published online 02.06.2021 ; Vastutav autor / Corresponding author: Andrii Butenko [email protected] was found that southern ecotype alfalfa (Medicago sativa) of variety 'Angelica' adapted to the soil and climatic conditions of the Forest-Steppe and was not inferior in yielding capacity to variety 'Rosana' which provided maximum indices in the phase of the beginning of budding at sowing rates of 6.0 million pcs ha–1 and ordinary row sowing method with row spacing 12.5 cm. It was discovered that with the increase of alfalfa sowing rate from 4.0 to 8.0 million ha–1 the dry matter content of varieties increased by 0.11–0.20% for sowing with row spacing of 25.0 cm. compared to row spacing of 12.5 cm. (22.62–22.83%). The average crude protein content in variety 'Rosana' was 20.68–21.37 and 'Angelica' 20.67–21.07%. Narrowing of row spacing contributed to an increase in crude protein content by 0.55–0.58%. The highest content NDF and ADF were observed in the second year of alfalfa grass life, respectively 30.72– 34.91 and 23.02–24.60%. During the third year of alfalfa grass usage, the indices decreased to 27.09–33.03 and 19.53–24.18%, respectively. Thus, during three years of life at different geographical origins, alfalfa in the phase of budding provided a stable dry matter output of 27.45–27.81 and crude protein output of 5.86–5.87 t ha–1 for sowing with row spacing of 12.5 cm. and sowing rate of 6.0 million pcs ha–1

Economic efficiency of Camelina sativa growing with nutrition optimization under conditions of Precarpathians of Ukraine

Saabunud / Received 28.09.2021 ; Aktsepteeritud / Accepted 07.12.2021 ; Avaldatud veebis / Published online 08.12.2021 ; Vastutav autor / Corresponding author: Andrii Butenko [email protected] results of research conducted during 2015–2018 in a field experiment on sod-podzolic soils while studying the effect of different fertilizers on productivity of Camelina sativa and oil-bearing crops and, accordingly, economic efficiency and competitiveness of this crop growing have been presented. The dependence of elements of productivity and yielding capacity on the application of mineral fertilizers has been revealed. It has been found that the application of mineral fertilizers had a significant impact on the productivity of Camelina sativa seeds and the cost index and profitability of Camelina sativa seeds, accordingly. Depending on the studied elements in growing technology of little-known in Ukraine crop of Camelina sativa, the main indices of economic efficiency were determined. It has been found that with optimization of plant nutrition, regardless of the increase in cultivation costs, conditionally net profit and profitability level increased. This was facilitated by foliar fertilization with modern restrictive preparations or complex micro fertilizers in critical periods of crop vegetation. Depending on the variant of the experiment, the average conditionally net profit during growing years ranged from 471.78 to 688.48 € ha–1 (1 UAH = 0.032 €), and profitability level ranged from 178.8 to 222.0%

Changes in the nitrogen compound transformation processes of typical chernozem depending on the tillage systems and fertilizers

Saabunud / Received 15.12.2021 ; Aktsepteeritud / Accepted 18.06.2022 ; Avaldatud veebis / Published online 18.06.2022 ; Vastutav autor / Corresponding author: Andrii Butenko ; [email protected] analysis of efficiency’s research of interrelation between soil’s biomass and tillage systems and fertilizers is done. The number of microorganisms responsible for the transformation of nitrogen compounds and their state in typical black soil was studied. There is evidence-based scientific and practical research on the effectiveness of these microbiological processes and the improvement of environmental performance through the various fertilizer systems and soil tillage. The use of an organic-mineral fertilizer system increases the total number of soil microorganisms and exponential mobilization processes, compared to the variant without fertilizers. This pattern is clear in the variants of shelf tillage for row crop rotation. The number of microorganisms that absorb mineral compounds of nitrogen decreased by 24%, bacteria ammonification by 1.5–5.7% compared to plough tillage. The ratio between the number of microorganisms accounted for the nutrient laboratory solutions for organic-mineral fertilizer system, compared to variants without fertilizers, is greater by 20–26% for differentiated and 14–35% for shallow tillage

Economic efficiency of sweet corn growing with nutrition optimization

Saabunud / Received 13.02.2022 ; Aktsepteeritud / Accepted 06.04.2022 ; Avaldatud veebis / Published online 06.04.2022 ; Vastutav autor / Corresponding author: Andrii Butenko ; [email protected] efficiency of sweet corn production for grain has been studied; economic advantages of cultivation in comparison with other crops have been highlighted. The article presents the results of research on issues of improving the economic efficiency of technology elements for growing sweet corn of the variety Moreland F1 under conditions of Precarpathians of Ukraine. Taking into account the production strategy, have been outlined cost-effective resource-saving and intensive technologies which provide the stable yielding capacity of early-ripening hybrid of sweet corn under conditions of Precarpathians at the level of 4.99–6.65 t ha–1 accordingly with the profit of 370–500 € ha–1 and grain production profitability 112–135%. It is established that under the conditions of application of mineral fertilizers at the dose of N135P90K125 + N60 + N30 in two stages the grain yield of corn increases compared to the absolute control (by 2.26 t ha–1, or 30.3%) with increasing costs per 1 ha of sown area 68.23 €, or 26.4%). In proportion to the increase in yield, the amount of profit, which is 192.42 € ha–1, also increased significantly

Effects of drought and rehydration on the growth and physiological characteristics of mustard seedlings

The mustard variety Felicia was used to analyze the response and compensation effects of growth and physiology under drought stress and rehydration conditions at the seedling stage. The seedlings were exposed to different levels of drought stress simulated by polyethylene glycol (PEG). The growth parameters, fresh weight, chlorophyll fluorescence, and antioxidant system were measured. The results showed that drought stress inhibited the growth of roots and shoots and reduced the performance of photosystem II (PS II). After rehydration, the root length and fresh weight of plants rapidly increased, and the performance index (PIABS) was found to be higher compared with the control, which suggested a compensative effect. The chlorophyll content was significantly reduced under moderate and severe drought stress. However, it increased under mild stress conditions. After rehydration, the chlorophyll content under moderate and severe stress did not return to the levels of control, and there was no significant difference between mild stress and the control. Under drought stress, the activities of antioxidant enzymes and content of malondialdehyde (MDA) increased significantly in the leaves. After rehydration, MDA and the activities of antioxidant enzyme were higher than those of the control group, particularly under moderate and severe stress. Therefore, these results suggest that mustard is strongly adapted to mild drought stress through the efficient activities of antioxidant enzymes activity and photosynthesis, as well as its rapid recovery after rehydration

Influence of fertilizing and tillage systems on humus content of typical chernozem

Saabunud / Received 19.04.2023 ; Aktsepteeritud / Accepted 30.06.2023 ; Avaldatud veebis / Published online 15.08.2023 ; Vastutav autor / Corresponding author Andrii Butenko ; [email protected] study aimed to measure the effect of tillage and fertilizing systems in short crop rotation on the content, and сomposition of humuse’s substances in soil’s type as typical chernozem of the zone Forest-Steppe of Ukraine. The highest humus content was determined in the variant with the application of 11.5 t ha–1 of organic fertilizers + N27P38K45 kg ha–1. The humus content in the 0–10 cm layer against the background of shallow tillage without a moldboard was 4.25%, with moaldboard-subsurface tillage – 4.23%. These tillage systems have the most favourable effect on the formation and humus matter (t ha–1). The humus storage in the variant of shallow subsurface tillage was 41.4 t ha–1, i.e. 1.3 t less than in differentiated tillage. The use of soil without fertilizing led to significant humus losses and deterioration of the compound of humus substances due to mineralization processes that prevail over immobilization processes. When applying 11.5 t of organic fertilizers and (N27P38K45) mineral fertilizers per hectare of crop rotation area, the number of humic substances increased significantly and the amount of fulvic acids in the top layer decreased. The ratio of HA (Humic acids) to FA (Fulvic acids) is 2.48. The type of humus formation is humus- fulvatic

Formation of a Study Program in the Context of Conformity with the ESG (on the Material of the Analysis of Study Programs in Ukraine)

The article discusses the issues of forming a study program in the context of the process’ compliance with the recommendations provided by Standards and Guidelines for Quality Assurance in the European Higher Education Area (ESG), which are relevant for Ukrainian higher education. The study achieved its goal: the main prerequisites for the formation of the study program (SP) were analyzed, its structural and semantic parameters were determined, and a step-by-step model of concluding a quality study program in accordance with the ESG guidelines was suggested. The search for the materials on which the study was based was conducted using the following databases: scientometric (Scopus, Web of Science), the information system (online platform) of the National Agency for Quality Assurance in Higher Education (NAQA), and the “Legislation of Ukraine” database. Quantitative methods included an online questionnaire, qualitative methods included system analysis, and other comparative method were used. Due to the contradictions between the interpretations of the concepts at the level of legislation and internal regulations, a definition of the “formation of the study program” concept is suggested. The components of the SP formation process, the resources required for the formation of the quality SP, and an analysis of positive and negative practices from the NAQA accreditation procedure experience, based on which the optimal model of the SP as a dynamic system based on ESG guidelines was developed, which has a functional character and is based on theoretical generalization of the latest approaches and real cases of Ukrainian HEIs, were discussed

Influence of Growth Regulators with Anti–Stress Activity on Productivity Parameters of Sinapis alba L.

The research results of using growth regulators with anti-stress action which stimulated growth and development of plants, and provided them with resistance to adverse factors during the vegetation period, were presented. The use of plant growth regulators with anti–stress effect on Sinapis alba L. increased the plant resistance to adverse environmental influences, providing adaptation to changing environmental conditions, i.e. it has a stress–correcting effect throughout the whole vegetation period. The result of using drugs on mustard (Sinapis alba L.) was obtaining a significant and stable additional seed yield (0.57 t·ha-1), i.e. an increase in yield by 38%. Over the years of research, the most effective were the applications of Fast Start and Biofoge growth regulators. The most effective processing terms were: during the vegetation period as well as combination of seed treatment and application during the vegetation period