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Sirvi Autor "Sleptsov, Yurii" järgi

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  • Pisipilt
    Kirje
    Changes in the nitrogen compound transformation processes of typical chernozem depending on the tillage systems and fertilizers
    (Estonian Academic Agricultural Society, 2022) Tsyuk, Oleksiy; Tkachenko, Mykola; Butenko, Andrii; Mishchenko, Yurii; Kondratiuk, Iryna; Litvinov, Dmytro; Tsiuk, Yuliia; Sleptsov, Yurii
    The 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.
  • Pisipilt
    Kirje
    Influence of fertilizing and tillage systems on humus content of typical chernozem
    (Estonian Academic Agricultural Society, 2023) Voitovyk, Мykhailo; Butenko, Andrii; Prymak, Іvan; Mishchenko, Yurii; Tkachenko, Mykola; Tsyuk, Оleksii; Panchenko, Оleksandr; Sleptsov, Yurii; Kopylova, Tetiana; Havryliuk, Oleksandr
    The 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.