Humus condition and nutrients regime of leached chernozem depending on sugar beet fertilization
DOI:
https://doi.org/10.31548/dopovidi2021.05.006Keywords:
black soil, humus, nutrients, fertilizersAbstract
The aim of the study is to investigate the state of humus and nutrient regime of leached chernozem under traditional and alternative systems of sugar beet fertilization. Field, laboratory and analytical methods were used during the research. The application of straw stabilized the humus content in the upper 0-30 cm layer of leached chernozem, increasing its content compared to the control without straw by 0.08-0.12%. The highest absolute content of humus in the layer of 0-30 cm was achieved by applying 5 t/ha of straw + N50 + N100P100K100 - 3.00% with an advantage to control without fertilizers by 0.13%. The combined application of mineral fertilizers and straw provided the conditions for favorable mineral nutrition of sugar beets at the beginning of the growing season and the stability of their growth and development during the growing season. The content of nitrate nitrogen in the layer of 0-30 cm of soil under the application of 5 t/ha of straw + N50 + N100P100K100 was 23.2 mg/kg, ammonium - 14.4, mobile phosphorus - 96, mobile potassium - 109 with the advantage to control without fertilizers by 5.2, 3.5, 7.0 and 12 mg/kg of soil, respectively. The study of the influence of alternative organic-mineral fertilizer systems on soil fertility parameters is the basis for the development of sustainable sugar beet fertilizer systems in the context of climate change.
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