Uman NUH | today: 03/17/2021

Evaluation of potential capacity of podzolized black soil to aggregation in durable application of fertilizers in field rotation

Author(s) Nedvyha N.V., Candidate of Agricultural Science, , Uman National University of Horticulture, Ukraine
Halasun Yu.P., Candidate of Agricultural Science, , Uman National University of Horticulture, Ukraine
Category The Agronomy
year 2013 issue Issue #82
pages 153-159 index UDK 631.434
Abstract In the long-term (since 1964) permanent field experiment of the Department of Agrochemistry and Soil Science of Uman National University of Horticulture the influence of mineral, organic and organo-mineral fertilizer systems on the formation of microstructure of the podzolized black soil has been researched with the help of different methods. The fertilizers were applied on three levels: single rate of mineral fertilizers — N45P45K45, organic — 4,5t/ha of manure and organo-mineral-of manure 4,5t/ha + N22P34K18. The research was carried out in the field rotation link: peas - winter wheat - silage maize with the application of mineral system N10P10K10, N30P30K30, N60P60K60 under peas; under winter wheat respectively N45P45K45, N90P90K90, N200P200K200, manure was applied under sugar beets which were peas predecessor and under silage maize respectively 40,45 and 60 t/ha. Mineral fertilizers reduce the coefficients of soil pedality and micro-aggregation as well as the granulometric index of soil pedality but the aggregation level even at the triple rate of solid mineral fertilizers remains within the non-significant difference. Organic fertilizers facilitate the essential improvement of soil aggregation. Organic-mineral fertilizer systems, especially in their triple combination, are not worse than organic systems in terms of their positive effect on the black soil aggregation.
Key words fertilizer systems, podzolized black soil, aggregation, micro-aggregation coefficient, dispersion coefficient, aggregation degree.
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