Uman National University | today: 07/07/2025
| Author(s) |
Hospodarenko G.M., Doctor of Agricultural Sciences, Professor of Department of Agricultural Chemistry and Soil Science, Uman National University of Horticulture, Ukraine Cherno O.D., Candidate of Agricultural Science, Associate Professor of Department of Agricultural Chemistry and Soil Science, Uman National University of Horticulture, Ukraine Leonova K. P., PhD of Agricultural Sciences, , Uman National University of Horticulture |
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| Category | 201 "Agronomy" | ||
| year | 2021 | issue | №2,2021 |
| pages | 31-36 | index UDK | 631.416.2 | DOI | 10.31395/2310-0478-2021-2-31-36 (Link) |
| Abstract | The gross phosphorus content and its distribution between the fractions of soil phosphates depends on the genetic characteristics of the soil and the influence of various factors, including anthropogenic. The purpose of the study is to study the change in the content and fractional composition of mineral phosphates in chernozem podzolic heavy loam of the Right Bank Forest-Steppe after long (55 years) application of various fertilizer systems in field crop rotation. Sampling of soil samples was carried out from soil layers, cm: 0–20, 20–40, 40–60, 60–80, 80–100. The fractional composition of mineral phosphates in the soil was determined by the method of Chang and Jackson in the Ginzburg-Lebedeva modification. It is established that chernozem podzolic heavy loam of the Right-Bank Forest-Steppe is characterized by rather high potential opportunities for providing plants with phosphorus. After long-term application of fertilizers in the field crop rotation, the content of gross P2O5 varies from 0,07 % to 0,11 %, depending on the variant of the experiment and the soil layer (for the content of 0.07–0.10 % on the fallow land). It is established that under the influence of biological, climatic and agro-technological factors in the phosphate fund of podzolic chernozem significant changes take place over time, which include simultaneous transformation and regrouping of all fractions of soil phosphorus compounds. Insoluble phosphates are converted into active forms, converted into soil solution and become potentially available to plants. The influence of long-term application of different fertilizer systems in field crop rotation on the content and mobility of mineral phosphates in chernozem podzolic heavy loam is significant. The share of mineral phosphates in the upper layer (0–20 cm) of podzolic chernozem is 67% for mineral to 61% of gross phosphorus for organic fertilizer system. The main share of mineral phosphates in podzolic heavy loam chernozem is represented by calcium phosphates Ca – P, which is determined by the genetic features of this subtype of soil. According to the content of mineral phosphate fraction in the soil layer 0–20 cm can be presented in the following series: Са – РІІ> Са – РІІІ> Са – РІ> Fe – P> Al – P. The phosphate level of podzolic chernozem can be increased by applying fertilizers. This is facilitated by a number of factors: the preservation of phosphorus fertilizers in the soil in an accessible form, the practical absence of losses due to migration in the soil profile and the environment. | ||
| Key words | heavy loam podzolic chernozem, fallow land, gross phosphorus, fractional composition of mineral phosphates, fertilizer systems, field crop rotation | ||