Buryatskaya gosudarstvennaya sel'skohozyaystvennaya akademiya
from 01.01.2023 to 01.01.2025
from 01.01.2023 to 01.01.2025
VAK Russia 4.1.2
VAK Russia 4.1.3
VAK Russia 4.1.4
VAK Russia 4.1.5
VAK Russia 4.2.1
VAK Russia 4.2.2
VAK Russia 4.2.3
VAK Russia 4.2.4
VAK Russia 4.2.5
VAK Russia 4.3.3
VAK Russia 4.3.5
UDC 633.4
UDC 631.81
The objective of this study is to investigate the effect of synnyrite-based fertilizers on potato yield and the potassium status of this soil in arid steppe conditions on sandy chestnut loam. A three-year microfield study on chestnut soil in the dry steppe zone of the Ivolginsky District of the Republic of Buryatia examined the effectiveness of synnyrite and an organomineral fertilizer based on synnyrite and oxidized brown coal on the yield of the Gala potato variety and the potassium status of the soil. The initial experimental soil had a low humus content (up to 2 %), low phosphorus content, and medium exchangeable potassium. The soil had a sandy loam texture. Potassium sulfate, synnyrite from the Synnyrsky deposit, and synnyrite enriched with oxidized brown coal from the Gusinoozersk deposit were used in the experiment. The K2O content in the original synnyrite was 18.6 %, while in the organomineral fertilizer it was up to 14.5 %. Finely ground synnyrite was comparable in yield to standard potash fertilizer. The greatest increase in potato yield was achieved with synnyrite enriched with oxidized brown coal, reaching 7 t/ha (33 %) relative to the control. The use of synnyrite resulted in a 1.4-fold increase in the total and exchangeable potassium content compared to the control enriched with oxidized carbon. The synnyrite flour treatment showed an increase in exchangeable potassium content up to 2.5 times and a 0.9-fold decrease in total potassium compared to the control. With the application of potassium fertilizers, the K content increased from low to high (according to the Machigin grading). Not applying potassium-containing fertilizers (the control) resulted in a decrease in the amount of all forms of potassium in the soil. The agronomic effectiveness of using synnyrite-based potassium fertilizers, as well as the accumulation of available forms of potassium in the soil, was established.
potato yield, potato, synnyrite, chlorine-free potassium fertilizers, exchangeable potassium, non-exchangeable potassium, total potassium content
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