APPLICATION OF HUMIC AND MINERAL FERTILIZERS ON SPRING RAPESEED SOWINGS
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The research was carried in 2018-2020 on chernozem soils in the conditions of the southern forest-steppe in the Omsk region. The purpose of the work was to study the effect of humic and different doses of mineral fertilizers on the productivity of spring rapeseed varieties Yubileyny and 55region. The experiments showed a high effect of humates application both on the background without mineral fertilizers and at their introduction, especially in the dry 2020. The yield in the control variant by varieties was 2.51-2.92 t/ha, while in overmoistened 2019 the yield was minimal (1.20-1.34 t/ha). The application of ammonium nitrate at a dose of 90 kg contributed to an increase in yield of the variety Yubileyny by 0.3-0.61 t/ha in 2018-2019, and in 2020, it did not cause a significant increase in yield. In 2018 and 2020, the application of ammonium nitrate at this dose on the variety 55region did not lead to a significant increase in seed yield, but in 2019, the seed increase of this variant was 0.46 t/ha (i.e. 34.3 %). The application of the preparation Humate +7 contributed to an additional increase in seed yield in the studied varieties. The application of nitrogen-phosphorus fertilizers at a dose of 60 kg of a.i. We noted an increase in the growing season by 2-8 days when mineral fertilizers are applied. During the years of research, the fat content of seeds in the control variant of the variety Yubileyny varied on average within 48.9-50.7 %, and of the variety 55region – 51.6-53.2 %. There was no decrease in oil content due to the application of humic fertilizers, and in the dry 2020, there was even an essential increase in content from 0.3 to 0.6 ^in the variety Yubileyny and from 0.3-0.8 % in the variety 55region.
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References
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