Abstract
Nitrogen is a key contributor to the achievement of high yields in grain crops. The study of the response of new varieties (cultivars) to the use of nitrogen fertilizers in field experiments allowed the authors to identify the most efficient techniques for realizing the potential yield in specific soil and climatic conditions. The research was carried out in 2020–2021 in the conditions of Moscow oblast on sod-podzolic heavy loamy soils with low humus (1.3–1.7%), high phosphorus, and medium potassium levels. The experimental design provided for investigation of the effect of the graded and split doses of nitrogen fertilizer, ranging from 30 to 150 kg of active substance per hectare, introduced in the form of ammonium nitrate (NH4NO3). Fertilizers were applied manually over the seedlings; in variants with split application, the second dose was introduced at the stem elongation stage. The research focused on the spring triticale varieties Timiryazevskaya 42 and Botanicheskaya 4 recorded in the State Register of Breeding Achievements in 2022. Nitrogen fertilizers improved the plant height by 4.7–10.2 cm in Timiryazevskaya 42 and by 8.7–10.1 cm in Botanicheskaya 4 varieties. Additionally, crop lodging was not recorded from any of the experimental variants under the prevailing meteorological conditions. Application of nitrogen fertilizers in doses from 90 to 120 kg/ha resulted in grain yield gains of 3.61–5.10 t/ha in Timiryazevskaya 42 compared to the control (without fertilization) and of 2.71–2.42 t/ha in Botanicheskaya 4. In the experiment, the grain harvest was recorded to be the highest (9.99 t/ha) with application of nitrogen fertilizers in a dose of 120 kg/ha in Timiryazevskaya 42 and 90 kg/ha (7.16 t/ha) in Botanicheskaya 4. Levels of nutrients’ removal without fertilization and high yields with application of large doses of nitrogen fertilizers point toward a higher yield potential of Timiryazevskaya 42 compared to Botanicheskaya 4.
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Funding
This work was carried out as a part of the State Assignment to the Main Botanical Garden of the Russian Academy of Sciences “Hybridization in Plants in Nature and Cultivation: Fundamental and Applied Aspect,” state reg. no. 122042500074–5.
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Translated by E. Kuznetsova
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Alenicheva, A.D., Shchuklina, O.A. The Efficiency of Different Nitrogen Fertilizer Levels in Spring Triticale in the Conditions of Moscow Oblast. Russ. Agricult. Sci. 49, 400–404 (2023). https://doi.org/10.3103/S1068367423040031
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DOI: https://doi.org/10.3103/S1068367423040031