Year: 2022
Type: article
Abstract: Purpose. To evaluate the symbiotic parameters of winter pea sowings depending on nitrogen fertilization and seed inoculation in the Right Bank Forest Steppe of Ukraine. Methods. The research was carried out at the Agronomic Research Station of the National University of Bioresources and Nature Management of Ukraine (Kyiv region) in 2019–2021. Winter pea variety ‘NS Moroz’ was grown in a two-factor field experiment with the following treatments: seed inoculation (control – without inoculation) with inoculant Optimize Pulse and application of different doses of nitrogen fertilizers in the main (autumn) fertilization + foliar application at the beginning of vegetation (N0 – control, N15 + N15, N15 + N30, N15 + N45, N30 + N0, N30 + N15, N30 + N30, N45 + N0, N45 + N15, N60 + N0). The rest of the elements of agricultural technology were conventional. Results. Seed inoculation with Optimize Pulse seeds revealed a positive effect on the formation of colonies of nodule bacteria. At the same time, fertilization treatment with minimal nitrogen (N15) dose at the main fertilization was more efficient in terms of impact on the symbiotic properties of plants. As the dose of the main fertilizer increased, both the total number of nodules on the root system of plants and their mass decreased. It was established that the seed inoculation factor determined the number of active nodule bacteria in the budding stage of pea by 35%; weather conditions and main fertilization had approximately the same share of influence – 29 and 28%, respectively. At the same time, foliar application of fertilizers did not significantly affect the number of active nodule bacteria. Conclusions. As the dose of base fertilizer increased, both the number and mass of active colonies of nodule bacteria decreased as the dose of nitrogen fertilizers increased. The obtained dependency for the number of nodules can be described by the equation y = −0.1799x + 24.592, and for their mass y = −1.6817x + 258.17. Given the linearity of the reduction of these indicators. Obtained equations can be used to accurately predict the state of the symbiotic apparatus of plants in the case of application of doses of nitrogen fertilizers different from those studied in the experiment. Regarding the regularities of the formation of symbiotic potential depending on nitrogen fertilization, the best treatments for both general and active potential were the application of the main fertilizer at a dose of N15 followed by later application of N30–45.
Source: Advanced Agritechnologies
Authors: N. V. Novytska, O. V. Ponomarenko
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: diamond
OpenAlex ID: W4313266268