Tag Archives: nodules

334–357 O. Mazur, R. Kravets, I. Didur, O. Mazur, V. Tsyhanskyi and Y. Chepernaty
Adaptability of soybean varieties assessed through symbiotic activity under different soil-climatic conditions
Abstract |
Full text PDF (436 KB)

Adaptability of soybean varieties assessed through symbiotic activity under different soil-climatic conditions

O. Mazur¹, R. Kravets², I. Didur¹, O. Mazur¹, V. Tsyhanskyi¹ and Y. Chepernaty¹

¹Vinnytsia National Agrarian University, Educational and Scientific Institute of Agrotechnology and Environmental Sciences, 3 Soniachna Str., UA 21008 Vinnytsia, Ukraine
²Vinnytsia National Agrarian University, Department of Ukrainian and Foreign Languages, 3 Soniachna Str., UA 21008 Vinnytsia, Ukraine
*Correspondence: sashamazur1978@outlook.com

Abstract:

The purpose of this work reveals itself in distinguishing ontogenetic adaptation parameters according to the symbiotic performance indicators of soybean varieties for the introduction of such varieties into production and as source material for the development of new soybean varieties with high and stable nitrogen-fixing capacity. The research was conducted in different soil-climatic regions of Ukraine, enabling the assessment of soybean variety responses to varying ecological conditions. Indicators of the active symbiotic apparatus and the amount of biologically fixed nitrogen were determined using the Volkohon methodology. Adaptability of the researched varieties was assessed by their symbiotic potential considering the method developed by Eberhart and Russell. The study presents the scientific results on the assessment of soybean varieties by adaptability of active nodules and their mass, active symbiotic potential, and accumulation of biologically fixed nitrogen. The highest amount of biologically fixed nitrogen was recorded in such varieties as Hoverla – 101.12 ± 0.39 kg ha-1, Artemida – 98.07 ± 0.38 kg ha-1, Amethyst – 95.51 ± 0.38 kg ha-1 and Vezha – 93.40 ± 0.38 kg ha-1, respectively. Despite the different reaction of varieties to fluctuations in environmental conditions, the selected varieties were distinguished by high stability of the formation of the amount of biologically fixed nitrogen. In the Vezha and Amethyst varieties, the stability index (Si2) was as close to zero as possible. Although the varieties differed in their responses to environmental fluctuations, the selected Hoverla, Artemida, Amethyst and Vezha soybean varieties demonstrated high stability in biologically fixed nitrogen accumulation and were recommended for the development of new soybean varieties, considering their stable realization under different soil-climatic growing conditions.

Key words:

, , , , , ,



730-750 S. Kalenska, N. Novytska, V. Kalenskii, L. Garbar, T. Stolyarchuk, N. Doktor, S. Kormosh and A. Martunov
The efficiency of combined application of mineral fertilizers, inoculants in soybean growing technology, and functioning of nitrogen-fixing symbiosis under increasing nitrogen rates
Abstract |
Full text PDF (405 KB)

The efficiency of combined application of mineral fertilizers, inoculants in soybean growing technology, and functioning of nitrogen-fixing symbiosis under increasing nitrogen rates

S. Kalenska¹, N. Novytska¹, V. Kalenskii¹, L. Garbar¹, T. Stolyarchuk¹*, N. Doktor², S. Kormosh² and A. Martunov³

¹National University of Life and Environmental Sciences of Ukraine, Department of Plant Science, Heroiv Oborony Str., 15, UA03041 Kyiv, Ukraine
²SS NULES ‘Mukachevo agricultural college’, Matrosova Str., 32, UA89600 Mukachevo, Zakarpattya reg., Ukraine
³Ukrainian Institute for Plant Variety Examination, Henerala Rodymtseva Str., 15, UA03041, Kyiv, Ukraine
*Correspondence:wisssy6@gmail.com

Abstract:

Soy is a valuable leguminous crop, whose productivity directly depends on many factors, among which nitrogen fertilizers are one of the most important. Nitrogen fertilizing of this crop is often given insufficient attention because the yield increase can be quite insignificant. The purpose of the research is to study the combined effect of biofertilizers and increasing rates of nitrogen mineral fertilizers on the growth, development, and yield of soybean varieties. The experiment is three-factorial: factor A – early ripening soybean varieties Annushka and Ustya, factor B – seeds inoculation by biofertilizer, and factor C – rates of mineral fertilizers application. Results of research show the efficiency of nitrogen-fixing symbiosis during seed inoculation was established for nitrogen rates from N0 to N60 against the background of P60K60 – the biomass of nodule bacteria is 418–675 mg plant-1. The application of N90P60K60 significantly reduces the number and mass of nodule bacteria – 207–241; N120P60K60 – 32.0–42.0 mg plant-1, and with the introduction of P60K60 + N150–180 nodule bacteria are not formed and the effectiveness of microbiological drugs is not recorded. Nitrogenase activity with N0–90 application on the background of P60K60 and seed inoculation ranged from 3.25 to 7.76 μmol C2H4 per plant ha-1. With a further increase in nitrogen levels, nitrogenase activity was not recorded. On typical chernozems of the Forest-Steppe of Ukraine, higher yields of early-ripening soybean varieties are formed by applying N60P60K60 and pre-sowing seeds treatment with rhizohumin or rhizohumin/hetomics combination. P60K60N150–180 showed a partial decrease in soybean yield due to the distress effect.

Key words:

, , , , , ,