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Sirvi Autor "Garbar, L." järgi

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  • Pisipilt
    Kirje
    The efficiency of combined application of mineral fertilizers, inoculants in soybean growing technology, and functioning of nitrogen-fixing symbiosis under increasing nitrogen rates
    (Estonian University of Life Sciences, 2022) Kalenska, S.; Novytska, N.; Kalenskii, V.; Garbar, L.; Stolyarchuk, T.; Doktor, N.; Kormosh, S.; Martunov, A.
    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 shows 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.
  • Pisipilt
    Kirje
    Nanopreparations in technologies of plants growing
    (2021) Kalenska, S.; Novytska, N.; Stolyarchuk, T.; Kalenskyi, V.; Garbar, L.; Sadko, M.; Shutiy, O.; Sonko, R.
    The use of engineered nanomaterials in sustainable agriculture has demonstrated a completely new way of food production that can potentially overcome uncertainty in the agricultural sector with limited available resources. Nanoparticle engineering is one of the latest technological innovations which demonstrate unique target characteristics. During 2013–2020, research on the directions and effectiveness of nanopreparations in plant growing: nutrient source, activation of photosynthesis, immunocorrectors, stimulators of seed germination, plant growth and development, multivalent drugs for increasing plant resistance to stress was conducted. Monoparticles, nanoparticle combinations, and chelate complex of nano fertilizers on crops of soybean were tested. Field research was conducted in a stationary field experiment of the Plant Science Department of the National University of Life and Environmental Sciences of Ukraine. The soil of the stationary experiment is typical chernozem. In research was used soybean (Glycine max (L.) Merr.) of early-ripening variety Horol. Over the years of research, weather conditions varied, but were within the typical for zone of research. Average monthly temperatures were close or higher the perennial average indicators. The purpose of the research is to find out the influence of pre-sowing seed treatment and fertilizing of crops by nano-preparations Avatar (microfertilizer of carboxylates of natural acids), Iodis-concentrate (immunomodulator - stimulator of growth processes), and Super Micro Plus (nanochelate fertilizer) on leaf formation - rate, the activity of symbiotic nitrogen fixation and yield of soybean variety Horol. Nanopreparations were used for pre-sowing seed treatment and fertilizing - spraying during the growing season in several doses. The use of nanopreparations, as seed treatment in combination with inoculation and as fertilizer, intensified formation of the leaf surface area, symbiotic apparatus activity of soybean plants. The introduction of nanofertilizers complex in the top-dressing helped to increase yields and change the functional quality of crop products which indicates their unconditional effectiveness. Soybean yield significantly depended on weather conditions, varying from 1.23 to 3.48 t ha-1 depending on the weather conditions and the combination of seed inoculation and nanofertilizer. Soybean yield under favourable weather conditions in 2016, depending on the use of preparation combination ranged from 2.27 to 3.48 t ha-1 . As a result of the research, it was found that the use of nanopreparations Avatar, Jodis-concentrate and Super Micro Plus for seed treatment and fertilizing intensified leaf surface formation and symbiotic apparatus activity of soybean plants. The obtained results confirm that application of nanofertilizers complex Jodis-concentrate, Avatar and nano chelate fertilizer Super Micro Plus in the soybean fertilizing helped to increase the yield, which testifies to their unconditional effectiveness. The highest efficiency of nanofertilizers was shown by inoculation and seed treatment by Avatar and fertilizing by Avatar + nano chelate fertilizer Super Micro Plus, providing the formation of 52.4 thousand m2 ha-1 of leaf surface area of soybean varieties Horol, 69.7 pcs per plant of root nodules, 785 mg per plant of their weight and yield at the level of 2.79 t ha-1 an average of five years.