Effects of Nitrogen Treatments on Macro and Microelement Contents of Oil Sunflower (Helianthus annuus L.) Seeds

doi:10.20431/2454-6224.0301005

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“…Ai et al [41] found that Cu and Mn concentrations in the aboveground tissues of Bothriochloa ischaemum increased significantly with N addition. The determined trends of changes in the Fe, Mn and Cu contents may vary with N nutrition intensity [42] as observed in this study.…”

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confidence: 64%

Effect of Varied Nitrogen Sources and Type of Cultivation on the Yield and Physicochemical Parameters of Flowering Chinese Cabbage (Brassica campestris L. ssp. chinensis var. utilis Tsen et Lee)

2023

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The aim of our study was to determine the effect of various nitrogen sources (NH4NO3 (N, 34%), Ca(NO3)2 (N, 15.5%; Ca, 18%), Mg(NO3)2 (N, 11%; Mg, 12%), NaNO3 (N, 15%; Na, 25%) and urea (N, 46%)) and increasing the intensity of N nutrition with these fertilisers (50, 70, and 90 mg N·dm−3) on the yield and quality of flowering Chinese cabbage (Brassica campestris L. ssp. chinensis var. utilis Tsen et Lee). The plants were grown in two different soilless systems, namely pot cultivation (substrate system—mixture of peat and sand) and hydroponic cultivation. The quality of plants was expressed as macro- and microelement contents, pigment contents, antioxidant activity and phenolic content. It was observed that the yield of flowering Chinese cabbage was about 43–70% higher in the hydroponic system than in the substrate. The N source and N nutrition affected the yield volume. The highest mean yield was observed in pot cultivation after fertilisation with Mg(NO3)2 and in hydroponics with Ca(NO3)2. We found a rather high tolerance of flowering cabbage to sodium and an excessive content of ammonium in the nutrient solution. The nitrogen source and N doses modified plant contents of macro- and microelements (N, P, K, Ca, Mg, Na, Fe, Mn, Zn and Cu) and other quality parameters of plants. In pot cultivation, the highest element contents as well as the highest antioxidant activity were obtained after fertilisation with Mg(NO3)2 at N-70 and N-90. The highest pigment contents (chlorophylls and carotenoids) were obtained in the samples treated with urea at the N-90 dose. Those samples were also characterised by a high Mn content. Generally, the pigment content in the pot system positively correlated with the Mn content in leaves, the microelement which is involved in the process of photosynthesis, but it did not correlate with colour coordinates. In the hydroponic system, the highest pigment contents were observed in the samples treated with Mg(NO3)2 at the N-70 dose. Generally, in hydroponics, chlorophyll levels positively correlated with Ca levels in the aboveground parts of the plants. Additionally, the content of Chl b inversely correlated with L* and b* values. In hydroponic systems, the highest DPPH (2,2-diphenyl-1-picrylhydrazyl) activity was observed after treatment with NH4NO3 at the N-70 and N-90 doses and it did not correlate with phenolic content but rather with pigment content. In conclusion, both the intensity of N nutrition and the fertiliser applied can significantly modify the yield of plants and their quality parameters. For pot cultivation, the most effective fertiliser was Mg(NO3)2 at the N-70/N-90 doses, while for hydroponic cultivation, it is difficult to indicate the most effective fertiliser as the responses varied depending on the method of fertilisation.

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Section: Discussionsupporting

confidence: 64%

Effect of Varied Nitrogen Sources and Type of Cultivation on the Yield and Physicochemical Parameters of Flowering Chinese Cabbage (Brassica campestris L. ssp. chinensis var. utilis Tsen et Lee)

2023

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Foliar nutritionin modern sunfl ower hybrid growing technologies

Palamarchuk

2020

Agrobìologìâ

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The results of the study on foliar nutrition infl uence on the productivity of sunfl ower hybrids are presented in the article. The research was carried out in the period 2018–2019 in the conditions of the experimental fi eld of VNAU on the basis of NRF "Agronomichne," located in the village of Agronomichne, Vinnytsia region. The research studied two hybrids of sunfl ower mid-early ripenessgroup: Basfora and Sanai MR in the application of foliar nutrition microfourings Vanguard R Sunfl ower which was introduced into the phase 3–4 and 6–8 pairs of leaves. Thesoil on the experimental plot is a gray forest middle-loamy. According to the results of measurements, the height of plants in Basfora sunfl ower hybrid on control, on average for two years of research was 181.0 cm, and Sanai MR hybrid – 169.5 cm. When applying microfertilizers in phase 3–4 pairs of Bosphora leaves – 186.0 cm, Sanai MR – 174.5 cm, in phase 6–8 pairs of Bosphora leaves – 187.5 cm, Sanai MR – 174.5 cm and with double application microfertilizers in phase 3–4 and 6–8 leaves – 191,0 and 175,0 cm, respectively for the hybrids of Bosphora and Sanai MR. Foliar nutrition reduces the number of plants aff ected by gray rot by 1.2–2.5 % for the Bosphora hybrid and 1.0–1.7 % for the Sanai MR hybrid and white rot – Bosphora by 1.6–2 in the studied sunfl ower hybrids, 1 % and Sanai MR – 0.6–1.4 %. Carrying out foliar nutrition contributed to the growth of the mass of seeds from one plant. In particular, application of microelements Vanguard R Sunfl ower in phase 3–4 pairs of leaves provides the following value of seed weight from one plant: Basfora – 45.0 grams, Sanai MG – 40.5 grams, introduction in phase 6–8 pairs of leaves 44.7 and 39 7 grams, and two-day introduction of this microelement in phase 3–4 and 6–8 pairs of leaves – 48.6 and 42.6 grams. It is also noted that the implementation of foliar nutrition provided an increase in the number of seeds in the infl orescence (basket). On control (without nutrition), the number of seeds from the basket, respectively, was 698 and 663 pieces, for the hybrid of the Bosphora and Sanai MR. The lowest productivity of the studied sunfl ower hybrids was formed on the control (without foliar feeding): Bosphora – 2.85 t/ha and Sanai MR – 2.79 t/ha. The highest productivity on sunfl ower crops in the studied hybrids was obtained under double foliar nutrition of sunfl ower with microfertilizers Avanhard R in the phase 3–4 and 6–8 pairs of leaves and on average during the years of research it amounted to 3.19 t/ha for the Basfora hybrid and 3.14 t/ha for the Sanai MR hybrid, which is 0.44 and 0.35 % more than the control. Key words: sunfl ower, productivity, hybrid, foliar nutrition, microfertilizers, development phase, disease, pests.

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Effects of Nitrogen Treatments on Macro and Microelement Contents of Oil Sunflower (Helianthus annuus L.) Seeds

Abstract: Abstract:The present study was carried out to investigate the effects of different nitrogenous fertilizer treatments through soil (0, 30, 60, 90, 120 and 150 kg N ha -1 ) on macro and micro nutrient (N, P, K, Ca, Mg, Fe, Zn, Mn, Cu and B)

Cited by 2 publications

References 6 publications

Effect of Varied Nitrogen Sources and Type of Cultivation on the Yield and Physicochemical Parameters of Flowering Chinese Cabbage (Brassica campestris L. ssp. chinensis var. utilis Tsen et Lee)

Effect of Varied Nitrogen Sources and Type of Cultivation on the Yield and Physicochemical Parameters of Flowering Chinese Cabbage (Brassica campestris L. ssp. chinensis var. utilis Tsen et Lee)

Foliar nutritionin modern sunfl ower hybrid growing technologies

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