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1
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
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Effect of plant biostimulation with Pentakeep V fertilizer and nitrogen fertilization on the content of macro- and micronutrients in spinach

100%
Smolen S., Sady W.
Journal of Elementology
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2010
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tom 15
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nr 2
343-353
The aim of the research was to determine the influence of foliar nutrition with Pentakeep V as well as differentiated nitrogen fertilisation on the content of macro- (Ca, K, Mg, Na, P and S) and micronutrients (B, Cu, Fe, Mn and Zn) in spinach leaves. Pentakepp V is a fertilizer containing 5-aminolevulinic acid (5-ALA), which is the direct precursor of chlorophyll in plants. In 2006-2007, a pot experiment with spinach Spinacia oleracea L. cv. Spinaker F1 was carried out. The plants were cultivated in 60 × 40 × 20 cm containers placed in an open field under a shade-providing fabric. Containers were filled with loamy clay soil (35% of sand, 28% silt, 37% clay) with the organic matter content of 2.44% in 2006 and 2.52% in 2007. The experiment design included 2 sub-blocks: with and without foliar nutrition. The plants were sprayed twice with Pentakeep V fertilizer in a dose of 0.02% w/v (16 ml 100 dm–3 – 3000 dm3 per 1 ha). In each sub-block, soil fertilization with nitrogen was applied: 1 – control (without N fertilization), 2 – 25 mg N dm–3 of the soil (50% of N dose), 3 – 50 mg N dm–3 of the soil (100% of N dose). Nitrogen fertilization was applied in the form of ammonium nitrate prior to seed sowing. Among all of the determined nutrients, a significant interaction between foliar nutrition and soil application of nitrogen was observed in the case of Ca and Fe content in spinach leaves. Foliar application of Pentakeep V decreased the content of Ca in plants without N fertilization as well as increased the amount of this element in plants fertilized with full dose of nitrogen (100% of N dose). These observations were further verified by the changes of Ca content in soil after plant cultivation. Increased uptake of Ca from soil was observed for plants treated with Pentakeep V and fertilized with the full dose of nitrogen. A higher content of this element in soil was noted after cultivation of plants receiving only Pentakeep V (without N fertilization). Specific interaction of Pentakeep V on the increased content of Fe in spinach fertilized with 50% dose of N was observed. In comparison with the control, N fertilization in both doses (regardless of the foliar nutrition) led to the decrease of the plant content of Ca, Na and Fe as well as resulted in the increased concentration of K in spinach leaves. Plants fertilized with half-dose of N were characterized by lower content of Mn but plants treated with 100 % of nitrogen had higher concentration of this element in comparison to the control. Foliar application of Pentakeep V (considered independently of N fertilization) did not significantly influence the content of these nutrients in spinach leaves. Weather conditions throughout both years of cultivation had no effect on the interaction between foliar nutrition with Pentakeep V and N fertilization on the content of analyzed nutrients.
2
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The effect of plant biostimulation with ‘Pentakeep V’ and nitrogen fertilization on the content of fourteen elements in spinach

67%
Smolen S., Sady W., Wierzbinska J.
Acta Scientiarum Polonorum. Hortorum Cultus
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2010
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tom 09
|
nr 1
Foliar application of growth regulators or fertilizers containing biostimulators can influence the uptake and accumulation of mineral elements by plants. The aim of the research was to determine the influence of foliar application of ‘Pentakeep V’ and diverse nitrogen fertilization on the content of: Ag, Al, Ba, Cd, Co, Cr, Ga, Li, Ni, Pb, Sb, Sr, Ti and V in spinach leaves. In 2006–2007 pot experiment with spinach Spinacia oleracea L. ‘Spinaker F1’ cultivation on silty medium loam was carried out. The experiment design included two sub-blocks: with and without foliar nutrition. Plants with foliar nutrition were sprayed twice with 0.02% w/v ‘Pentakeep V’ fertilizer (3000 dm3 water per 1 ha). In each sub-block soil nitrogen fertilization (in the form of ammonium nitrate) was applied in following combinations: 1 – control (without N), 2 – 50% N dose prior to seed sowing (25 mg N∙dm-3 of soil), 3 – 100% N dose prior to seed sowing (50 mg N∙dm-3 of soil). Foliar application of ‘Pentakeep V’ resulted in (compared to not treated plants): a) significant reduction of the Ag, Al, Ba, Ga, Sr and Ti concentration in plants not fertilized with nitrogen, b) increase in Sr content in spinach fertilized with 100% of N dose, c) relatively weak tendency to lower V accumulation in control plants. The lowest concentration of cobalt was found in plants fertilized with 50% of N dose and not treated with ‘Pentakeep V’. No interaction between foliar nutrition and nitrogen fertilization was found in reference to Cd, Cr, Li, Ni, Pb and Sb content in spinach plants.
3
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The effect of plant biostimulation with ‘Pentakeep V’ and nitrogen fertilization on yield, nitrogen metabolism and quality of spinach

59%
Smolen S., Sady W., Wierzbinska J.
Acta Scientiarum Polonorum. Hortorum Cultus
|
2010
|
tom 09
|
nr 1
Foliar application of fertilizers containing biostimulators can influence yield and the uptake and accumulation of NO3- by plants. The aim of the research was to determine the influence of foliar nutrition with ‘Pentakeep V’ and diverse doses of nitrogen fertilization on yield, plant nitrogen metabolism and nutritional quality of spinach. The experiment design included two sub-blocks with and without foliar nutrition. Plants with foliar nutrition were sprayed twice with 0.02% w/v ‘Pentakeep V’ fertilizer (3000 dm3 water per 1 ha). In each sub-block soil nitrogen fertilization (in the form of ammonium nitrate) was applied in following combinations: 1 – control (without N), 2 – 50% N dose prior to seed sowing (25 mg N∙dm-3 of soil), 3 – 100% N dose prior to seed sowing (50 mg N∙dm-3 of soil). The interaction between foliar nutrition and nitrogen fertilization had a significant effect on the content of: nitrates(V), soluble oxalates and ascorbic acid in spinach leaves. The effect of tested factors on the content of nitrates(V) and ascorbic acid was additionally modified by the weather conditions in both years of research. Foliar application of ‘Pentakeep V’ resulted in decreased concentration of soluble oxalates in control plants (without N) as well as higher amount of these compounds in plants fertilized with 100% of N dose. No significant effect of tested interaction was observed in the case of yield and the content of: dry matter, nitrates(III), ammonium ions, free amino acids, N-total, soluble sugars and phenolic compounds in spinach leaves.
4

Wpływ zróżnicowanego nawożenia azotem i dokarmiania dolistnego nawozem "Pentakeep V" na wielkość i jakość plonu marchwi (Daucus carota L.)

51%
Smolen S., Sady W.
Zeszyty Problemowe Postępów Nauk Rolniczych
|
2009
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tom 539
|
nr 2
Dwa polowe doświadczenia (Doświadczenie-1 w 2006 r. i Doświadczenie-2 w 2007 r.) z uprawą marchwi ‘Kazan F1ʼ zostały przeprowadzone w Trzcianie (50°06ʼ N, 21°85’E). Obydwa doświadczenia składały się z dwóch podbloków: 1. Niedokarmianego dolistnie, 2. Dokarmianego dolistnie nawozem „Pentakeep V”. W Doświadczeniu-1 rośliny były dokarmiane dolistnie dwukrotnie, natomiast w Doświadczeniu-2 rośliny były opryskiwane jeden raz. Każdy podblok składał się z następujących obiektów: 1. Kontrola (nienawożona doglebowo azotem), 2. 1/2 dawki N stosowanego przedsiewnie, 3. Pełna dawka azotu – 1/2 dawki N stosowana przedsiewnie i 1/2 dawki N stosowana pogłównie. W Doświadczeniu-1 1/2 dawki N wynosiła 100 kg N∙ha-1, a w Doświadczeniu-2 1/2 dawki N wynosiła 60 kg N∙ha-1. W obydwu doświadczeniach nie wykazano statystycznie istotnego wpływu współdziałania zabiegu dokarmiania dolistnego „Pentakeep V” z nawożeniem azotem na wielkość plonu oraz na zawartość suchej masy, cukrów rozpuszczalnych, związków fenolowych i karotenoidów w korzeniach spichrzowych marchwi. W Doświadczeniu-1 aplikacja „Pentakeep V” powodowała istoty wzrost zawartości karotenoidów w marchwi. W Doświadczeniu-1 nawożenie azotem w dawce 1/2 N+1/2 N powodowało podwyższenie zawartości karotenoidów, a w Doświadczeniu-2 nawożenie azotem (w dawkach 1/2 N i 1/2 N + 1/2 N) powodowało zwiększenie zawartości związków fenolowych w marchwi.
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