Abstract
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 F 1 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
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Claims 5
Claim · model-written summary
Foliar nutrition and nitrogen interacted significantly for spinach leaf calcium content.
- Taxon
- spinach
Spinacia oleraceae0 - Treatment
- foliar nutrition and soil application of nitrogene0
- Outcome
- Cae0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a significant interaction between foliar nutrition and soil application of nitrogen was observed in the case of Ca and Fe content in spinach leaves.”
Claim · model-written summary
Foliar nutrition and nitrogen interacted significantly for spinach leaf iron content.
- Taxon
- spinachSpinacia oleraceae0
- Treatment
- foliar nutrition and soil application of nitrogene0
- Outcome
- Fe contente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a significant interaction between foliar nutrition and soil application of nitrogen was observed in the case of Ca and Fe content in spinach leaves.”
Claim · model-written summary
Pentakeep V reduced calcium content without nitrogen fertilization.
- Taxon
- spinachSpinacia oleraceat0
- Treatment
- Foliar application of Pentakeep Ve0
- Outcome
- content of Cae0
- Direction
- decreasede0
- Qualifier
- without N fertilizatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar application of Pentakeep V decreased the content of Ca in plants without N fertilization”
t0“spinach”
Claim · model-written summary
Pentakeep V increased calcium content with full nitrogen fertilization.
- Taxon
- spinachSpinacia oleraceat0
- Treatment
- Pentakeep Ve1
- Outcome
- Cae1
- Direction
- increasede0
- Qualifier
- full dose of nitrogen (100% of N dose)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased the amount of this element in plants fertilized with full dose of nitrogen (100% of N dose).”
e1“Foliar application of Pentakeep V decreased the content of Ca”
t0“spinach”
Claim · model-written summary
Pentakeep V with full nitrogen increased calcium uptake from soil.
- Taxon
- spinachSpinacia oleraceat0
- Treatment
- Pentakeep V and fertilized with the full dose of nitrogene0
- Outcome
- uptake of Ca from soile0
- Direction
- Increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increased uptake of Ca from soil was observed for plants treated with Pentakeep V and fertilized with the full dose of nitrogen.”
t0“spinach”
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