Abstract
A greenhouse study was carried out to determine the effect of nitrogen forms and different O2 levels on growth and mineral nutrient concentrations of eggplant. The experimental design was a completely randomized factorial experiment with two factors, namely: (i) Two nitrogen forms (Ca(NO3)2 and (NH4)2SO4) and (ii) Three O2 levels of the nutrient solutions (1±0.3, 2±0.3, 3±0.3, and 4±0.3 mg L O2). The results showed that ammonium application reduced all measured parameters of vegetative growth, whereas high oxygen levels increased the vegetative growth. Comparing with nitrate-N, ammonium application increased the concentrations of NPK and Zn in leaves and Zn and Cu in roots, while it decreased the concentration of Mg, Ca, Cu, Mn, and Na in leaves and Ca, Mg, Mn, and Na in roots. High levels of O2 increased N, Mg, Ca, Cu, and Mn content of leaves, as well as Mn and Na content in roots, while it decreased the concentration of K in leaves and P and Zn in roots. According to the results, the increase in O2 amount of the nutrient solutions partly alleviated ammonium toxicity in eggplant. Therefore, in floating hydroponic cultures, O2 level and its distribution should be controlled and must not be lower than 4 mg L.
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Claims 12
Claim · model-written summary
Ammonium reduced measured vegetative growth parameters.
- Taxon
- eggplant
Solanum melongenat0 - Treatment
- ammonium applicatione0
- Outcome
- all measured parameters of vegetative growthe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ammonium application reduced all measured parameters of vegetative growth”
t0“Eggplant”
Claim · model-written summary
High oxygen increased vegetative growth.
- Taxon
- eggplantSolanum melongenat0
- Treatment
- high oxygen levelse0
- Outcome
- vegetative growthe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“high oxygen levels increased the vegetative growth.”
t0“Eggplant”
Claim · model-written summary
Ammonium increased leaf NPK and Zn relative to nitrate.
- Taxon
- eggplantSolanum melongenat0
- Treatment
- ammonium applicatione0
- Outcome
- concentrations of NPK and Zn in leavese0
- Direction
- increasede0
- Comparator
- nitrate-Ne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Comparing with nitrate-N, ammonium application increased the concentrations of NPK and Zn in leaves”
t0“Eggplant”
Claim · model-written summary
Ammonium increased root Zn and Cu relative to nitrate.
- Taxon
- eggplantSolanum melongenat0
- Treatment
- ammonium applicatione0
- Outcome
- Zn and Cu in rootse0
- Direction
- increasede0
- Comparator
- nitrate-Ne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Comparing with nitrate-N, ammonium application increased the concentrations of NPK and Zn in leaves and Zn and Cu in roots”
t0“Eggplant”
Claim · model-written summary
Ammonium decreased leaf Mg, Ca, Cu, Mn and Na relative to nitrate.
- Taxon
- eggplantSolanum melongenat0
- Treatment
- ammonium applicatione0
- Outcome
- concentration of Mg, Ca, Cu, Mn, and Na in leavese0
- Direction
- decreasede0
- Comparator
- nitrate-Ne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Comparing with nitrate-N, ammonium application increased the concentrations of NPK and Zn in leaves and Zn and Cu in roots, while it decreased the concentration of Mg, Ca, Cu, Mn, and Na in leaves”
t0“Eggplant”
Claim · model-written summary
Ammonium decreased root Ca, Mg, Mn and Na.
- Taxon
- eggplantSolanum melongenat0
- Outcome
- Ca, Mg, Mn, and Na in rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“and Ca, Mg, Mn, and Na in roots.”
t0“Eggplant”
Claim · model-written summary
High oxygen increased leaf N, Mg, Ca, Cu and Mn.
- Taxon
- eggplantSolanum melongenat0
- Treatment
- High levels of O2e0
- Outcome
- N, Mg, Ca, Cu, and Mn content of leavese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High levels of O2 increased N, Mg, Ca, Cu, and Mn content of leaves”
t0“Eggplant”
Claim · model-written summary
High oxygen increased root Mn and Na.
- Taxon
- eggplantSolanum melongenat0
- Treatment
- High levels of O2e0
- Outcome
- Mn and Na content in rootse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“High levels of O2 increased N, Mg, Ca, Cu, and Mn content of leaves, as well as Mn and Na content in roots”
t0“Eggplant”
Claim · model-written summary
High oxygen decreased leaf K.
- Taxon
- eggplantSolanum melongenat0
- Outcome
- concentration of K in leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while it decreased the concentration of K in leaves”
t0“Eggplant”
Claim · model-written summary
High oxygen decreased root P and Zn.
- Taxon
- eggplantSolanum melongenat0
- Outcome
- P and Zn in rootse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“and P and Zn in roots.”
t0“Eggplant”
Claim · model-written summary
Higher oxygen partly alleviated ammonium toxicity.
- Taxon
- eggplantSolanum melongenae0
- Treatment
- increase in O2 amount of the nutrient solutionse0
- Outcome
- ammonium toxicitye0
- Direction
- partly alleviatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the increase in O2 amount of the nutrient solutions partly alleviated ammonium toxicity in eggplant.”
Claim · model-written summary
The authors recommend controlling oxygen at no less than 4 mg L in floating hydroponics.
- Taxon
- eggplantSolanum melongenat0
- Outcome
- O2 level and its distribution should be controlled and must not be lower than 4 mg Le0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in floating hydroponic cultures, O2 level and its distribution should be controlled and must not be lower than 4 mg L.”
t0“Eggplant”
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- no effect
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1 paper in the same direction as this paper · 18 in the opposite direction
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See all 20 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.