Abstract
The effect of nutrient solutions with certain essential elements lacking, on oxidation reduction potential (RP) of the first leaf was examined in two cultivars of barley seedlings NO3 − and K+ decreasedRP considerably, PO 4 3− did not. The effect of NO3 − and K+ was dependent. on the illuminance. Under glasshouse conditions, the increased level of NO3 − and K+ did not cause any change ofRP. In field conditions, the increased supply of nitrogen fertilizers resulted in a lowerRP in leaves at ear emergence and a higher yield. The use ofRP measurement in leaves for the estimation of the effect of mineral nutrition on plants is discussed.
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Claims 7
Claim · model-written summary
Nitrate reduced leaf redox potential.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaret0 - Treatment
- NO3 −e0
- Outcome
- RPe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“NO3 − and K+ decreasedRP considerably”
t0“barley”
Claim · model-written summary
Potassium reduced leaf redox potential.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- K+e0
- Outcome
- RPe0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NO3 − and K+ decreasedRP considerably”
t0“barley”
Claim · model-written summary
Phosphate did not reduce redox potential.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- PO 4 3−e0
- Outcome
- RPe0
- Direction
- did note0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NO3 − and K+ decreasedRP considerably, PO 4 3− did not”
t0“barley”
Claim · model-written summary
The nitrate and potassium effects depended on illuminance.
- Taxon
- barleyHordeum vulgaret0
- Outcome
- effect of NO3 − and K+e0
- Setting
- illuminancee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of NO3 − and K+ was dependent. on the illuminance”
t0“barley”
Claim · model-written summary
Higher nitrate and potassium caused no redox change in a glasshouse.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- increased level of NO3 − and K+e0
- Outcome
- RPe0
- Direction
- did not cause any changee0
- Setting
- glasshouse conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under glasshouse conditions, the increased level of NO3 − and K+ did not cause any change ofRP”
t0“barley”
Claim · model-written summary
More nitrogen fertilizer lowered field leaf redox potential.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- increased supply of nitrogen fertilizerse0
- Outcome
- RP in leavese0
- Direction
- lowere0
- Setting
- field conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In field conditions, the increased supply of nitrogen fertilizers resulted in a lowerRP in leaves at ear emergence and a higher yield”
t0“barley”
Claim · model-written summary
More nitrogen fertilizer raised field yield.
- Taxon
- barleyHordeum vulgaret0
- Treatment
- increased supply of nitrogen fertilizerse0
- Outcome
- yielde0
- Direction
- highere0
- Setting
- field conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In field conditions, the increased supply of nitrogen fertilizers resulted in a lowerRP in leaves at ear emergence and a higher yield”
t0“barley”
The same questions in other papers
fertilization · yield · Hordeum vulgare (barley)Positive and negative results
472 papers in the same direction as this paper · 66 in the opposite direction · 11 reporting no difference from an alternative
- no effect
- negative
- negative
546 papers more in this group
See all 550 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.