Abstract
SummaryCucumber plants were grown under greenhouse conditions in a modified Hoagland’s solution to determine the effect of forms and combinations of nitrogen on growth and chemical composition, and the response of cultivars to N forms. Nitrate significantly increased dry weights of fruit, leaves and roots whereas ammonium decreased them. The N content of fruit, leaves, stems and roots; P in fruit, leaves and stems significantly increased when 50% or more of the N source was NH4, but NO3 decreased the N and P content in all parts of plant. With 100% NO3, there was an increase in the K and Mg content of the fruit; and a large increase in Ca levels in fruit, leaves, stems and roots. Fifty per cent or more of the N as urea significantly increased the N content in leaves and roots, P in all tissues, K in fruit and Mg in fruit and leaves. Ammonium as an N form decreased the K, Ca and Mg content of all tissues. Ammonium toxicity and necrotic effects of urea were observed when they represented more than 50% of the N in the solution. In general, there were no significant differences in the response of two cultivars to N forms. When using the N content of a plant to determine the N status of plant tissue, the effect of N form on the percentage of N as well as other essential minerals must be considered.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 16
Claim · model-written summary
Nitrate increased dry weights of cucumber fruit, leaves and roots.
- Taxon
- Cucumber
Cucumis sativust0 - Treatment
- Nitratee0
- Outcome
- dry weights of fruit, leaves and rootse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrate significantly increased dry weights of fruit, leaves and roots whereas ammonium decreased them.”
t0“cucumbers”
e1“With 100% NO3”
Claim · model-written summary
Ammonium decreased dry weights of cucumber fruit, leaves and roots.
- Taxon
- CucumberCucumis sativust0
- Treatment
- ammoniume0
- Outcome
- dry weights of fruit, leaves and rootse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrate significantly increased dry weights of fruit, leaves and roots whereas ammonium decreased them.”
t0“cucumbers”
e1“With 100% NO3”
Claim · model-written summary
At least 50% ammonium increased nitrogen content of cucumber fruit, leaves, stems and roots.
- Taxon
- CucumberCucumis sativust0
- Treatment
- 50% or more of the N source was NH4e0
- Outcome
- N content of fruit, leaves, stems and rootse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The N content of fruit, leaves, stems and roots; P in fruit, leaves and stems significantly increased when 50% or more of the N source was NH4”
t0“cucumbers”
e1“With 100% NO3”
Claim · model-written summary
At least 50% ammonium increased phosphorus in cucumber fruit, leaves and stems.
- Taxon
- CucumberCucumis sativust0
- Treatment
- 50% or more of the N source was NH4e0
- Outcome
- P in fruit, leaves and stemse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P in fruit, leaves and stems significantly increased when 50% or more of the N source was NH4”
t0“cucumbers”
e1“With 100% NO3”
Claim · model-written summary
Nitrate decreased nitrogen and phosphorus content throughout cucumber plants.
- Taxon
- CucumberCucumis sativust0
- Treatment
- NO3e0
- Outcome
- N and P content in all parts of plante0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NO3 decreased the N and P content in all parts of plant.”
t0“cucumbers”
e1“With 100% NO3”
Claim · model-written summary
Full nitrate increased fruit potassium and magnesium content.
- Taxon
- CucumberCucumis sativust0
- Treatment
- 100% NO3e0
- Outcome
- K and Mg content of the fruite0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With 100% NO3, there was an increase in the K and Mg content of the fruit”
t0“cucumbers”
e1“With 100% NO3”
Claim · model-written summary
Full nitrate increased calcium in cucumber fruit, leaves, stems and roots.
- Taxon
- CucumberCucumis sativust0
- Treatment
- 100% NO3e1
- Outcome
- Ca levels in fruit, leaves, stems and rootse0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a large increase in Ca levels in fruit, leaves, stems and roots.”
t0“cucumbers”
e1“With 100% NO3”
Claim · model-written summary
At least 50% urea increased nitrogen in leaves and roots.
- Taxon
- CucumberCucumis sativust0
- Treatment
- Fifty per cent or more of the N as ureae0
- Outcome
- N content in leaves and rootse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fifty per cent or more of the N as urea significantly increased the N content in leaves and roots”
t0“cucumbers”
e1“With 100% NO3”
Claim · model-written summary
At least 50% urea increased phosphorus in all tissues.
- Taxon
- CucumberCucumis sativust0
- Treatment
- Fifty per cent or more of the N as ureae0
- Outcome
- P in all tissuese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fifty per cent or more of the N as urea significantly increased the N content in leaves and roots, P in all tissues”
t0“cucumbers”
e1“With 100% NO3”
Claim · model-written summary
At least 50% urea increased fruit potassium.
- Taxon
- CucumberCucumis sativust0
- Treatment
- Fifty per cent or more of the N as ureae0
- Outcome
- K in fruite0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fifty per cent or more of the N as urea significantly increased the N content in leaves and roots, P in all tissues, K in fruit”
t0“cucumbers”
e1“With 100% NO3”
Claim · model-written summary
At least 50% urea increased magnesium in fruit and leaves.
- Taxon
- CucumberCucumis sativust0
- Treatment
- Fifty per cent or more of the N as ureae0
- Outcome
- Mg in fruit and leavese0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fifty per cent or more of the N as urea significantly increased the N content in leaves and roots, P in all tissues, K in fruit and Mg in fruit and leaves.”
t0“cucumbers”
e1“With 100% NO3”
Claim · model-written summary
Ammonium decreased potassium, calcium and magnesium in all tissues.
- Taxon
- CucumberCucumis sativust0
- Treatment
- Ammoniume0
- Outcome
- K, Ca and Mg content of all tissuese0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ammonium as an N form decreased the K, Ca and Mg content of all tissues.”
t0“cucumbers”
e1“With 100% NO3”
Claim · model-written summary
Ammonium toxicity occurred above 50% of solution nitrogen.
- Taxon
- CucumberCucumis sativust0
- Outcome
- Ammonium toxicitye0
- Qualifier
- more than 50% of the N in the solutione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ammonium toxicity and necrotic effects of urea were observed when they represented more than 50% of the N in the solution.”
t0“cucumbers”
e1“With 100% NO3”
Claim · model-written summary
Urea caused necrotic effects above 50% of solution nitrogen.
- Taxon
- CucumberCucumis sativust0
- Outcome
- necrotic effects of ureae0
- Qualifier
- more than 50% of the N in the solutione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Ammonium toxicity and necrotic effects of urea were observed when they represented more than 50% of the N in the solution.”
t0“cucumbers”
e1“With 100% NO3”
Claim · model-written summary
Two cucumber cultivars generally did not differ significantly in response to nitrogen forms.
- Taxon
- CucumberCucumis sativust0
- Outcome
- response of two cultivars to N formse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In general, there were no significant differences in the response of two cultivars to N forms.”
t0“cucumbers”
e1“With 100% NO3”
Claim · model-written summary
Nitrogen form should be considered when using plant nitrogen percentage and other minerals to assess nitrogen status.
- Taxon
- CucumberCucumis sativust0
- Outcome
- effect of N form on the percentage of N as well as other essential minerals must be considerede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When using the N content of a plant to determine the N status of plant tissue, the effect of N form on the percentage of N as well as other essential minerals must be considered.”
t0“cucumbers”
e1“With 100% NO3”
The same questions in other papers
nitrogen · growth · Cucumis sativus (cucumber)Positive and negative results
20 papers in the same direction as this paper · 17 in the opposite direction
- negative
- negative
- negative
34 papers more in this group
See all 38 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.