Claim · model-written summary
Urea caused necrotic effects above 50% of solution nitrogen.
- Taxon
- Cucumber
Cucumis sativust0 - Outcome
- necrotic effects of ureae0
- Qualifier
- more than 50% of the N in the solutione0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValue
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”
Title
R. Alan Journal of Horticultural Science 1989. doi:10.1080/14620316.1989.11515979
Other claims from this paper (15)
- Intervention effect Nitrate increased dry weights of cucumber fruit, leaves and roots.
- Intervention effect Ammonium decreased dry weights of cucumber fruit, leaves and roots.
- Intervention effect At least 50% ammonium increased nitrogen content of cucumber fruit, leaves, stems and roots.
- Intervention effect At least 50% ammonium increased phosphorus in cucumber fruit, leaves and stems.
- Intervention effect Nitrate decreased nitrogen and phosphorus content throughout cucumber plants.
- Intervention effect Full nitrate increased fruit potassium and magnesium content.
- Intervention effect Full nitrate increased calcium in cucumber fruit, leaves, stems and roots.
- Intervention effect At least 50% urea increased nitrogen in leaves and roots.
- Intervention effect At least 50% urea increased phosphorus in all tissues.
- Intervention effect At least 50% urea increased fruit potassium.
- Intervention effect At least 50% urea increased magnesium in fruit and leaves.
- Intervention effect Ammonium decreased potassium, calcium and magnesium in all tissues.
- Observation Ammonium toxicity occurred above 50% of solution nitrogen.
- Observation Two cucumber cultivars generally did not differ significantly in response to nitrogen forms.
- Recommendation Nitrogen form should be considered when using plant nitrogen percentage and other minerals to assess nitrogen status.