Claim · model-written summary
High N seedlings initially acquired most N from nitrate, whereas low N seedlings acquired most from N2 fixation.
- Taxon
- black locust
Robinia pseudoacaciae0 - Outcome
- acquired most of their N from NO 3 −e1
- Comparator
- those receiving lower Ne1
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentSettingDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“black locust ( Robinia pseudoacacia L.)”
e1“Seedlings receiving higher N also acquired most of their N from NO 3 − , whereas those receiving lower N acquired most from N 2 fixation”
Title
Kurt H. Johnsen; Bruce C. Bongarten Physiologia Plantarum 1992. doi:10.1111/j.1399-3054.1992.tb05266.x
Other claims from this paper (12)
- Intervention effect High nitrate seedlings grew faster early.
- Intervention effect High nitrate seedlings acquired more N early.
- Intervention effect High nitrate seedlings had higher internal nitrogen concentrations early.
- Intervention effect High nitrate seedlings had higher nitrogen productivity early.
- Intervention effect Later, growth rate, internal N and nitrogen productivity did not differ by nitrate treatment.
- Observation Midway, high nitrate seedlings began obtaining most N from fixation.
- Intervention effect At the end of the first experiment, high nitrate seedlings had 16% greater dry weight.
- Intervention effect At the end of the second experiment, high nitrate seedlings had 78% greater dry weight.
- Observation Size differences arose during the first half of experiments.
- Mechanism The authors attributed faster high nitrate growth to greater usable N and lower acquisition costs.
- Intervention effect Soil N differences did not change root, stem or leaf biomass allocation.
- Association As soil N became limiting, fixation capacity increased instead of root mass.