Claim · model-written summary
Nitrogen fertilizer markedly increased seed yield in coastal dunes.
- Taxon
- Leymus arenarius
Leymus arenariuse1 - Treatment
- nitrogen fertilizerse0
- Outcome
- Seed yielde0
- Direction
- increasede0
- Setting
- coastal dunese0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed yield could be increased dramatically in coastal dunes by the application of nitrogen fertilizers, mainly as a result of increased flowering-spike density.”
e1“Seed of the coastal, dune-building grass Leymus arenarius is harvested from natural stands”
Title
S. Greipsson; A. J. Davy Journal of Applied Ecology 1997. doi:10.2307/2405229
Other claims from this paper (11)
- Intervention effect Nitrogen fertilizer increased flowering-spike density.
- Intervention effect Phosphorus additions provided little short-term advantage.
- Intervention effect Potassium additions provided little short-term advantage.
- Recommendation Rapid-release nitrogen at 50-100 kg ha-1 could produce seed cost-effectively from a smaller dune area or increase seed output.
- Intervention effect Slow-release fertilizer improved seedling establishment during the first two seasons on volcanic sandy barrens.
- Intervention effect Annual rapid-release fertilizer produced similar tiller density and biomass after four years more economically.
- Observation Untreated control seedling populations became extinct over four years.
- Intervention effect Severe phosphorus deprivation increased dry-mass allocation to roots and rhizomes.
- Intervention effect Potassium deprivation increased dry-mass allocation to above-ground parts.
- Intervention effect Fertilizer failed to rejuvenate seed production in moribund late-successional stands.
- Intervention effect Where vegetation responded, fertilizer stimulated competing species at the expense of Leymus arenarius.