Claim · model-written summary
Seedlings on the red alder site had higher N/P and N/K ratios.
- Taxon
- Douglas-fir
Pseudotsuga menziesiie0 - Outcome
- N/P and N/K ratiose7
- Direction
- highere7
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“on the biomass and nutrition of Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco) seedlings”
e7“There were also higher N/P and N/K ratios and lower availability of soil P”
Title
Stanislaw Brozek Canadian Journal of Forest Research 1990. doi:10.1139/x90-175
Other claims from this paper (11)
- Intervention effect Seedlings on the former red alder site showed a 65% biomass increase in current twigs compared with former Douglas-fir sites.
- Intervention effect Seedlings on the former red alder site showed a 41% biomass increase in older twigs compared with former Douglas-fir sites.
- Intervention effect Seedlings on the former red alder site showed a 45% biomass increase in stems compared with former Douglas-fir sites.
- Intervention effect Foliage and roots were not significantly affected by the former red alder site.
- Observation Seedlings developed shallower root systems than on the site formerly occupied by Douglas-fir.
- Observation Seedlings developed wider root systems than on the site formerly occupied by Douglas-fir.
- Observation Seedlings on the red alder site showed an increase in N concentration.
- Observation Seedlings on the red alder site showed a decrease in P, Ca and Mg concentrations.
- Observation Soil on the former red alder site had lower availability of soil P.
- Observation Extractable P in soil was depleted at an accelerated rate on the former red alder site.
- Mechanism Nutritional differences and biomass changes in seedlings are attributed in part to N and organic matter accumulated in the soil by the former red alder forest.