Claim · model-written summary
Seedlings on the former red alder site showed a 65% biomass increase in current twigs compared with former Douglas-fir sites.
- Taxon
- Douglas-fir
Pseudotsuga menziesiie0 - Organ / stage
- current twigse1
- Treatment
- former red alder sitee1
- Outcome
- biomasse1
- Direction
- increasee1
- Value
- 65%e1
- Comparator
- former Douglas-fire2
Not reportedMaterialGeneCompoundInteractorInteractor roleSecond interactorSecond interactor roleSettingQualifier
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”
e1“The seedlings grown on the former red alder site showed a 65% biomass increase in current twigs, 41% increase in older twigs, and 45% increase in stems”
e2“comparing two adjacent plots of seedlings planted on former Douglas-fir and red alder sites”
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 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 Seedlings on the red alder site had higher N/P and N/K ratios.
- 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.