Claim · model-written summary
Stem-only harvesting removed 51 kg ha−1 potassium in biomass.
- Taxon
- white birch
Betula pendulat0 - Treatment
- Stem-only harvestinge0
- Outcome
- Ke0
- Value
- 51e0
- Qualifier
- kg ha –1e0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stem-only harvesting removed 126, 9, 51, 126 and 23 kg ha –1 of N, P, K, Ca and Mg in biomass, respectively.”
t0“white birch”
Title
Brian D. Titus; Bruce A. Roberts; Keith W. Deering Canadian Journal of Soil Science 1998. doi:10.4141/s97-044
Other claims from this paper (19)
- Mechanism More intensive harvesting caused proportionately greater biomass nutrient losses by removing nutrient-rich branches and foliage.
- Observation Stem-only harvesting removed 126 kg ha−1 nitrogen in biomass.
- Observation Stem-only harvesting removed 9 kg ha−1 phosphorus in biomass.
- Observation Stem-only harvesting removed 126 kg ha−1 calcium in biomass.
- Observation Stem-only harvesting removed 23 kg ha−1 magnesium in biomass.
- Intervention effect Whole-tree harvesting increased biomass removal by 19% versus stem-only harvesting.
- Intervention effect Whole-tree harvesting increased nitrogen removal by 127%.
- Intervention effect Whole-tree harvesting increased phosphorus removal by 138%.
- Intervention effect Whole-tree harvesting increased potassium removal by 151%.
- Intervention effect Whole-tree harvesting increased calcium removal by 72%.
- Intervention effect Whole-tree harvesting increased magnesium removal by 90%.
- Intervention effect Deep-percolation nutrient losses were generally greater after stem-only than whole-tree harvesting during three years.
- Mechanism Greater leaching may reflect slash leaching, mineralization beneath slash and delayed successional vegetation nutrient sinks.
- Intervention effect Three-year nitrogen leaching was 4 kg ha−1 after whole-tree versus 9 after stem-only harvesting.
- Intervention effect Three-year phosphorus leaching was 0.2 kg ha−1 after whole-tree versus 0.1 after stem-only harvesting.
- Intervention effect Three-year potassium leaching was 8 kg ha−1 after whole-tree versus 7 after stem-only harvesting.
- Intervention effect Three-year calcium leaching was 23 kg ha−1 after whole-tree versus 28 after stem-only harvesting.
- Intervention effect Three-year magnesium leaching was 7 kg ha−1 after whole-tree versus 9 after stem-only harvesting.
- Observation Leachate nutrient losses were generally small compared with biomass-removal losses.