Claim · model-written summary
Three-year calcium leaching was 23 kg ha−1 after whole-tree versus 28 after stem-only harvesting.
- Treatment
- whole-tree harvestinge0
- Outcome
- Cae0
- Direction
- lowerinferrede0
- Value
- 23e0
- Qualifier
- 9, 0.1, 7, 28 and 9 kg ha –1e0
- Comparator
- stem-only harvestinge0
Not reportedTaxonMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleSetting
Verbatim
e0“In the first 3 yr following harvesting, leaching losses after whole-tree harvesting were 4, 0.2, 8, 23 and 7 kg ha –1 of N, P, K, Ca and Mg, respectively, as compared with 9, 0.1, 7, 28 and 9 kg ha –1 of N, P, K, Ca and Mg after stem-only harvesting.”
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 51 kg ha−1 potassium 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 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.