Fransson, Ann-Mari
- Lund University
Abstract
Sedimentary phosphorus, superphosphate, and wood-ash, as well as either sedimentary phosphorus, superphosphate or ash combined with lime, were distributed in selected plots in an 80-yr-old Norway spruce forest [Picea abies (L.) Karst]. After 2 yrs, the sedimentary phosphorus had increased the oxalate/oxalic acid-extractable P in the O-horizon, and the superphosphate had increased the oxalate/oxalic acid-extractable P in the E-horizon. At first, the percolation water from the superphosphate treatment showed high P concentrations. It soon returned to control levels, however. The percolation water from the sedimentary phosphorus treatment gradually showed increased phosphate concentrations. The wood-ash increased neither the amount of extractable P nor the P concentration in the percolation water. The oxalate/oxalic acid-extractable P from the sedimentary P treatment was reduced by liming. The P concentration in the percolation water also tended to be reduced. This was perhaps due to formation of Ca phosphates in the vicinity of the lime particles. In addition, if the solubility rate was similar to the uptake rate, it could account for the decreased P concentration.
Keywords
extraction; fertilization; liming; percolation water; phosphorus; solubility; spruce
Published in
Scandinavian Journal of Forest Research
1999, volume: 14, number: 6, pages: 538-544
Publisher: SCANDINAVIAN UNIVERSITY PRESS
SLU Authors
UKÄ Subject classification
Soil Science
Ecology
Forest Science
Publication identifier
- DOI: https://doi.org/10.1080/02827589908540818
Permanent link to this page (URI)
https://res.slu.se/id/publ/51829