Research article - Peer-reviewed, 2013
Phosphorus availability in soils amended with wheat residue char
Parvage, Masud; Ulen, Barbro; Eriksson, Jan; Strock, Jeffrey; Strock, Jeffery; Kirchmann, HolgerAbstract
Plant availability and risk for leaching and/or runoff losses of phosphorus (P) from soils depend among others on P concentration in the soil solution. Water-soluble P in soil measures soil solution P concentration. The aim of this study was to understand the effect of wheat residue char (biochar) addition on water-soluble P concentration in a wide range of biochar-amended soils. Eleven agricultural fields representing dominant soil texture classes of Swedish agricultural lands were chosen. Concentrations of water-soluble P in the soils and in biochar were measured prior to biochar incorporation to soils in the laboratory. Experiments with three dominant soil textures-silt loam, clay loam, and an intermediate loam soil with different rates of biochar addition (i.e., 0.5, 1, 2, and 4 %; w/w) showed that the highest concentration of water-soluble P was achieved at an application rate of 1 %. At higher application rates, P concentrations decreased which coincided with a pH increase of 0.3-0.7 units. When the 11 soils were amended with 1 % (w/w) biochar, water-soluble P concentrations increased in most of the soils ranging from 11 to 253 %. However, much of the water-soluble P added through the biochar was retained (33-100 %). We concluded that wheat residue char can act as a source of soluble P, and low and high additions of biochar can have different effects on soil solution P concentration due to possible reactions with Ca and Mg added with biochar.Keywords
Biochar; Water-soluble phosphorus; Phosphorus saturation; Phosphorus retention; Clay soils; Sandy soilsPublished in
Biology and Fertility of Soils2013, volume: 49, number: 2, pages: 245-250
Publisher: SPRINGER
Authors' information
Parvage, Masud
Swedish University of Agricultural Sciences, Department of Soil and Environment
Ulen, Barbro
Swedish University of Agricultural Sciences, Department of Soil and Environment
Swedish University of Agricultural Sciences, Department of Soil and Environment
Strock, Jeffrey (Strock, Jeffrey)
Swedish University of Agricultural Sciences, Department of Soil and Environment
Strock, Jeffery (Strock, Jeffery)
University of Minnesota
Swedish University of Agricultural Sciences, Department of Soil and Environment
UKÄ Subject classification
Environmental Sciences related to Agriculture and Land-use
Publication Identifiers
DOI: https://doi.org/10.1007/s00374-012-0746-6
URI (permanent link to this page)
https://res.slu.se/id/publ/56190