Residual Phosphorus Solubility for an Acid, Clayey, Forested Soil in the Presence of Oxalate and Citrate

Effect of available P and phenolics on mineral N release in acidified spruce forest: connection with lignin-degrading enzymes and bacterial and fungal communities

“…Most of the low molecular weight phenolics released by depolymerization have highly reactive ortho-phenolic groups (Comerford and Skinner 1989). When released, they are able to precipitate Al and Fe ions (Northup et al 1995(Northup et al , 1998Comerford and Skinner 1989). Precipitation of Al and Fe by low molecular weight phenolics leads to higher amounts of P OX and greater mineral N release from grasses.…”

“…In high phenolic litter this could be caused by reduced depolymerization rates of lignin, and low molecular weight phenolics were not sufficient for precipitation of Al and Fe ions. It resulted in P being predominantly bound to recalcitrant Al and Fe complexes (Northup et al 1995;Comerford and Skinner 1989). In low phenolic litter (i.e.…”

“…Also, close connection between phenolics and P OX can be caused by the natural properties of phenolics. Most of the low molecular weight phenolics released by depolymerization have highly reactive ortho-phenolic groups (Comerford and Skinner 1989). When released, they are able to precipitate Al and Fe ions (Northup et al 1995(Northup et al , 1998Comerford and Skinner 1989).…”

Impacts of grassland afforestation with coniferous trees on soil phosphorus dynamics and associated microbial processes: A review

“…Root exudates contain a significant amount of low molecular weight organic acids such as citric, oxalic, maleic, and acetic acids (Hoffland et al, 1989;Jones and Darrah, 1994;Jones, 1998;Ström et al, 2005). It is well established that organic acids may increase the availability of sparingly soluble inorganic P minerals by a combination of lower pH and/or metal chelation (Comerford and Skinner, 1989;Fox and Comerford, 1990;Grierson, 1992;Jones and Darrah, 1994). However, little is known about possible dissolution of soil organic P by organic acids (Bar-Yosef, 1996;Jones, 1998;Ström et al, 2002).…”

Availability of residual phosphorus fertilizer for loblolly pine

“…The effectiveness of residual phosphate fertilizer as a source of phosphorus for crop growth has been studied extensively in agriculture (Barrow, 1980) and to a limited extent in forestry of New Zealand (Ballard, 1978;Comerford and Skinner, 1989;Comerford et al, 2002), Australia (Flinn et al, 1982;Gentle et al, 1986;Turner, 1982;Turner andLambert, 1985, 1986;Turner et al, 2002), and southern Africa (Crous et al, 2007). Little information is available as to the effectiveness of residual P fertilizer on the growth of second or third rotation plantations in the southeastern United States (Comerford et al, 2002;Harding and Jokela, 1994;Torbert and Burger, 1984).…”