Low‐Molecular‐Weight Organic Acids in Selected Forest Soils of the Southeastern USA

摘要: Organic acids can form stable complexes with metals and therefore affect metal solubility speciation. The low-molecular-weight aliphatic organic extracted in water present soil solution from O, A, Bh Bt horizons a group of forested Utlisols, Entisols Spodosols were identified by high performance liquid chromatography (HPLC). Oxalic acid was found all samples generally the highest concentrations. Oxalate concentrations ranged 25 to 1000 greater horizon soils than A soil. High formic also most soils, ranging 5 174 solution. Trace amounts citric, acetic, malic, lactic, aconitic, succinic detected some samples. In greenhouse pot study, rhizosphere slash pine (Pinus elliottii Engelm.) seedlings growing Bh, an Ultic Haplaquod compared nonrhizosphere observed approximately order magnitude native soils. only suite more complex bulk rhizosphere, both oxalate formate detected, along trace aconitic acids. Since forms Al, presence large may P availability these View complete article To view this article, insert Disc then click button8