Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: characterization of phosphorus fractions in natural and fertilized forest soils. | 89 Ann. For. Sci. 58 2001 89-98 INRA EDP Sciences 2001 Original article 31P-NMR characterization of phosphorus fractions in natural and fertilized forest soils María-Belén Turrión Juan F. Gallardob Ludwig Haumaierd María-Isabel Gonzálezc Wolfgang Zechd a University of Valladolid . Area de Edafología y Química Agrícola 34004 Palencia Spain b . Aptdo. 257 37071 Salamanca Spain c University of Salamanca Area de Edafología 37080 Salamanca Spain d Institute of Soil Science and Soil Geography University of Bayreuth 95440 Bayreuth Germany Received 13 December 1999 accepted 3 April 2000 Abstract - The amount quality and turnover of soil P is influenced by climate and changes in soil management. The objectives of this study were to evaluate the influence of edaphic properties mean annual precipitation and P-fertilization on soil organic P. 31P-NMR spectroscopy was applied to investigate P forms of forest soils of the Central Western Spain. The concentrations of NaOH-extractable inorganic-P were significantly higher in fertilized than in natural soils. Monoester-P was the dominant organic-P species in both natural and fertilized soils representing between 19 and 54 of NaOH-extractable P. The highest concentrations of monoester-P were observed in the soil with higher content of Fe oxides. The high charge density of monoester-P allows rapid adsorption on soil minerals and extensive interaction with sesquioxides that protect inositols from degradation. Diester-P represented between 3 and 17 of alkali-extractable P reflecting a relatively low microbial activity in the soils on schists with a high content of Al and Fe oxides. organic P P-fertilization forest soil diester-monoester-P 31P-NMR Résumé - Caractérisation du phosphore et de ses fractions par la technique du NMR dans des sols forestiers fertilises et nonfertilises. La teneur la qualité et le turnover du P du sol sont iníluencés par le climat et les changements dans la gestion du sol. L objectif de cette .
