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《ACTA PEDOLOGICA SINICA》 1998-01
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FORMS OF ALUMINUM IN RED SOILS

Shao Zong-chen; He Qun; Wang Weidun(Institute of Soil Science, Academia Sinica, Nanjing, 210008)  
Extractable noncrystalline aluminum in red soils could be fractionated into exchangeable Al (ExAl), adsorbed inorganic hydroxyr-Al (HyAl), organic complexed Al(OrAl), Fe oxide bound Al (DCBAl), interiayered Al (InAl) and noncrystalline aluminosilicate (NcAl), by the 1 mol / L KCl, 0.2mol / L HCl, 0.1 mol / L Na4P2O7(pH8.5), DCB solution, sodium citrate (0.33 mol / L, pH7.3) and 0.5 mol / L NaOH sequential extraction. All Al forms were characterized by the intrinsic feature in their composition and properties and closely related to the corresponding properties and ecological characteristics of red soils. In the same soil sample the amounts of various Al forms were of the order NcAl InAl DCBAI OrAl HyAl ExAl. With the exception of ExAl content the contents of other five forms of aluminum in the red soils derived from basalt were higher than those from grate. In soils most of the aluminum existed in layer aluminosilicate minerals. Individual extraction of the Al forms in soils was compared with the sequential extraction method.
【Fund】: 国家自然科学基金!49271041;;中国科学院南京土壤研究所土壤圈物质循环开放研究实验室基金
【CateGory Index】: S153
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