Accumulation of phosphorus in cultivated soils phosphate phase, sorption and desorption properties

耕作土壤磷相的磷积累、吸附和解吸特性

• 批准号: 02453119
• 负责人: NANZYO Masami
• 金额: $ 3.71万
• 依托单位: TOHOKU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-02453119/
• 关键词: cultivated soil; phosphorus; phosphorus accumulation; active aluminum; allophane; Andisol; exchangeable cation; reducing agent; 火山灰土壌; 沖積土; スポドリル; リン酸カルシウム; リン酸マグネシウム; 荷電収支; 溶解度積; リン酸イオン; 収着; 脱着; 配位子交換; 物質収支; リン酸肥料

This report consists of the following three points. 1. Mechanism of phosphate sorption and desorption of Andisols Clay fractions of six allophanic and nonallophanic andisols from northeastern Japan were used to determine the reactions associated with phosphate sorption. When phosphate was sorbed on these materials, aluminum dissolved in the solution at low pH precipitated, the amount positive charge decreased, pH rose, silicate and organic matter was released and the amount negative charge was increased. Contribution of the individual reactions depends on the type soils, pH and the amount of phosphate sorbed.When phosphate was desorbed from these materials, the amount of negative charge was decreased. 2. Mechanism of phosphate sorption on smectic soilsCultivated smectic soils contain large amount of exchangeable Ca and Mg though the contents of active aluminum and iron are much less than those for Andisols. These exchangeable cations react with phosphate to form CaHPO_4.2H_2O and MgNH_4PO_4._2O at around pH 7.3. Release of phosphate from phosphated hydrous iron oxide using organic reducing agentsReducing agents having chelating effect such as chatecol and ascorbic acid showed higher effect for phosphate release from phosphated hydrous iron oxide than those without chelating effect.

这份报告包括以下三点。1.安地松粘土对磷的吸附与解吸机理以日本东北部六种不透水和不透水的安地酚粘土馏分为材料，研究了与磷酸盐吸附相关的反应。当磷酸盐在这些材料上吸附时，铝在低pH时溶解在溶液中析出，正电荷量减少，pH升高，硅酸盐和有机物释放出来，负电荷量增加。单个反应的贡献取决于土壤类型、pH和吸附的磷酸盐的数量。当这些材料中的磷酸盐被解吸时，负电荷的数量减少了。2.近晶土对磷的吸附机理栽培近晶土含有大量的交换性钙和镁，但活性铝和铁的含量远低于安第斯土。在pH 7.3左右，这些可交换阳离子与磷酸盐反应生成CaHPO_4.2H_2O和MgNH_4PO_4·_2O。有机还原剂对磷化水合氧化铁中磷的释放具有螯合作用的还原剂，如棕榈酚和抗坏血酸，对磷化水合氧化铁中磷的释放效果比没有螯合作用的要高。

项目成果

南條 正巳・牧野 知之,庄子 貞雄・高橋 正: "スメクタイト質土壌のリん酸吸収系数における交換性イオンの役割ー八郎潟干拓地主壌について" 日本土壌肥料学雑誌. 62. 41-48 (1991)

Masami Nanjo、Tomoyuki Makino、Sadao Shouko 和 Tadashi Takahashi：“可交换离子在蒙脱石土壤磷酸盐吸收系统中的作用 - 关于八郎泻湖开垦土地的主要土壤”《日本土壤与肥料杂志》62. 41-。 48 (1991)

Nanzyo, M., Uhm, T., and Shoji, S.: "Effect of exchangeable cations on the phosphate sorption coefficient of the cultivated soils" Japanese Journal of soil Science and Plant Nutrition. 63-5. 559-565 (1992)

Nanzyo, M.、Uhm, T. 和 Shoji, S.：“可交换阳离子对耕作土壤磷酸盐吸附系数的影响”《日本土壤科学与植物营养杂志》。

M.Nanzyo: "Chemiーsorption of phosphate on Andisols(volcanic ash soils)‐material balance and the sorption productー" Phosphorus Research Bulletin. 1. 471-476 (1991)

M. Nanzyo：“Andisols（火山灰土壤）上磷酸盐的化学吸附 - 物质平衡和吸附产物 -”磷研究公报 1. 471-476 (1991)。

M.NANZYO: "Effects of organic reducing agents on fhe Psorpion Products formed on noncrysta Talline hydrous Fe oxide" Soil Science and Plant Nutritision. 36. 511-514 (1990)

M.NANZYO：“有机还原剂对非晶体塔林水合氧化铁上形成的吸附离子产物的影响”土壤科学和植物营养。

南條 正巳他3名: "スメクタイト質土壌のリン酸吸収係数における交換性イオンの役割" 日本土壌肥料学雑誌. 62. 41-48 (1991)

Masami Nanjo 等 3 人：“可交换离子在蒙脱石土壤磷吸收系数中的作用”日本土壤与肥料杂志 62. 41-48 (1991)。