Relation between process of oxidation of sulfur compounds and water content in a coastal muddy soil.

沿海泥质土壤中硫化合物氧化过程与含水量的关系。

• 批准号: 02660238
• 负责人: ADACHI Tadashi
• 金额: $ 1.22万
• 依托单位: Okayama University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02660238/
• 关键词: Acid sulfate soil; Muddy soil; Sulfur compound; Soil microorganism; Soil pH; Water content (pF); 海成粘土; 乾燥; 土壌水分

The relation between the process of oxidation of sulfur compounds and the water content(water moisture suction)in a coastal muddy soil was examined.The concentration of sulfuric ions increased with the progressing of oxidation of sulfur compounds containing in pyrite etc. and consequently the soil pH decreased in the coastal muddy soil. The treatment of salt removal enhanced the activity of microorganisms participating sulfur oxidation and formation of sulfuric ions. Actually, the soil pH decrease was occurred more greatly in the soil containing lower salt concentration.In spite of the difference of the soil pF values, the soil pH decreased from 7.6 to 3.0 - 4.0, after two years drying of the soil. Especially, the oxidation of sulfur compounds occurred at the pF values of 4.0 to 4.4 and the lowest pH was observed at the pF 2.8.Accordingly, we concluded that the decrease of soil pH in a coastal muddy soil was mainly occurred by microorganisms which oxidize sulfur compounds under the condition of higher-water than pF 3.0.

检查了硫化化合物的氧化过程与沿海泥土中的水含量（水分吸力）之间的关系。硫离子的浓度随含硫酸黄铁矿等含硫化合物的氧化的进展而增加，因此，沿海泥土中土壤pH值降低。去除盐的处理增强了参与硫氧化和硫酸离子形成的微生物的活性。实际上，在含有较低盐浓度的土壤中，土壤pH值降低了。尽管土壤PF值差异，土壤pH值在两年的土壤干燥后从7.6降至3​​.0-4.0。尤其是，硫化合物的氧化发生在4.0至4.4的PF值时发生，并且在PF 2.8处观察到最低的pH值。相应地，我们得出的结论是，在沿海泥土中，在微生物中，在沿海泥土中，土壤pH值的减少主要是由微生物在比Pf 3.0更高的硫酸盐状态下氧化硫化合物的氧化。

项目成果

T. Adachi: "Relation between process of oxidation of sulfur compounds and water content in a coastal muddy soil. (Communicated)" Transactions of the Japanese Society of Irrigation. Drainage And Reclamation Engineering.

T. Adachi：“硫化合物的氧化过程与沿海泥质土壤中的水含量之间的关系。（已通讯）”日本灌溉协会汇刊。

足立 忠司: "土壌水分から見た酸性硫酸塩土壌化過程" 農業土木学会論文集.

足立正：“从土壤湿度看酸性硫酸盐土壤的形成过程”，日本农业土木工程学会汇刊。