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首页> 外文期刊>日本土壤肥料学雑誌 >Acidity of Japanese cultivated Andosols and significance of exchange acidity y1 in their classification
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Acidity of Japanese cultivated Andosols and significance of exchange acidity y1 in their classification

机译：日本栽培Andosols的酸度及其交换酸度y1的分类意义

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摘要

The acidity of Japanese cultivated Andosols and significance of exchange acidity y1 in their classification were examined with special reference to soil colloidal composition: allophanic Andosols and non-allophanic Andosols. The mean values of the soil pH for topsoil and subsoil in allophanic Andosols were 6.0±0.6 and 5.9±0.7, respectively, and for topsoil and subsoil in non-allophanic Andosols, 5.8±0.6 and 5.5±0.8, respectively. The soil pH of topsoil for both types of Andosols was higher than that for subsoil values, ranging from 0.1 to 0.3. Out of 610 cultivated allophanic Andosols, 28 soils with an exchange acidity of y1>=6 were found. On the other hand, out of 317 cultivated non-allophanic Andosols, 239 soils with an exchange acidity of y1<6 were found. Compared with the database of The Soil Information System, the ratio of strong acid soil to non-cultivated Andosols in each prefecture was relatively high, ranging from 3 to 93%. The liming of the plough layer soil was done well for both allophanic Andosols and non-allophanic Andosols. The 292 cultivated Andosols were divided into two groups by exchange acidity y1 in the subsurface soil following The Classification of Cultivated Soils (The 3rd approximation): Group 1 (y1<5) and Group 2 (y1>=5). In Group 1, there were 242 soils: 202 soils, or 83%, were allophanic Andosols; and 40 soils, or 17%, were non-allophanic Andosols. In Group 2, there were 50 soils: 21 soils, or 42%, were allophanic Andosols; and 29 soils, or 58%, were non-allophanic Andosols. The exchange acidity y1 of the cultivated Andosols was not closely related to the clay mineral composition. It is concluded that a criterion for non-allophanic Andosols in cultivated soils should reflect soil colloidal compositions using analytical data for amorphous materials.
机译：专门研究了土壤胶体成分：同种异体和不同相的土壤胶体成分，研究了日本栽培的Andosols的酸度和交换酸度y1在分类中的意义。脲基甲壳素的表层土壤和底土的土壤pH平均值分别为6.0±0.6和5.9±0.7，非钙基甲壳素的表土和基底土壤的pH值分别为5.8±0.6和5.5±0.8。两种类型的Andosols的表层土壤pH值均高于下层土壤的pH值，范围为0.1至0.3。在610种耕作的脲基甲酚中，发现28种土壤的交换酸度为y1> = 6。另一方面，在317种耕作的非高岭土雄性土壤中，发现239个土壤的交换酸度为y1 <6。与“土壤信息系统”的数据库相比，每个州的强酸性土壤与未耕作的雄激素的比例相对较高，为3％至93％。不论是同种异型的Andosols还是非Alphanphanic的Andosols，耕层土壤的增材效果都很好。根据耕种土壤的分类（第3次近似），通过在地下土壤中交换酸度y1将292种耕作的Andosols分为两组：第1组（y1 <5）和第2组（y1> = 5）。在第1组中，有242种土壤：202种土壤（占83％）是同种异体的Andosols。有40种土壤（占17％）是非高岭土的Andosols。在第2组中，有50种土壤：21种土壤（占42％）是同种异体的安哥拉溶胶;其他土壤是土壤。有29种土壤（占58％）是​​非alophanic的Andosols。栽培的Andosols的交换酸度y1与粘土矿物组成没有密切关系。结论是，使用无定形物质的分析数据，在耕作土壤中非卤代雄激素的标准应反映土壤胶体成分。

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