土壌情報システムの断面情報からみた強酸性黒ボク土の分布

概要

論文の詳細を見る
The allophanic Andosols and non-allophanic Andosols are not srparated in the classification system of cultivated soils. But the difference is important from the viewpoint of chemical properties (espcially acidty), soil managemnt and land use. The exchange acidity Yl seem diagnostic in separating the two types. In an approach to separate these two types, we used the database of Soil Information System (JAPSIS), and about 4000 soil profiles of Andosols were separated between 'acid' type (Y1>5) and 'non-acid' types. Acid type of Andosls show a consistent difference in soil properties as well as in land use from 'non-acid' types, and are regarded as non-allophanic Andosols. Since the cultivated soils are heavily limed, the percentage of non-allophanic Andosols must be greater than that of 'acid' type. Regionality of the distribution of these two tyoes was also evident. 'Acid' type dominates in Tohoku, and Sanin regions where non-allophanic Andosols are known to occur widely, and non-acid type is widespread in Hokkaido, Kanto and Kyushu regions. Further information on Yl, particularly of subsurface soils will make us an real estimation possible on the distribution of non-allophanic Andosols.
日本ペドロジー学会の論文
1991-06-30