地理情報システムを用いた石狩泥炭地における土地利用の変遷と客土の実態解析 : 湿原と泥炭農用地の管理(第3報)

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After conversion from paddy use to upland use, various crops have been cultivated and some problems such as land subsidence have been revealed in Ishikari peatland. We collected basic data about the present status of soil topdressing and land use, and then analyzed these data using a geographic information system (GIS) for consideration of sustainable use of arable peatland. 1) High moor peat soils (Hp, Sphagnofiblists) was the largest in the study area and Low moor peat soils (Lp, Medihemists) was the second. Both soils covered more than 50% of the area. The acreage of soil topdressing and volume of topdressed soil were 221.0km^2 and 26.8×10^6m^3,respectively. The average amount of topdressed soil to arable land was 13.7cm in Hp and 9.2cm in Lp. Based on this value, the total volume of topdressed soil in the Ishikari and Sorachi districts was estimated at 6.8×1O^7m^3. 2) Wetland and upland fields decreased rapidly from the 1950s to the 1960s, while paddy fields increased in the same period and occupied 70% of the area. As a result, arable land was classified under the following 2 types : (l) old developed land, which was used before the 1950s and (2) new developed land, which was developed after the 1950s. 3) The difference in the amount of topdressed soil among continuous upland, continuous paddy, upland converted from paddy and rotated paddy was not significant except for continuous upland. This fact indicates soil topdressing was not carried out according to the land use.
社団法人日本土壌肥料学会の論文
1995-10-05

地理情報システムを用いた石狩泥炭地における土地利用の変遷と客土の実態解析 : 湿原と泥炭農用地の管理(第3報)

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