報告書番号

484014

タイトル（和文）

石炭灰混合農地土壌の物理性

タイトル（英文）

PHYSICAL PROPERTIES OF CULTIVATED SOILS ADDED COAL ASH AS AMELIORANT

概要 （図表や脚注は「報告書全文」に掲載しております）

石炭灰を農地土壌の改良資材として利用する目的から，石炭灰をわが国の代表的土壌４種（沖積土，火山灰土，海成砂土，マサ土）に０～５０％混合し，土壌物理的性を検討した。フライアッシュの混合は土性を壌土の方向に変化させ，容積重，固相率を高め，保水力を向上させた。ボトムアッシュの混合は土性を砂土の方向に変化させ，気相率を高め，透水係数を大きくした。海成砂土へのフライアッシュの混合，沖積土，マサ土へのボトムアッシュの混合は，土壌物理性の改良の点で，特に有効であった。

概要 （英文）

THIS STUDY WAS CARRIED OUT TO PROMOTE THE UTILIZATION OF COAL ASH FROM COAL-FIRED POWER PLANT AS SOIL AMENDMENT INPUT BY MIXING WITH AGRICULTURAL LAND.FLY ASH AND BOTTOM ASH WERE MIXED WITH FOUR SOILS(ALLUVIAL SOIL,VOLCANIC ASH SOIL,MASA SOIL,SAND)AT RATES OF 0,10,30,50% BY WEIGHT,RESPECTIVELY.PHYSICAL PARAMETERS SUCH AS SOIL TEXTURE,BULK DENSITY,THREE PHASE OF SOIL,HYDRAULIC CONDUCTIVITY,WATER RETENTION CURVE WERE MEASURED. AT FLY ASH APPLICATION,THERE WERE CONSISTENT INCREASE IN FINE SAND AND SILT RATIO,BULK DENSITY,SOLID RATIO,WATER-HOLDING CAPACITY AND DECREASE IN HYDRAULIC CONDUCTIVITY(EXCEPT ALLUVIAL SOIL).AT BOTTOM ASH APPLICATION,THERE WERE INCREASE INCOARSE SAND RATIO,POROSITY,HYDRAULIC CONDUCTIVITY IN ALL SOILS TESTED. FLY ASH APPLICATION WAS EFFECTIVE TO PHYSICAL PROPERTIES OF SANDY SOIL AND BOTTOM ASH APPLICATION WERE EFFECTIVE TO PHYSICAL PROPERTIES OF ALLUVIAL SOIL AND MASA SOIL.

報告者

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