報告書番号

483019

タイトル（和文）

石炭灰混合土壌における農作物の生育（その５）－各種土壌に対する石炭灰の混合効果－

タイトル（英文）

GROWTH OF CROPS IN SOILS MIXED WITH FLY ASH (5) -EFFECTS OF FLY ASH MIXING ON VARIOUS SOILS-

概要 （図表や脚注は「報告書全文」に掲載しております）

石炭灰の農業面への利用の１つとして石炭灰そのものを農地の土壌改良剤として利用する場合を想定し，酸性土壌の改良効果，石炭灰の種類とホウレンソウの生育，各種土壌に対する石炭灰混合とキュウリ，ハクサイの生育との関係について検討した。石炭灰の主成分はＳｉとＡｌであり，これらについでＣａ，Ｆｅ，Ｍｇ，Ｋが％台で多かった。微量成分のＢは１９０～１０４０ｐｐｍ，Ｍｏは２８～１５４ｐｐｍであり，石炭灰の種類によって異なった。石炭灰の酸度矯正効果は炭カルに比べて低く，多量を必要とした。石炭灰混合土をカラムに充てんし，上部から一定量の水をかん水したところ，石炭灰混合土のＣａ分はかん水によって容易に溶脱された。ホウレンソウの生育は供試石炭灰によって若干異なったが，混合率が低い場合に生育が促進され，混合率が著しく高い場合に生育が不良となった。作物の生育に対して石炭灰の場合量は供試土壌によって異なるので注意を要

概要 （英文）

ONE OF POSSIBLE FORMS OF USE OF FLY ASH IN AGRICULTURE IS THE DIRECT USE AS A SOIL CONDITIONER OF FARMLANDS.THIS RESEARCH EXAMINED THE EFFECT OF FLY ASH ON ACID SOIL INPROVEMENT,THE RELATIONSHIP BETWEEN THE KINDS OF FLY ASH AND THE GROWTH OF SPINACH,THE RELATIONSHIP BETWEEN THE MIXTURE OF FLY ASH IN VARIOUS SOILS AND THE GROWTH OF CUCUMBER OR CHINESE CABBAGE.THE PRINCIPAL COMPONENTS OF FLY ASHES USED IN THE EXPERIMENTS WERE SI AND AL.NEXT TO THEM,THERE WERE MUCH CA,FE,MG AND K,ALL MEASURED IN PERCENTAGE.AS FOR TRACE COMPONENTS,B WAS FROM 190 1040PPM,AND MO WAS FROM 28 TO 154 PPM.THEY VARIED WITH THE KIND OF FLY ASH.ACIDITY CORRECTING EFFET OF FLY ASH WAS EXAMINED BY MIXING INTO ANDOSOL SOIL WHICH WAS MADE ACID WITH SULFURIC ACID.THE ACIDITY CORRECTING EFFECT OF FLY ASH WAS LOW IN COMPARISON WITH CALCIUM CARBONATE AND A LARGE QUANTITY OF FLY ASH WAS REQUIRED.LEACHING TEST WITH COLUMN.THE VALUES OF EC AND CACONCENTRATION DROPPED WITH THE FREQUENCY OF LEACHING.A HIGH POSITIVE CORELATION WAS OBSERVED BETWEEN EC AND CA CONCENTRATION.IN OTHER WORDS,IT WAS FOUND THAT THE CA COMPONENT IN THE SOIL MIXED WITH FLY ASH WAS EASILY LEACHED OUT BY IRRIGATION.THE GROWTH OF SPINACH DIFFERED A LITTLE WITH THE KIND OF FLY ASH USED.IN GENERAL,THE GROWTH WAS PROMOTED WHEN THE MIXING RATIO WAS LOW.WHEN THE MIXING RATIO WASEXTREMELY HIGH,THE GROWTH WAS POOR. THE GROWTH OF CUCUMBER AND CHINESECABBAGE VARIED MARKEDLY WITH THE KIND OF SOILTESTED WHEN FLY ASH WAS MIXED.

報告者

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