報告書番号

483017

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２）－火山灰土壌における数種野菜の生育，無機成分，土壌の理化学性－

タイトル（英文）

GROWTH OF THE CROPS ON THE FLY ASH-TREATED SOILS (2) -GROWTH AND MINERAL NUTRITION OF SEVERAL VEGETABLES IN VOLCANIC ASH SOIL AND CHANGE IN THE PHYSICAL AND CHEMICAL COMPOSITION OF THE SOIL

概要 （図表や脚注は「報告書全文」に掲載しております）

石炭火力発電所から得られる微粉炭燃焼灰を，農地土壌の改良資材として利用する目的から，火山灰土壌に石炭灰（フライアッシュ）を混合し，数種の野菜の生育，養分吸収と土壌の理化学性について検討した。火山灰土壌に石炭灰を１０～３０％混合すると，ｐＨ，ＥＣ，カルシウム，ホウ素濃度などが高まり，ダイコン，ジャガイモ，ダイズ，ホウレンソウなどの生育，収量が増加した。これら野菜の生育促進要因としては，石炭灰混合による土壌ｐＨの調整，生育必須成分（特にホウ素，モリブデン）の吸収促進，土壌物理性の調整（有効水分の増加）などが考えられた。

概要 （英文）

THIS STUDY WAS CARRIED OUT TO PROMOTE THE UTILIZATION OF FLY ASH FROM COAL-FIRED POWER PLANT AS SOIL AMENDMENT INPUT BY MIXING WITH VOLCANIC ASH SOIL. GROWTH AND MINERAL ABSORPTION IN SEVERAL VEGETABLES AND THE CHANGE IN PHYSICAL AND CHEMICAL COMPOSITION OFMIXED SOILS WERE INVESTIGATED. EXPERIMENTS WERE CONDUCTED IN OUTDOOR LYSIMETERS(1.8MX1.8MX0.5M),VOLCANIC ASH SOIL WAS MIXED WITH FLY ASH AT 0,10,30 AND 50% BY WEIGHT,JAPANESE RADISH,TOMATO,CABBAGE,POTATO,SOYBEAN AND SPINACH WERE SEQUENTIALLY GROWN FOR 3 YEARS. 1.THE GROWTH AND YIELDOF JAPANESE RADISH, POTATO,SOYBEAN AND SPINACH INCRESED IN FLYASH-TREATED SOIL,WHILE THOSE OF TOMATO AND CABBAGE SHOWED NO SIGNIFICANT CHANGES. GROWTH REDUCTION IN THESE CROPS WAS NOT OBSEVED IN FLY ASH-TREATED SOIL. 2.THE PH,EC,EXCHANGEABLE CA,AND B OF SOIL INCREASED BY THE FLY ASHTREATMENT. TOTAL N,CU AND MO IN SOIL DECREASED, HOWEVER,HG,PB AND SE DID NOT CHANGE. 3.THE B CONTENT IN PLANT REMARKABLY INCREASED WITH FLY ASH TREATMENT. CONTENTS OF MO AND AS ALSO TENDED TO INCREASE,HOWEVER,MN,FE,CD TENDED TO DECREASE. THE CONTENT OF OTHER ELEMENT(N,P,K,CA,S,CU,CR,HG,PB,SE,V)IN TISSUES DID NOT CHANGE SIGNIFICANTLY. 4.BULK DENSITY OF SOIL INCREASED WITH FLY ASH TREATMENT,THEREFORE,SOLID RATIO INCREASED BUT AIR RATIO DECREASED. IN THIS CASE WATER PERMEABILITY DECREASED,BUT CAPILLARY WATER INCREASED. 5. INCREASES IN GROWTH OF CROPS SEEMED TO BE DUE TO INCREASES IN PH,B AND MO ABSORPTION,AND THE OPTIMIZATION OF SOILSTRUCTURE BY MIXING 10 OR 30% OF FLY ASH,AS B EXCESS AND CONSIDERABLE REDUCTION OF AIR RATIO IN SOIL WERE FOUND IN FLY ASH 50% MIXTURE.

報告者

キーワード