報告書番号

482001

タイトル（和文）

石炭灰埋立地の畑地化に関する研究（第１報）覆土厚と数種作物の生育，特に根の形態に関する根箱実験

タイトル（英文）

STUDY ON THE USE OF COAL ASH RECLAIMED LAND AS A UPLAND-FIELDS (1) -RELATION BETWEEN THE CROP GROWTH, ESPECIALLY DEVELOPMENT OF ROOT SYSTEM AND DEPTH OF COVERED SOIL ON COAL ASH LAYER-

概要 （図表や脚注は「報告書全文」に掲載しております）

石炭灰埋立跡地を畑地として利用する場合の必要覆土厚を解明する目的から，覆土の厚みと数種作物の生育，特に根の発育について，小型根箱を用いて検討した。（１）ベカナ，ニンジンの生育は覆土が厚い程すぐれる傾向にあったが，ホウレンソウの生育は覆土の厚みに影響されなかった。（２）根の伸長は覆土が薄いと下層石炭灰（ＥＰ灰）に阻害され，主根長は，短くなった。（３）根がＥＰ灰を避ける理由として，ＥＰ灰の高い硬度，低い気相率，高いｐＨなどが考えられた。

概要 （英文）

COAL ASH IS USEFUL MATERIAL FOR LAND RECLAMATION. SOIL DRESSING ON THE COAL ASH LAYER IS ONE OF THE USEFUL METHODS TO USE THE COAL ASH RECLAIMED LAND FOR AGRICULTURE. THIS STUDY WAS CARRIED OUT TO OBSERVE THE EFFECT OF COVERED SOIL DEPTH ON THE COAL ASH SURFACE ON THE CROP GROWTH,ESPECIALLY DEVELOPMENT OF ROOT SYSTEM. THREE CROPS,CHINESE CABBAGE,CARROT AND SPINACH WERE PLANTED IN VOLCANOGENOUS LOAM SOIL ON THE COAL ASH SURFACE IN ROOT BOXES WHICH WERE MADE OF ACRYLIC PLATES (20CMX3CMX31CM).DEPTHES OF COVERED SOIL WERE 3CM,6CM,10CM,15CMAND 20CM. THE RESULTS WERE SUMMERIZED AS FOLLOW; 1.GROWTH AND YIELD OFCHINESE CABBAGE AND CARROT WERE INCREASED WITH INCREASING DEPTH OF COVERED SOIL.BUT THAT OF SPINACH WAS NOT AFFECTED BY COVERED SOIL DEPTH. 2.ROOT DEVELOPMENTS OF THREE CROPS WERE INHIBITED BY LOWER COAL ASH LAYER.MAIN ROOT LENGTH AND EDIBLE ROOT LENGTH OF CARROT WERE DECREASED WITHDECREASING DEPTH OF COVERED SOIL. 3.IT CAN BE CONSIDERED THAT THE HARDNESS,HIGH PH,AND LOW AIR RATIO IN COAL ASH LAYER WHICH WERE CAUSED BY PHYSICAL AND CHEMICAL PROPERTIES OF COAL ASH,INTERFERED WITH THE DEVELOPMENT OF ROOT.

報告者

キーワード