鉱毒防除剤に対する一考察 : 第1報 硫化物の効果と其の作用に就て

抄録

Experiments were conducted to study the effect and mechanism of sulphide on paddy rice and barley, of mineral pollution soil. The results obtained will be summarized as follows. (1) The sulphide of soda and lime sulphur solution precipitated soluble copper, lead, arsenic salts, to defence its mineral pollution. (2) The sulphide of soda were less effect than lime sulphur solution on paddy rice, but on barley , here effect to be contrariness. It to consider that the paddy rice conform to acidic reaction, but barley to neutral reaction, and sulphide of soda have tendency among soil to acidic, bnt lime sulphur solution gave alkaline reaction to soil. (3) The continuing effect of sulphide to difference by minerals and soil condition, copper sulphide easily oxidized to sulphate by air and moisture, and pad soil state more stable than field state. Sulphide of lead and arsenic sulphide more stable than copper sulphide.