若干臺灣農地土壤鉀的比率律之研究

Abstract

本試驗乃以台灣五種不同酸鹼度的農地土壤為材料，探討在不同水分含量情況下，其K-（Ca+Mg）活性比的變化情形，結果顯示，隨著土壤水分含量的增多，土壤溶液K離子及（Ca+Mg）離子濃度有下降趨勢，但其K-（Ca+Mg）的活性比變化並不大，此顯示所試驗的五種土壤皆符合比率律。 Five farm soils of different pH were used to study the change in K-Ca activity ratio with the change in soil / water ratio. Results show that concentrations of K and Ca+Mg in soil solution decreased with the decrease in soil/water ratio, but the K-(Ca+Mg) activity remained practically constant, which is predicted by the ratio law.