Utilization of Blast Furnace Slag Quenched with Water as a Source of Silicate Fertilizer -II. Effect of Particle Size Distribution of Quenched Slag on Rice Yields

급랭광재(急冷鑛滓)의 비료화(肥料化)에 관(關)한 연구(硏究) -II. 수도(水稻)에 대한 급랭광재(急冷鑛滓)의 입도별(粒度別) 비효(肥效)

  • Published : 1985.06.25

Abstract

The objective of this study was to attest the feasibility of the utilization of the blast furnace slag, quenched with water as a source of silicate fertilizer. A pot experiment was conducted to evaluate the effect of quenched slag and its particle size distribution on rice plant growth over the corresponding air-cooled slag of milled commercial silicate fertilizer. The yields of rice were slightly higher in quenched slag than in the commericial air-cooled slag, however, no significant statistical difference was observed. The silica content of rice plants through the growing period was high in quenched slag in any tested particle sizes. This indicated that the quenched slag might release silica fastly in soil. On the other hand, the available silica content retained in soil was high in air cooled slag, which implied that the silica of air-cooled slag was low acting. The results suggested that the quenched slag may be potentially utilized as a source of silicate fertilizer.

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