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本文对岩棉水浸液的PH变化动态及某些矿质离子的溶出和吸附动态进行了分析,结果表明:岩棉浸入偏酸性水溶液中,会使溶液的PH值迅速上升,一般达PH8.0左右便稳定下来;在这种偏酸性环境下,岩棉中的钙、镁、钾发生较大量的离子溶出,而水中的铁、锰、钠则表现出被岩棉吸附的现象。因此,建议在开发以岩棉为基质的无土栽培或育苗技术中,应充分考虑这方面的特点。
In this paper, the dynamic changes of pH and the leaching and adsorption kinetics of some mineral ions in rockwool aqueous solution were analyzed. The results show that the immersion of rock wool in acidic aqueous solution will rapidly increase the pH value of the solution, usually up to pH 8.0 In this acidic environment, a large amount of ions dissolve out from calcium, magnesium and potassium in rock wool while iron, manganese and sodium in water show the phenomenon of adsorption by rock wool. Therefore, it is recommended that soil rock-wool-based soilless cultivation or seedling raising techniques should fully consider this aspect.