一种适合绿地土壤及改良材料pH测定的方法研究

随着城市绿化快速发展,城市绿地土壤急需改良,不同改良材料不断涌现。pH作为土壤或改良材料必测指标其测定方法应统一。本文选取全国不同区域的土壤及不同的改良材料进行了饱和浸提法pH测定研究,并与传统的pH测定方法进行了比较,研究结果表明,饱和浸提法和传统方法测定pH具有较好的相关性,而且饱和浸提法浸提用水中CO2以及放置时间对pH测定没有影响,因此该方法对城市绿地土壤和改良材料pH的测定具有适宜性。

Study on the pH Value Measuring Method of Green-belt Soil and Modified Materials

With the rapid development of urban greening, the urban greening soil need to be modified and a lot of modified materials are springing up. Furthermore, the measuring method of pH value as the essential measure index for soil and modified materials should be unified. Therefore, the pH value of the soils and modified materials selected from different areas in China were determined with the saturation extraction method, and the compare with the traditional methods were also carried. The results showed that the pH values determined by the saturation extraction method and the traditional method had a significant correlation. And the CO2 in distilled water and the extraction time had hardly an effect on the pH value. Thus, the saturation extraction method will be optimum for urban soil and modified materials.