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粉煤灰的颗粒粒径在细砂和粉砂粒级范围内,在物理性状上类似砂壤土或粉砂壤土。粉煤灰的主要成分与土壤类似。粉煤灰化学元素含量的组成,既含有植物所必需的营养元素,也含有对作物有害的元素及放射性物质,如镉、汞、砷、镍、铬、铅、铀、镭等。粉煤灰中可溶性盐的含量在1.1％～3.3％之间,pH值的范围在4.9～12.0之间。我国粉煤灰用于农业已经有二十多年的历史。其内容:①作土壤改良剂,改良粘重土壤,轻度盐碱土及酸性土壤;②作填充料,
The particle size of fly ash is in the range of fine sand and silt grade, and similar in physical properties to sandy loam or silt loam. The main components of fly ash are similar to soil. The composition of fly ash’s chemical element content not only contains the necessary nutrients for plants, but also contains elements harmful to the crop and radioactive materials such as cadmium, mercury, arsenic, nickel, chromium, lead, uranium, and radium. The content of soluble salt in fly ash was between 1.1% and 3.3%, and the pH range was between 4.9 and 12.0. China’s fly ash has been used in agriculture for more than 20 years. Its content: 1 as a soil conditioner, modified heavy soil, light saline soil and acidic soil; 2 as filler,