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粉煤灰是煤燃烧后的废渣。如在农业上加以合理利用,将会取得很好的经济效益和社会效益。 1 粉煤灰的作用 1.1 可做肥料施。据测定,粉煤矿灰中含钙1％、钾1.8％、磷0.66％、钠0.27％、镁0.16％、铁2％、铜32毫克/千克、锌26毫克/千克、锰300毫克/行克,所以可做为缺乏这些元素的土壤的补给肥源。 1.2 可提高地温。土壤中施粉煤灰的5～10厘米的土层内,可提高地温0.7℃～2.4℃。
Fly ash is the waste of coal after combustion. If used reasonably in agriculture, it will achieve very good economic and social benefits. 1 the role of fly ash 1.1 can do fertilizer facilities. It has been determined that the pulverized coal ash contains 1% calcium, 1.8% potassium, 0.66% phosphorus, 0.27% sodium, 0.16% magnesium, 2% iron, 32 mg / kg copper, 26 mg / kg zinc and 300 mg / , So can serve as a source of fertility for the soil lacking these elements. 1.2 can increase the ground temperature. Soil in the fly ash 5 to 10 cm of soil, can increase the ground temperature 0.7 ℃ ~ 2.4 ℃.