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黑矾的化学名称叫硫酸亚铁,系黄铁矿提炼硫磺的副产物,易溶于水,约含20％的铁,11.5％的硫。省内阳城、晋城、临汾、介休、阳泉、忻县等地都有出产。我省晋西一带农民有用黑矾作肥料的习惯,一般是与厩肥掺水混合施用,也有直接施到地里的。群众对黑矾肥劲的反映是:黑矾主要可以使土壤疏松和起抓肥的作用。用于粪窖可以杀虫,施入土壤可以驱虫。根据田间试验和室内分析资料,施用黑矾对土壤性质的作用,可以概括如下:
The chemical name of black alum is ferrous sulfate, pyrite is a byproduct of sulfur extraction, soluble in water, containing about 20% iron, 11.5% sulfur. Yangcheng City, Jincheng, Linfen, Jiexiu, Yangquan, Xin County and other places have produced. West Shanxi Province, Shanxi Province, farmers useful black alum as fertilizer habits, generally mixed with manure mixed with water, but also directly applied to the ground. The public’s response to the black alum is: black alum can mainly make the soil loose and play the role of manure. Can be insecticide used in manure pits, applied to the soil can repel insects. According to field trials and laboratory analysis, the effect of applying black alum on soil properties can be summarized as follows: