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化肥按酸碱性可分为化学酸碱性和生理酸碱性两种。在购买和使用化肥时,要了解化肥的酸碱性,以便合理施用,提高肥效。土壤酸碱度既能直接影响土壤中养分的溶解和沉淀,又能影响微生物的活动,间接影响土壤养分的有效性。在酸性土壤中,可溶性磷易与铁、铝化合,形成磷酸铁、磷酸铝而降低有效性。土壤中的交换性物质会使钾、钙、镁等营养元素被氢离子置换出来,一旦遇到雨水,被置换出的营养元素就会流失掉。酸性土壤也往往缺硫和钼。因此,酸性土壤
According to acid-base chemical fertilizer can be divided into two kinds of chemical and physical pH and physiological acid-base. In the purchase and use of fertilizers, we must understand the acid-base fertilizers in order to rational application, improve fertilizer efficiency. Soil pH can directly affect the dissolution and precipitation of nutrients in the soil, but also affect the activity of microorganisms, indirectly affecting the effectiveness of soil nutrients. In acid soils, soluble phosphorus is easily combined with iron and aluminum to form iron phosphate and aluminum phosphate to reduce effectiveness. Exchangeable substances in the soil will potassium, calcium, magnesium and other nutrients replaced by hydrogen ions, in the event of rain, the nutrients will be displaced out. Acid soils are also often deficient in sulfur and molybdenum. Therefore, acidic soil