在过去三十年的土壤学教材中,对于酸性土壤(特别是红壤)的磷素固定作用异常强调,以为可溶性磷一经施入在强酸性土壤以后,大部分以铝铁磷酸盐沉澱,不能被植物所吸收。同时许多测定土壤有效性磷的方法,在应用于施有大量过磷酸钙的红壤标本上,也得不出有正面的结果。但国内和国外许多田间试验的材料,都与这样的理论和分析结果不相符合。例 In the pedagogy texts of the past three decades, the phosphorus fixation of acidic soils (especially red soils) is exceptionally emphasized, and most of the soluble phosphorus, precipitated by ferro-aluminophosphate once applied to strongly acidic soils, can not be Absorbed by plants. At the same time, many methods for determination of soil available phosphorus did not yield positive results when applied to red soil samples with a large amount of superphosphate. However, many field trials at home and abroad are not consistent with such theoretical and analytical results. example