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应用蒋柏藩、顾益初提出的“石灰性土壤无机磷分级方法”研究了山东省石灰性潮土、褐土、砂姜黑土的无机磷组成、转化和对作物的有效性。结果表明,石灰性土壤无机磷中以Ca10-P占绝对优势,约占无机磷总量的54.52％,其次为O-P,占21.55％,Al-P、Fe-P,Ca8-P分别占5～10％,Ca2-P只有1.08％;在土壤剖面中各级无机磷皆随剖面深度增加而减少;水溶性磷肥施入土壤后,在作物一个生长季节内主要转化成Ca8-P,占全部转化量的50～70％,其次是Ca2-P,占10～30％,Al-P占11～13％,Fe-P很少,占5％左右;在各级无机磷中对作物有效性顺序是Ca2-P>Al-P、Fe-P>Ca8-P>O-P、Ca10-P。
In this paper, the inorganic phosphorus composition, transformation and availability of calcareous alluvial soil, cinnamon soil and lime concretion in Shandong Province were studied using the “Method of Classification of Inorganic Phosphorus in Calcareous Soil” proposed by Jiang Baofan and Gu Yichu. The results showed that Ca10-P accounted for 54.52% of total inorganic phosphorus in calcareous soil inorganic phosphorus, followed by OP, accounting for 21.55%, Al-P, Fe-P and Ca8-P accounted for 5 ~ 10% and Ca2-P only 1.08%. In the soil profile, the inorganic phosphorus at all levels decreased with the increase of profile depth. After the water-soluble phosphate fertilizer was applied to the soil, it was mainly converted to Ca8-P in one growth season of the crop, The amount of Ca2-P accounted for 10-30%, Al-P accounted for 11-13% and Fe-P was very little, accounting for about 5% Is Ca2-P> Al-P, Fe-P> Ca8-P> OP, Ca10-P.