石灰性土壤有着显著的固磷作用,不仅固定速率快,而且固定数量大。但固定强度并不十分严重。所谓同磷作用,乃指施入土壤的各种含磷化合物从可溶性或速效性状态转变为不溶性或缓效性状态而言。固磷作用的强弱常常以同磷能力来说明。石灰性土壤固磷能力的测定,一般认为以0.5MNaHCO_3溶液所不能浸提出来的磷素数量来衡量比较妥当。石灰性土壤中的碳酸钙在固磷作用中起着多大的作用?关于这个问题,许多土壤农 Calcareous soil has a significant role in phosphorus fixation, not only fixed rate, but also a large number of fixed. But the fixed strength is not very serious. The so-called role of phosphorus, refers to the various phosphorus-containing compounds applied to the soil from soluble or fast-acting state into insoluble or slow-acting state. The strength of phosphorus fixation often with the ability to explain. Calcareous soil phosphorus fixation ability, generally considered 0.5MNaHCO3 solution can not be extracted from the amount of phosphorus to measure more appropriate. What is the role of calcium carbonate in calcareous soils in the fixation of phosphorus? In this issue, many soils