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土壤有效磷是植物磷素营养的给源,因受土壤条件限制,往往向不利方向转化.因此,缺磷是吉林省耕地土壤普遍存在的问题.植物所利用的磷主要来源于无机磷,而无机磷的可给性与其形态组成有关,在不同土壤中各种形态的磷所占的比例不同,在一定条件下它们又可以相互转化.因此研究磷素形态,对于了解土壤中磷的有效性及其转化具有重要意义.植物吸收的磷素营养又直接来源于土壤溶液,而土壤溶液中的磷和土壤表面吸附的磷处于动平衡状态.Olsen及Watanabe于1957年分别提出土壤表面吸附的磷可以代表对植物有效的磷.尽管施到
Soil available phosphorus is the source of plant phosphorus nutrition, which is often unfavorably transformed due to soil conditions, so phosphorus deficiency is a common problem in arable land in Jilin Province. Phosphorus used by plants mainly comes from inorganic phosphorus, Inorganic phosphorus can be given its shape and composition, in different soil types of phosphorus in different proportions, under certain conditions, they can be transformed into each other. Therefore, the study of phosphorus forms, for understanding the effectiveness of phosphorus in the soil And its transformation is of great significance.Phosphorus nutrition absorbed by plants is directly derived from the soil solution, and phosphorus in soil solution and the phosphorus adsorbed on the soil surface are in a state of equilibrium.Olsen and Watanabe proposed in 1957, phosphorus May represent plant-friendly phosphorus