潮土中各亚类有效磷含量差异较大，潮土亚类含量最高，平均为40.61mg

The content of available phosphorus in subgroups of Chao soil varies greatly. The subgroup content of Chao soil is the highest, with an average of 40.61 mg/kg, and the content of salinized Chao soil is the lowest, with an average of 27.38 mg/kg. The content of effective lin in the subgroup of Chao soil is Chao soil>Saline Chao soil. <br>(2) The available phosphorus content in different types of land. There are significant differences in soil available phosphorus content in different land types. Among them, the vegetable field content is the highest, with an average of 69.35mg/kg, and the variation range is 3.0~271.4mg/kg; followed by the orchard, with an average of 41.24mg/kg, the variation range of 3.0~140.9mg/kg; the grain field content is the lowest, average The content is 36.28mg/kg, the variation range is 2.4~335.1mg/kg, the content is extremely uneven

The effective phosphorus content of each subcategory in the tide soil was different, the highest content of the tidal soil sub-type was 40.61 mg/kg, and the salted tide soil content was the lowest, with an average of 27.38 mg/kg. The effective in-the-middle of the tidal soil-to-tidal soil- and salted-tidal soil.<br>(2) The effective phosphorus content of soil of different land use types. The effective phosphorus content of soil of different land types varied significantly. Among them, the vegetable land content is the highest, with an average of 69.35mg/kg, with a variation of 3.0 to 271.4mg/kg, followed by an orchard with an average of 41.24mg/kg, with a change of 3.0 to 140.9mg/kg, and the lowest grain field content, with an average content of 36.28mg/kg, with an imbalanced content of 2.4 to 335.1mg/kg

The content of available phosphorus in each subspecies of fluvo aquic soil varied greatly. The content of available phosphorus in fluvo aquic soil was the highest, with an average of 40.61 mg / kg, while that of saline soil was the lowest, with an average of 27.38 mg / kg. The content of available forest in fluvo aquic soil was higher than that in saline soil.<br>(2) The content of soil available phosphorus in different land use types. The content of available phosphorus in different land use types was significantly different. Among them, vegetable field content was the highest, with an average of 69.35mg/kg, with a range of 3.0-271.4mg/kg; the second was orchard, with an average of 41.24mg/kg, with a range of 3.0-140.9mg/kg; the grain field content was the lowest, with an average content of 36.28mg/kg, with a range of 2.4-335.1mg/kg<br>