摘要： 以菜地为供试土壤，研究了0~100cM菜地土壤Olsen-P、CaCl₂-P、NaOH-P的空间分布状况及其相关关系。结果表明，0~20cM菜地Olsen-P、CaCl₂-P、NaOH-P含量分别为：123.8~399.6mg/kg、9.1~27.2mg/kg、184.9~608.9mg/kg。土壤Olsen-P、CaCl₂-P、NaOH-P主要积累在0~20cM土层，随着土壤深度的增加土壤磷的积累量逐渐降低；土壤Olsen-P与CaCl₂-P、NaOH-P呈显著正相关关系。土壤Olsen-P含量高于55.6~63.0mg/kg时，土壤CaCl₂-P显著增加，此时的Olsen-P含量为土壤磷渗漏淋失显著增加的“突变点”。

关键词: 菜地土壤, 磷素淋失, 影响因素

Abstract: The distribution and relationship of Olsen-P,CaCl₂-P,NaOH-P were studied in the profile of 0-100cM vegetable fields.The results showed that the content of Olsen-P,CaCl₂-P,NaOH-P was 123.8-399.6mg/kg,9.1-27.2mg/kg and 184.9-608.9mg/kg respectively in the profile of 0-20cM layer.The most of phosphorus in the soils was accumulated in the profile of 0-20cM layer and the content of Olsen-P,CaCl₂P,NaOH-P was decreased graduaily with the depth of soils.There was significant positive correlation between Olsen-P,CaCl₂-P and NaOH-P.The content of CaCl₂P was increased significantly when the content of Olsen-P was more than 55.6~63.0mg/kg.The content of Olsen-P was the "Change Point" of indicating the risk of phosphorus leaching.

Key words: Vegetable fields, Phosphorus leaching, Impact factors

中图分类号: 

• S153