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”。
The distribution and relationship of Olsen-P, CaCl2-P, NaOH-P were studied in the profile of 0- 100 cm vegetable fields. The results showed that the content of Olsen-P, CaCl2-P, NaOH-P was 123.8 - 399.6 mg/kg, 9.1 - 27.2 mg/kg and 184.9 - 608.9 mg/kg respectively in the profile of 0 - 20 cm layer. The most of phosphorus in the soils was accumulated in the profile of 0 - 20 cm layer and the content of Olsen-P, CaCl2-P, 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 CaCl2-P was increased significantly when the content of Olsen-P was more than 55.6 - 63.0 mg/kg. The content of Olsen-P was the ＂Change Point＂ of indicating the risk of phosphorus leaching.
出处
《华北农学报》
CSCD
北大核心
2006年第4期67-70,共4页
Acta Agriculturae Boreali-Sinica
基金
河北省自然科学基金(300130)
关键词
菜地土壤
磷素淋失
影响因素
Vegetable fields
Phosphorus leaching
Impact factors
