胶体磷在3种类型土壤中的迁移阻滞

何霜,李发永,刘子闻,王志荣,吴珊珊,张天昱,曹玉成,梁新强

Retarding effect of migration of colloidal phosphorus in three types of soil

Shuang HE,Fayong LI,Ziwen LIU,Zhirong WANG,Shanshan WU,Tianyu Zhang,Yucheng Cao,Xingqiang Liang

表1 供试土壤的基本理化性质

Table 1 Basic physical and chemical properties of soil samples

指标 Index	水稻土 Paddy soil	茶园土 Tea soil	菜地土 Vegetable soil
w（黏粒） Clay content/%	24.5	21.6	19.1
w（粉粒） Silt content/%	40.7	39.1	31.7
w（砂粒） Sand content/%	34.8	39.3	49.2
pH	6.63	5.19	5.92
w（总磷） Total P content/(g/kg)	0.36±0.01	0.60±0.03	0.70±0.08
w（胶体磷） Colloidal P content/(mg/kg)	2.43±0.22	10.01±1.21	12.30±2.36