摘要
以化学浸提的方法研究了亚热带红壤丘陵区茶园土壤中活性Al和F的溶出和剖面分布特征．结果表明，各浸提液对Al的浸提能力顺序为：1mol／L HCl〉1mol／L NH4AC（pH4．8）〉1mol／L KCl（pH5．5）〉H2O（pH6．8）．同样，在4种浸提态F中，1mol／LHCl所提取F的含量最高，含量范围为6．62～38．8mg／kg，1mol／L KCI与1mol／LH4AC所提取F含量次之，分别为4．57～28．1mg／kg和5．76～32．17mg／kg，水溶性F的含量最低，含量范围为0．95～4．18mg／kg．各浸提态Al和F主要集中于0～3cm的表层，土壤剖面分布有上高下低的特征．水溶性Al与F存在线性回归关系，其他各浸提态Al和相关浸提态F之间也为显著的正相关关系．土壤中各浸提态Al和F含量随植茶年限的增长而增加，同时也受土壤母质、土壤pH值和有机质影响．
The distribution of Al and F extracted by four extracting solutions in red soils of tea plantation from subtropical hilly country was studied. It was indicated that the order for aluminum-extracting capacity of the four extractants was as follows： 1 mol/L HCl〉 1 mol/L NH4AC （pH4.8） 〉 1 mol/L KCl （pH5.5） 〉 H2O （pH6.8）. The fluoride content extracted by 1 mol/L HCI was the highest, ranging from 6.62-38.8 mg/kg; the fluoride content extracted by 1 mol/L KCl and 1 mol/L NH4AC was the next, ranging from 4.57 - 28.1 mg/kg and 5.76 - 32.17 mg/kg, respectively; and the water-soluble fluoride content was the lowest, ranging from 6.62- 38.8 mg/kg. The contents of aluminum and fluoride extracted by four extractants decreased with depth along soil profiles and accumulate 0-3 cm surface soils. The linear regression between fluoride and aluminum extracted by deionised water was established. Aluminum was significantly correlated with fluoride extracted by the other extractants. Marked increase of the content of aluminum and fluoride was noticed with increase ages of tea plantation. Parent material and organic matter also influenced the content of aluminum and fluoride extracted by four extractants.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2006年第3期544-549,共6页
Environmental Science
基金
国家重点基础研究发展规划(973)项目(G1999011809)
杭州电子科技大学科研基金项目(kys011504005)
关键词
AL
F
化学浸提
茶园土壤
aluminum
fluoride
chemical extraction
tea plantation soil
