北京郊区几种典型土壤对硼的吸附性能

采用室内模拟法，研究了石灰性土壤中硼的吸附及其与土壤各化性质的关系，对北京郊区不同海拔高度５种土壤吸附硼的几种影响因素研究结果表明，和种土壤对硼的吸附符合Ｆｒｅｕｎｄｌｉｃｈ等温吸附方程，其吸附量随土壤ＰＨ值的增加而升高，

Adsorbing Boron Properties of Five Typical Soils from Suburban in Beijing

With simulation experiment in laboratory,the study was made on the relationship between the adsorption of boron onto lime soils and the physical and chemical properties of soils.Five types of soils were collected from the suburban areas of Beijing at differentheights above sea level,and were used to examine the factors that affect the adsorption of boron(B) onto soils.The results show that the adsorption of boron onto all the soils studied follows the Freundlich isothem adsorption equation and the amount of boron adsorbed increases with pH value of soil increasing,while the maximum reaches at pH10.0.At the same time,the boron adsorption was found to be positively correlative to the primary soil properties,such as contents of organic matter,CaCO₃,and clay particles with a size of <0.002mm in soils.Among the soils,brown earth and paddy soil have a lower boron adsorption.