摘要
研究了湖北省棕红壤、黄棕壤、水稻土和灰潮土的粘土矿物组成、电荷性质及对磷的吸附。结果表明:①供试土壤的粘土矿物组成都以水云母为主,高岭石和1.4nm矿物含量较少,1.4nm矿物种类不同且比例变异大;②供试土壤的负电荷量(CEC8.2)介于9.2~19.1cmol/kg间,永久负电荷占CEC8.2的50%~64%,阴离子交换量(AEC)为0.75~2.21cmol/kg,电荷零点(PZC)介于2.3~3.4;③供试土壤对磷的吸附量多符合Langmuir方程,其高低顺序为棕红壤>黄棕壤>水稻土>灰潮土。
Seven soils of Hubei Province were used to investigate the clay mineral constituents, charge properties and atsorption behaviors of phosphate. The results show that: (1) Hydromica in the clay fraction was predominant in these soils tested, and the content of kaolinite and 1.4 nm mineral was very low. (2) The amount of negative charge (CEC 8.2 ) for them was changed from 9.2 cmol/kg to 19.1 cmol/kg, and the anion exchange capacity (AEC) for them was 0.75~2.21 cmol/kg. All samples contained variable negative charge (CECv), even the rate of CECv to CEC 8.2 was less than 50%. (3) The amount of phosphate absorbed for varied different soils, which was corresponding to the clay mineral constituents and surface properties of the soils.
出处
《华中农业大学学报》
CAS
CSCD
北大核心
1998年第4期335-340,共6页
Journal of Huazhong Agricultural University
基金
湖北省自然科学基金
国家教委留学回国基金
关键词
湖北
土壤
粘土矿物
表面化学性质
clay minerals
surface properties
soils in Hubei Province