摘要
四川紫色水稻土胶体比表面主要取决于2:1型膨胀性粘土矿物的含量.有机质对中性紫色水稻土和石灰性紫色水稻土胶体的比表面有一定贡献,对酸性紫色水稻土胶体比表面有所消耗。氧化铁对中性和石灰性紫色水稻土胶体比表面有所掩盖,对酸性紫色水稻土胶体比表面有贡献.二价阳离子对比表面的贡献大于一价阳离子。羟基释放量与比表面有一定相关性。
The specific surface area(SSA)of three paddy soil colloids in Sichuan was shown to have agreater variation range,which depends mainly on the content of 2:1 expanding minerals.The influ-ence of organic matter and free lron oxides on SSA appeared closely related to their characters and themanner of their combining with clay.The divalent cations made greater contribution to ssA fhan themonovalent cations.Some association was observed betwween the amount of the hydroxy released andSSA,suggesting the feasibility of using hydroxy release in describing SSA of the soil.
出处
《西南农业大学学报（自然科学版）》
CSCD
1991年第3期296-301,共6页
Journal of Southwest Agricultural University
基金
国家教委博士点专项基金
关键词
紫色水稻土
土壤胶体
比表面
四川省
purple paddy soil
soil colloid
specific surface
Sichuan province
