塿土非代换性钾剖面分布模型与系统分类探讨  

Inquire into the Profile Distribution Model and Toxonomic Classification of Nonexchangeable Potassium of the Tier Soil

作　　者：贾恒义[1] 雍绍萍[1] 田积莹[1] 

机构地区：[1]中国科学院,水利部西北水土保持研究所

出　　处：《水土保持通报》1994年第3期52-58,共7页Bulletin of Soil and Water Conservation

摘　　要：　土非代换性钾在剖面分析特征，拟合是一个非线性方程，并以此可对　土进行初步的系统分类，初拟对５个剖面可分为三个类型。图中Ａ部位反映了　土肥熟堆垫表层（或者　化过程）中土壤非代换性钾的变化状态，表现为耕作层（现代）高，以下土层则逐渐降低，这和肥熟堆垫过程，栽培作物的吸收，迁移和富集等土壤生态环境有关．也表明了在植物参与下　土剖面的非代换性钾耗竭、富集与成壤过程的同步性和异空间性。The profile distribution of the tier soil nonexchangeable potassium was characterized by following nonlinear equation: Premilinarily toxonomic classification was carried out by use of the equation on which five profiles of tier soil was divided into three types.The part labled A in figure reflected changes of nonexchangeable potassium in the fimic cumulic epipeden or tieric process of the tier soil. The content of nonexchangeable potassium is high in cultivated horizon and lower with the increase of deepth in the soil profile,which is related to the fimic cumulic process,plant uptake,potassium migration and eutrophlcation,and the other eco-environment factors.The results also indicated the synchronism and other space property between the exhaustion, accumulation of nonexchangeable pofassium and soil formation process with the participation of plants.

关 键 词：土壤 LOU土 非代换性钾 分布 钾 

分 类 号：S153.61[农业科学—土壤学]