我国南方一些土壤的钾素状况及其含钾矿物  

POTASSIUM STATUS AND CONTENTS OF K-BEARING MINERALS OF SOME SOILS IN SOUTHERN CHINA

作　　者：朱永官[1] 罗家贤[1] 

机构地区：[1]中国科学院南京土壤研究所

出　　处：《土壤学报》1994年第4期430-438,共9页Acta Pedologica Sinica

摘　　要：本文研究了我国南方一些土壤的钾素状况及其含钾矿物。结果表明，土壤含钾矿物的含量和种类因成土母质和土壤发育程度而异。花岗岩发育土壤的含钾矿物随粒径增大而增加（＞５０μ除外），沉积岩发育的土壤情况相反。土壤的非交换性钾与云母类矿物含量呈较好的相关性（ｒ＝０．６６９￣＊），交换性钾与土壤ＣＥＣ呈极显著正相关（ｒ＝０．８０８）。不同粒级对土壤全钾量贡献不一，花岗岩发育土壤的全钾量主要集中于１０—５０μ和＞５０μ粒级中，沉积岩发育土壤的全钾量主要集中于＜２μ和２－１０μ粒级中。This paper deals with the potassium status and K-bearing minerals in the soilsin South of China. Results show that the contents and types of soil K-bearing mi-nerals were influenced by parent materials and soil development, the K-bearing mi-nerals in the soils developed from granite increased with the particle size (with theexception of>50μ fractions),but a contrary result was found for the soil derivedfrom sediment rock.Soil nonexchangeable was well correlated with the contents ofmicaceous minerals(r=0.669￣*),and exchangeable K was significantly correlatedwith soiI CEC(r=0.808).Different particle size fractions made different contri-bution to the total potassium in the soil.Total potassium was mainly concentratedin the fractions of 10-50μand>50μfor the soils derived from granite,and inthe fractions of<2μand 2-10μfor those derived from sediment rock.

关 键 词：含钾矿物 钾素状况 供钾能力 风化 土壤 

分 类 号：S158.3[农业科学—土壤学] S153.6[农业科学—农业基础科学]