黄土母质褐土中钾的含量与土壤粒级的关系研究——以许昌褐土为例

The Relation Between Potassium Contents and Particles of the Loess-Derived Cinnamon Soil --Taking Xuchang Cinnamon Soil for Example

土壤化学组成与土壤的颗粒组成有着密切的关系 本文研究的目的是以河南许昌黄土母质褐土为例确定黄土母质中钾的含量与土壤各级颗粒组成的关系 土壤样品取于许昌黄土母质褐土的 7个土种 根据测定的土壤各个粒级以及土壤全钾和速效性钾的含量数据 ,利用数理统计的方法进行分析 结果发现 ,土壤速效性钾的含量与粒径在 0 0 0 5～ 0 .0 0 1毫米的土壤颗粒含量密切相关 ,土壤全钾的含量与小于 0 0 0 1毫米的土壤粘粒含量密切相关

The chemical composition of soil is closely related to soil particle content.The objective of this investigation was to examine the relationship of potassium nutrent′s types and content with texture of loess derived cinnamon soil in Xuchang,northern China.The samples were collected form seven species of loess derived cinnamon soil,whose texture and potassium contents were measured with chemical and physical mehods in lab.Using statistics,the data of soil about texture and potassium contents were analysed.Close correlations between rapidly available potassium content with 0.005-0.001 mm soil particles content and between whole potassium and <0.001 mm soil particles were obtained.The data provides evidence that in loess derived soils,the silt fraction,presumably resulting from its high mica concentration,is of great importance for the supply of K + to plants.Regression equations about texture and potassium were created with stepwise regression method.