CONTENT OF POTASSIUM IN DIFFERENT FORMS IN THE SOILS OF SOUTHEAST POLAND

摘要

This paper discusses the results of soil surveys of the content of different forms of potassium (K) carried out in 2003/2004 in Southeast Poland. A total of 700 soil samples, representing all soil textural groups, were collected from the plough layerand the subsoil, with the content of 'total', reserve, exchangeable, 'available' and water soluble potassium being determined. The content of all forms of non-water soluble potassium depends on soil texture, soil pH and the soil layer. The average sharesof reserve, exchangeable and water soluble potassium in the 'total' potassium were 35.8,11.8 and 2.76 % respectively, increasing from light to heavy soils and being higher in the plough layer than in the subsoil. The content of 'available' potassium determined in Poland using the Egner-Riehm DL method closely correlates with the content of exchangeable potassium.