Влияние кислотности на содержание кальция и магния в почвах Беларуси

Abstract

The aim of study was the evaluation of influence of soil acidity level on the content of exchangeable calcium and magnesium. On the base of a number of field experiments with various lime rates was considered that the content of calcium and magnesium is sufficient to plant nutrition. The content of exchangeable magnesium considerably increase with pH growing up to 2,5 cmol(+)/kg on sand-loamy soil and 3,5 cmol(+)/kg loamy soil. The content of exchangeable calcium with pH above 5,0 increase d very slowly and is limited 5 cmol(+)/kg on sand-loamy soil and 6 cmol(+)/kg on loamy soil. The index of sum of exchangeable cations of Cappen-Gilkovic is unsatisfactory for characteristic of providing absorption complex of calcium and magnesium, it is recommended to use their content in a neutrally saline extract.