EFFECTS OF DIFFERENT FORMS OF LIME AMELIORANTS ON AGROCHEMICAL PROPERTIES OF SOD-PODZOLIC LIGHT LOAMY SLIGHTLY ACID SOIL

Abstract

Cultivation of crops on sod-podzolic light loamy soil of slightly acidic (pH 5.6) through the four years leads to an increase in its acidity to acidic (pH less than 5.5). Making ameliorants such as chalk and calcareous sapropel containing in its structure easily accessible form of calcium, the second year after liming of sod-podzolic light loamy slightly acid soil leads to a significant reduction in soil acidity, but the effect of their action for the third year fades faster than on the background of dolomite flour. Dolomite flour has a lasting effect over time. Liming of soil by different types of ameliorants in varying degrees increases the content of the soil exchange forms of calcium and magnesium affecting the ratio of these elements. On average, the second to fourth years after liming the ratio between CaO and MgO in the soil in the application of dolomite flour was 4,1, 6,7 - carbonate sapropel, chalk - 8,5, the initial value up to 4,8 favorite experience at the optimum ratio of 4-6. When making chalk as lime ameliorant on sod-podzolic light loamy soils with high content of exchangeable magnesium (300 mg/kg) can avoid the sharp disparity between CaO and MgO in the soil.