Investigations of nutrients availability from organic fertilizers in model soil systems

Abstract

The aim of this study is to determine the processes of migration and transformation of nutritional in model systems of untouched soils using different amount of organic fertilizers. Investigations shows that the greatest amount of nitrates, nitrites and phosphates was found in the first layer of the soil in 60 days' time after application of organic fertilizers. Later concentration in this layer decreases as it increases in the second and the third layers of the soil. However, even in 150 days' time after application of organic fertilizers, concentration of nitrates, nitrites and phosphates in the forth and the fifth layers of the soil increases insignificantly. Concentration of ammonium ions was found the greatest in 10 days' time after application of organic fertilizers. It was found especially great in the first layer of the soil (11.69 mg l(-1)) and after 60 and 150 days' time after application of organic fertilizers concentration of ammonium ions decreases. Migration of nitrogen compounds in soil is slow, takes places at a speed of 0.2 cm/ day. Correlation between soil parameters was established. Dynamics of nutrients in the model soil systems shows availability of nutrients for plants after different time of application of organic fertilizers.