标题：THE EFFECT OF FERTILISATION OF SEWAGE SLUDGE ON SOIL ACTIVITY IN THE YEAR OF APPLICATION AND IN SUCCESSIVE YEARS FOLLOWING ITS INTRODUCTION IN MAIZE GROWN FOR GRAIN
摘要：The aim of this study was to investigate the effect of fertilisation of sewage sludge coming from a municipal sewage treatment plant on selected physical parameters of soil as well as its biochemical and microbiological activity in the year of sewage sludge application and in the two successive years following its introduction in maize grown for grain. Recorded results concerning the effect of the used sewage sludge on physical properties of soil such as soil cohesion and CO2 emission indicate its positive, statistically significant effect in growing of maize both in the year of its application and in the successive years. Results of studies showed that fertilisation of lessive soil using sewage sludge caused changes in its enzymatic activity. Intensity and direction of the occurring changes were dependent on the development phase of the crop and the time from the introduction of sewage sludge to soil. Application of sewage sludge as fertiliser and successive plant development phases were reflected in changes in the counts of analyzed groups of soil microorganisms. As a result of sewage sludge introduction an increase was recorded in the numbers of microorganisms being pioneers in the degradation of organic matter, i.e. fungi, actinobacteria and proteolytic bacteria, while total counts of bacteria decreased.
