ISSN 2375-1185
African Journal of Agronomy ISSN 2375-1177 Vol. 6 (3), pp. 362-369, March, 2018. © International Scholars Journals
Full Length Research Paper
A study of dairy sewage sludge as the source of soil quality improvement or its degradation
*Jurgiel Artur1, Zuba Opiola2 and Marek Goss2
1Department of Food Technology, Agricultural University of Kraków, Kraków, Poland.
2Department of Biotechnology, Agricultural University of Kraków, Kraków, Poland.
*Corresponding author. E-mail: [email protected]
Accepted 12 April, 2017
Abstract
Biochemical indices related with the transformations of C, N and P are frequently used in the diagnosis of soil quality. Such an assessment usually includes analysis of the following enzymes – the activity of dehydrogenases and of hydrolytic enzymes such as phosphatases, urease and protease. The objective of the study presented here was evaluation of dairy sewage sludge as an agent causing an improvement of soil quality or its degradation. Estimation of soil quality was performed on the basis of a comprehensive study comprising analyses of microbiological and biochemical parameters. The results of the study indicate a stimulating effect of dairy sewage sludge on the soil microorganisms, which was apparent also as an increase in the activity of the enzymes studied. That effect should be attributed to soil enrichment in organic matter, total nitrogen and minerals.
Key words: Dairy sewage sludge, enzymatic activity, microorganisms, soil.