Comparison of chemical and biological properties of Haplic Chernozems and Haplic Luvisols in soil profile
2004
Javorekova, S.,Slovak Univ. of Agriculture in Nitra (Slovak Republic). Tr. A. Hlinku 2, 949 76 Nitra, Slovak Republic | Vjatrakova, J. | Labudova, S. | Labuda, R. | Chlpik, J.
Selected chemical and biological parameters of Haplic Chernozems and Haplic Luvisols from south-western Slovakia were determined. The samples were taken to a depth up to 0.9-1.0 m of the soil profile in spring 2000. The value of the investigated chemical and biological parameters were lower in Haplic Luvisols than in Haplic Chernozems. Results of basal and potential respiration activity, however, suggest that a very good microbial mineralization ability related to nutrient release can be also assumed in Haplic Luvisols, mainly in the arable layer. Determined chemical parameters were in accordance with the biological ones. Numbers of cultivable micro-organisms and the weight of microbial biomass were decreasing in both soil types downwards in soil profile. A close to very close linear relation between the above mentioned parameters and the following soil characteristics was found in Haplic Chernozems: total organic carbon content, total nitrogen content, water-soluble carbon content, activity of dehydrogenase, FDA hydrolysis and intensity of nitrification. Bacteria and their spores utilizing inorganic nitrogen represented the most numerous group in Haplic Chernozems (62% of the total number of cultivable micro-organisms). In Haplic Luvisols, bacteria and their spores which utilized organic nitrogen predominated (69% of the total number). The Haplic Chernozems was richer in amylolytic bacteria, actinomycetes and anaerobic bacteria. In the Haplic Luvisols, more bacteria utilizing organic nitrogen, myxobacteria and microscopic fungi were present. In both soil subtypes the most frequently occurring representant of microscopic fungi was the genus of Penicillium.
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