The content and quality of soil organic matter in key monitoring sites observing by soil monitoring system of the Slovak Republic
2003
Zaujec, A. (Slovak Agricultural Univ., Nitra (Slovak Republic)) | Kobza, J.
In soil samples taken from twenty-one key monitoring sites of the Slovak Republic representing grassland and arable soils, the quality of soil organic matter was studied. Average content of total organic matter was in wide range from 1.6 to 34.7%. The level of humification varied from 49.8 to 16.7% in monitoring soils and decreased by increasing content of total organic carbon. The higher average quality of soil organic matter in arable soils (0.98) against grassland soils (0.63), expressed by HA:FA ratio, was statistically significant confirmed by lower values colour quotients. Enormous difference has been determined in values of labile carbon and ratio C L: N pot (range from 6.4 to 72.1). The content of labile carbon in grassland soils was five-times higher than in arable soils, what is result of high content of total organic carbon and low degree of humification. Lability parameter (L), has been calculated as ratio labile and non-labile carbon content, scant results for evaluation differences of soil organic matter in analysed soils. For assessment of soil organic matter quality can be used ratio C L:N pot , when lower values corresponding to higher quality of soil organic matter
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