Organic carbon cycle, incidence of microorganisms and respiration activity in long-term field experiment
1999
Kubat, J. | Novakova, J. | Mikanova, O. | Apfelthaler, R. (Vyzkumny Ustav Rostlinne Vyroby, Prague-Ruzyne (Czech Republic))
In order to determine long-term effects of organic and mineral fertilisers on soil organic matter, soil microorganisms and their activity and further soil properties was established. High doses of organic manure increased the soil organic carbon content. The carbon accumulation in these plots proceeded for about 13 years. During this time period, the effect of organic manure on the carbon content in soil was approximately additional. Accumulated organic matter decomposition occurred later on, when no further manuring was applied. Slight decrease of the carbon concentration occurred in control and mineral fertilised variants over the whole time. Organic manuring increased basal respiration rate, mainly in the stationary time period. Organic manuring increased the average number of bacteria about twice, as compared to unfertilised controls, while mineral fertilisation decreased their number to about a half of that in controls.
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