Organic nitrogen cycle, ammonification and nitrification activity in long-term field experiment
1999
Kubat, J. | Novakova, J. | Cerhanova, D. | Apfelthaler, R. (Vyzkumny Ustav Rostlinne Vyroby, Prague-Ruzyne (Czech Republic))
The results have shown that nitrogen cannot be accumulated in soil for a longer time period except in the soil organic matter. The increase of the C/N ratio in control and mineral fertilised variants indicates the fact that nitrogenous components of the soil organic matter are more vulnerable to decomposition than those non containing nitrogen in its molecule. Organic manuring increased the average number of proteolytic bacteria, while mineral fertilisation decreased their number to about a half of that in control. Average number of the free living N2-fixing bacteria was lower in tilled variants as compared to non-tilled control and it decreased continuously over the whole time of the experiment.
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