Transformation of nitrogen fertilizers in greenhouse experiments
2002
Notas, E. | Debreczeni, K. | Fischl, K. | Heltai, G.
The primary (1st year) and the after-effects (2nd, 3rd year) of N fertilizers (KNO3, NH4Cl) on the soil-plant-atmosphere system were studied in a three-year greenhouse pot experiment with and without maize plants. The two- and three-year balances of the fertilizer N uptake and gaseous N losses were also analyzed. The cumulative values of the gaseous losses showed a similar trend in all years, significant differences were not obtained. On the basis of the three-year balance, the gaseous loss in the planted and unplanted pots was 18-22% and about 37-39%, respectively. Consequently, there was a 50% decrease in denitrificated gaseous losses of fertilizer N due to plant N uptake.
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