Bladgødskning af sukkerroer med kvælstof

Conclusion

In both years similar sugar yields were obtained when 25% of the nitrogen was applied with leaf fertiliser. There was no significant effect of nitrogen fertilisers in 2024, and more trials are needed to generally conclude about N-effects using leaf applications.

In both years one additional variant of leaf applications was tested. In both cases, yield loss was observed compared to a strategy with 60 kg N per ha placed + 2 x 10 kg N per ha via leaf applications.

An additional trial in 2024 indicates that leaf applications must be initiated earlier (May-June) than in the above-mentioned trials (June-July).

In the trial in 2024, also emissions of nitrous oxide were measured. However, conclusions on this topic will not be made until further trials have been performed in 2025.