EFFECTS OF NITROGEN AVAILABILITY ON CROP GROWTH AND NITROGEN UPTAKE OF BRUSSELS SPROUTS AND LEEK

Dry matter production, nitrogen uptake and changes in soil mineral nitrogen during crop growth of leek and Brussels sprouts were studied in a field trial, at different levels of nitrogen fertilizer.
Dry matter production of Brussels sprouts increased with increasing nitrogen availability and maximum dry matter production was reached at 200 kg N ha^-1. Nitrogen uptake increased linearly with nitrogen rates up to 300 kg N ha^-1. Apparent nitrogen recovery was over 90 % and was independent of the amount of nitrogen applied.
Total dry matter production of leek was lower and maximum dry matter production was reached at 125 kg N ha^-1, apparent nitrogen recovery was 90 % at this rate, but at a rate of 250 kg N ha^-1 the apparent nitrogen recovery was 51%.

Workshop on Ecological Aspects of Vegetable Fertilization in Integrated Crop Production in the Field

R. Booij, C.T. Enserink, A.L. Smit, A. van der Werf

Allium porrum L., Brassica oleracea L. var. gemmifera, nitrogen balance, Nmin, N-uptake, relative growth-rate, soil mineral nitrogen

https://doi.org/10.17660/ActaHortic.1993.339.5