NITROGEN FERTILISATION OF PHASEOLUS VULGARIS (BROWN BEANS)
Three cultivars of dried brown beans were grown in the 1997 season. The soil analysis in the spring showed a content of 10 kg N ha-1 previously mineralized nitrogen. In a low fertilised treatment 5 kg N/ha was added and in a normal fertilised treatment 30 kg N/ha. No differences were found between the treatments for any of the cultivars with respect to yield, number of nitrogen-fixing nodules, or plant of dry matter and nitrogen contents. All experimental plots contained about 9 kg N ha-1 in the autumn.
This experiment indicates that an Nmin content of 15 kg N ha-1 might be enough in the spring. If this figure can be confirmed in future experiments it should be possible to omit nitrogen fertilisation on some fields, or during years with abundant early nitrogen mineralization, without risking a reduced yield.
DOI: 10.17660/ActaHortic.1999.506.13
https://doi.org/10.17660/ActaHortic.1999.506.13