Export of nutrient by some rose cultivars in Tenerife

Abstract

The nutrient export by flowering stems in 3 year-old rose bushes was determined for three varieties of great commercial importance in Tenerife. The cultivar VISA exports annually per m$ 20.16 grs N. 6.55 grs P$O$ and 23.45 grs K$O, white ILONA exports 13.57 grs N, 4,08 grs P$O$ and 17,11 grs K$O$ and MERCEDES 25,60 grs N, 5.04 grs P$O$ and 19,57 grs K$O$. The nutrient amounts extracted from the greenhouse in pruning and pinching out operations are included in these figures.