Wpływ nawożenia azotowego
na tempo wzrostu roślin i plonowanie
kalafiora białego, zielonego oraz romanesco^*

Abstract. The effect of different rate of nitrogen fertilization on the course of growing stages and yielding of white, green, and romanesco cauliflower was examined. The size of nitrogen rates had no significant influence on the length of successive growing stages of plants as well as on the yielding level. However the differences among compared cultivars of cauliflower (white ‘Planita F₁’, green ‘Trevi F₁’, and romanesco ‘Amfora F₁’) were observed.

The effect of nitrogen fertilization on the course of growth
and yielding of white, green and romanesco cauliflower

Summary

The effect of different rates of nitrogen fertilization (150, 200 and 250 kg N·ha^-1) on the course of growing stages and yield of white, green, and romanesco cauliflower was examined. The diverse of the nitrogen fertilization had no significant influence on the length of successive growing stages of the investigated cauliflower types. However, differences among them were observed, showing that green cauliflower ‘Trevi F₁’ had the longest period of development, shorter white type cv. ‘Planita F₁’, and the shortest romanesco type cv. ‘Amfora F₁’. The size of nitrogen rates had no significant influence on the total and commercial curd yields of all the investigated cauliflower types. The green cauliflower produced the yield at a similar level as the white one, however, romanesco cauliflower at a considerably lower level.