Ivanka G. Mitova and Nikolai S. Dinev
N. Poushkarov Institute of Soil Science, Agrotechnologies and Plant Protection,1080 Sofia, Bulgaria
Mitova, I. G. & Dinev, N. S. (2021). Growth indicators and structure of headed cabbage production depending on the fertilization applied. Bulg. J. Agric. Sci., 27 (1), 161–166
A long-standing vegetation field experiment in crop rotation has been conducted with the aim to establish effect of applied foliar and mineral fertilization on the vegetative indicators and the yield of head cabbage (Brassica oleraceae L. var. capitata). The experiment was performed with the following variants: Variant 1 – non-treated control; Variant 2 – without soil fertilization and two foliar feeds; Variant 3 – N24P12K12; Variant 4 – N12P6K6 and one foliar treatment. The applied foliar fertilizer was Tekamin Max – a neutral organic fertilizer that contains 14.4% amino acids, 60% organic matter and 7% total nitrogen. The plants fertilized with N24P12K12 show the best vegetative development, the maximum weight of the cabbage and highest yield. The double-leaf-treated green plants show better results in the number of rosette leaves formed. The yield improvement compared to the non-fertilizer control was 3.3 times for the variant N24P12K12, 2.6 times for the two leaf fertilized plants and 1.96 times for the variant N12P6K6 + one foliar treatment. The results show the need to create good root nutrition conditions regardless of foliar treatment.