Abstract
Proper growth and development of broccoli may be affected by the application of N and B. Accordingly, the objective herein was to verify the effects of N and B application on growth and the nutritional status in the vegetative phase of broccoli. The experimental design was a completely random one in a factorial (4 × 2 +1) scheme, with four doses of B (0.25, 0.50, 1.00, and 2.00 mg dm-3) and two doses of N (200 and 600 mg dm-3), and the check treatment (no B and no N), with four repetitions. The green color index, the accumulation of N and B in the plant aerial part, leaf area, and the aerial part dry matter content were evaluated. The interaction between nitrogen and boron was not important for the green color index, N and B accumulation, leaf area and dry matter production of broccoli in the vegetative phase. However, the isolated effects of nitrogen fertilization and boron doses were beneficial for broccoli development. Key words: Fertilization, Brassica oleraceae var. italic, vegetative phase.
Highlights
INTRODUCTIONBroccoli (Brassica oleracea var. italica) is one of the vegetable species most widely grown and consumed in the world (Pizetta et al, 2005), highlighted mainly for its nutritional value as a source of various compounds, such as vitamins, minerals, antioxidants (Umar et al, 2013a), as well as its anticancer properties (Yoldas et al, 2008)
Broccoli (Brassica oleracea var. italica) is one of the vegetable species most widely grown and consumed in the world (Pizetta et al, 2005), highlighted mainly for its nutritional value as a source of various compounds, such as vitamins, minerals, antioxidants (Umar et al, 2013a), as well as its anticancer properties (Yoldas et al, 2008).Among the cultural practices capable of increasing the productivity and the quality of broccolis, the equilibrated application of nutrients, especially N and B (Kojoi et al, 2009), is one of the most important
The isolated effects of nitrogen fertilization and boron doses were beneficial for broccoli development
Summary
Broccoli (Brassica oleracea var. italica) is one of the vegetable species most widely grown and consumed in the world (Pizetta et al, 2005), highlighted mainly for its nutritional value as a source of various compounds, such as vitamins, minerals, antioxidants (Umar et al, 2013a), as well as its anticancer properties (Yoldas et al, 2008). The hypothesis that the plants submitted to the N in excess could reduce the amount of accumulated B without hampering dry matter production since the low demand of that micronutrient during the vegetative phase, and the interaction between N and B is lowly probable as long as B is not deficient. Having those facts in mind, the objective of this research work was to verify the effects of the application of N and B on the growth and nutritional status of broccoli plants during the vegetative phase of growth
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