Nitrogen and calcium fertilization on the growth and development of gerbera cultivated in pots for cut flowers

Adubação com nitrogênio e cálcio no crescimento e desenvolvimento de gérbera de corte cultivada em recipientes

ABSTRACT

Gerbera is a flowering species with relevance to the cut flower market. Understanding nutritional requirements of the species is important to improve fertilization procedures. In the present work, our objective was to evaluate the influence of different doses of nitrogen (N) and calcium (Ca) on the growth and development of gerbera cultivated in pots as a cut flower. The experiment was conducted in a protected environment in a bifactorial design, with an additional treatment consisting of the combination of three N (0.07, 0.15 and 0.2 g L^-1 substrate) and Ca (0.02, 0.03 and 0.04 g L^-1 substrate) doses applied every 15 days. Control plants were not supplemented with either N or Ca. No significant interaction between N and Ca doses was observed. The highest number of flower stalks was obtained with 0.15 g N L^-1 substrate and 0.04 g Ca L^-1 substrate. Flower diameter, plant leaf area and total chlorophyll contents were at a maximum of 0.14 g N L^-1 substrate and 0.04 g Ca L^-1 substrate. N and Ca doses influenced in an independent manner the growth and development of gerberas as a cut flower cultivated in pots, and we determined that its fertilization should occur every 15 days with 0.34 g N L^-1 substrate and 0.04 g Ca L^-1 substrate.

Keywords:
Gerbera hybrida Hort.; floriculture; plant nutrition; mineral nutrition; substrate