Abstract
ABSTRACT Chrysanthemum is one of the most widely marketed cut flower in the world. For this flower cultivation, long days to induce vegetative growth are required, until the plant reaches the necessary size for commercial flowering. The aim of this study was to evaluate the influence of the number of long days on the production of floral stems of five cut chrysanthemum cultivars. The experiment was evaluated in a randomized block design with split plots, with two factors and three replicates. Considering the number of long days (21, 28, 35, 42 and 49) the plots, and sub-plots the cut chrysanthemum cultivars (Calábria, Dragon, Sheena, Apricot Repin and Rebasco). We noticed significant differences for most of morphological traits for number of long days, and for interaction of cultivar x number of long days. Dragon, Apricot Repin and Calábria were the cultivars which stood out producing greater vigor of stems and better agronomic quality. Sheena and Rebasco cultivars showed the lowest performance among the evaluated cultivars, though. The cut chrysanthemum cultivars showed agronomic performance which allows a reduction in the number of long days of exposure, from 35-45 days usually practiced, to 21-28 days, reducing the time required for commercialization.
Highlights
O crisântemo é uma das espécies mais comercializadas como flor de corte
Sendo os números de dias longos (21, 28, 35, 42 e 49) as parcelas e as cultivares de crisântemo de corte (Calábria, Dragon, Rebasco, Sheena e Apricot Repin) as sub-parcelas
The chrysanthemum is classified as a short-day plant for flowering, with critical photoperiod of 13 hours (Gruszynski, 2001)
Summary
O crisântemo é uma das espécies mais comercializadas como flor de corte. No seu cultivo utilizam-se dias longos para induzir o crescimento vegetativo, de forma que a planta se mantenha neste estágio durante período suficiente para a floração comercial. Sendo os números de dias longos (21, 28, 35, 42 e 49) as parcelas e as cultivares de crisântemo de corte (Calábria, Dragon, Rebasco, Sheena e Apricot Repin) as sub-parcelas. As cultivares de crisântemo de corte apresentaram desempenho agronômico que permitiu a diminuição do número de dias longos de exposição, de 35 a 45 dias normalmente praticada, para 21 a 28 dias, reduzindo o tempo de cultivo. Quality is defined as the set of attributes which makes the product saleable Consumer acceptability of these products is evaluated by visual characteristics, such as size and shape, health conditions, turgor and maturity (Magalhães et al, 2005). Factors, such as, number of plants, genetics and environmental, are determinant for the production of floral stems with quality. It is necessary that the plants remain in cultivation, on average, between 35 and 45 long days
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