Abstract
The gerbera is a prominent culture that has gained in the Brazilian market of flowers and ornamental plants and there is a great demand for adequate substrates for its production. This study was conducted to evaluate the growth and distribution of dry mass and nitrogen in potted gerbera, depending on the substrates and cultivars. Experimental design was randomized blocks in a 5x2 factorial arrangement (5 substrates and 2 cultivars). Red and Cherry cultivars were evaluated at 1, 15, 29, 43 and 50 days of acclimation (DAA) to the leaves number, leaf area, dry mass of aerial parts (leaf and flower) and accumulation of nitrogen. From 29 DAA, the inflorescence has established as the drain and has contributed significantly to the total dry mass. The accumulation of nitrogen was similar in vegetative and reproductive periods. The traits evaluated varied depending on the substrate used, influenced by physical and chemical properties of the same. The growth, dry matter and nitrogen distribution potted gerbera cultivars Cherry and Red are influenced by physical and chemical characteristics of substrates, with better results in substrates with bulk density of less than 530 kg m-3 and pH values between 5.5 and 6.8
Highlights
a prominent culture that has gained in the Brazilian market of flowers
there is a great demand for adequate substrates for its production
the inflorescence has established as the drain
Summary
A gérbera é uma planta herbácea perene, pertencente à família Asteraceae. É originária da África do Sul e apresenta potencial para ser produzida em várias áreas geográficas, desde que o nível de tecnologia permita (MERCURIO, 2002). Pela importância que a cultura representa no mercado de flores e plantas ornamentais como flor envasada, o estudo das características dos substratos para o seu cultivo é imprescindível (LUDWIG et al, 2011). O substrato utilizado é um dos fatores tecnológicos que influenciam o desenvolvimento de plantas cultivadas em recipientes, distinguindo-se do cultivo em solo principalmente pela área reduzida para o crescimento das raízes. Substratos no desenvolvimento de cultivares de gérbera envasada se especialmente à disponibilidade de nutrientes, enquanto a CE fornece estimativa do conteúdo de sais solúveis do meio de crescimento. Dessa forma, o presente trabalho foi conduzido com o objetivo de avaliar o crescimento, a distribuição de massa seca e de nitrogênio em plantas de gérbera envasada, em função dos substratos e cultivares
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