Abstract
This work had as objective to verify the effect of six concentrations of indolbutiric acid (IBA) in the rooting of herbaceous cuttings of fig (Ficus carica L.) under intermittent mist irrigation, at three different times. The assays were installed in May, September and January, where in each time the used experimental design was entirely randomized, with six concentrations of IBA (0, 500, 1,000; 1,500;, 2,000; 2,500 and 3,000 mg L-1). The cuttings were collected at the Experimental Station of Unesp, located in the municipal district of Selvíria, Mato Grosso do Sul, Brazil, standardized at 10 cm long and two leaves. After the cutting preparation, they were immersed in Metiltiofan solution for one minute, and later immersed in IBA solutions for 10 minutes. Next, they were planted in flower boxes containing vermiculite. They were transported to a greenhouse, with 50% light reduction, with overhead irrigation of the intermittent mist type. The analyzed variables were: percentage of surviving cutting and taken root, number of roots and mass, maximum length of the root system and dry matter of the root. In the conditions in which the study work was conducted, it can be concluded that: the herbaceous propagation of fig is viable; there was an effect of IBA in May only, where the best concentration was 1,000 mg L-1; the best times for herbaceous cutting of fig are in September and January, without the use of IBA, in which the best results were obtained for the percentage of rooted cuttings.
Highlights
A figueira é cultivada comercialmente, no Brasil, desde o início do século passado, mais precisamente a partir de 1910, na cidade paulista de Valinhos
De acordo com Zuffellato-Ribas e Rodrigues (2001), em estacas herbáceas retiradas no verão, os ramos estão em pleno crescimento e apresentam maiores doses de auxinas em relação àquelas que são retiradas no outono e inverno
- as melhores épocas para estaquia herbácea de figueira são setembro e janeiro, sem utilização de indolbutiric acid (IBA), nas quais foram obtidos melhores resultados quanto à porcentagem de estacas enraizadas;
Summary
Os ensaios foram instalados nos meses de maio/2004, setembro/2004 e janeiro/2005, em telado com sombreamento de 50% da luz natural. As estacas receberam tratamento com IBA nas doses de 500, 1.000, 1.500, 2.000, 2.500 e 3.000 mg L-1 e testemunha (sem IBA), em que aproximadamente 2 cm da base das estacas ficaram imersos na solução de IBA por 10 min. A base das estacas do tratamento-testemunha ficou imersa em água por 10 min. As estacas ficaram em nebulização intermitente, e o tempo de nebulização foi de 10s a cada intervalo de 5 min., sendo determinado de modo a manter uma fina camada de água sobre a superfície das folhas no momento de maior evapotranspiração, sem causar escorrimento. 40 dias após a instalação para cada época, foram realizadas as seguintes avaliações: porcentagem de estacas sobreviventes, porcentagem de estacas enraizadas, número de raízes, comprimento máximo do sistema radicular e massa da matéria seca da raiz. Os dados em porcentagem foram transformados em raiz (x + 1) e os dados em número foram transformados em log (x + 1)
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