Propagação da lichieira por alporquia em diferentes substratos e épocas do ano

• Autor(a) principal: Lins, Leila Cristina Rosa de
• Data de Publicação: 2013
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/4593
• topic: Litchi chinensis Sonn; Enraizamento; Substrato; Litchi chinensis Sonn; Rooting; Substrate; CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOTECNIA

The aim of this study was to assess the influence of different times of the year and substrates on the rooting of air layers of lychee (Litchi chinensis Sonn.) for the production of seedlings to ensure the formation of uniform and productive orchards. Air layers were done in plants of the Bengal cultivar using leafy and healthy woody branches, with about 1.0 to 1.5 cm in diameter, in which complete girdling were performed with 2.0 cm wide at a distance of 30 to 40 cm below the apex. Then the branches were wrapped in moistened substrate. Air layering was made at six times of the year (January, March, May, July, September and November) and two substrates were used (coconut fiber and sphagnum) in a 6 x 2 factorial design in a randomized block with ten replicates, each block represented by a matrix plant. After 90 days, layers were separated from the matrix plant and evaluated for rooting and callus formation; root number, considering only the primary roots; length, area, volume and diameter of the roots; dry mass of roots and calluses, in addition to the dry mass of shoots (leaves and stems). The months of January, March, September and November showed the best results for allanalyzed variables related to rooting. With respect to the substrates, the only difference was in the months of January and March regarding root number and dry mass of roots, where the sphagnum showed the best results. The month of July was more favorable to the formation of calluses. The period between September and March was more suitable to the propagation of lychee, when there were rooting percentages above 90%, in addition to the formation of large amounts of roots.