Abstract
ABSTRACT The purpose of this work was to evaluate the influence of cutting the apex of the main stem of marigold plants on floral capitula yield. The experiment was carried out in a randomized complete block design, with five replicates. The following removal stages of the main stem apexes were studied: control (without pruning), up to 10 leaves, up to 15 leaves and visible flower bud. Three harvest periods were also evaluated: July, August and September, composing a factorial experiment in a 4x3 arrangement. The diameter, number, fresh matter and the dry capitula were evaluated. The most significant effect of cutting the apex of the main stem on fresh and dry matter of the capitula was obtained when the technique was performed at the time the plants had up to 15 leaves and visible flower bud. The harvesting performed in September showed to be the most promising, since it presented the larger diameter, higher number and higher fresh matter and the dry capitula.
Highlights
O objetivo deste trabalho foi avaliar a influência da poda da haste principal de plantas de calêndula na produção de capítulos florais
Considering the potential presented by this technique on several species, the purpose of this work was to study the influence of pruning the main stem of marigold plants in different stages of growth and its influence on the yield of capitula in different periods of the year
This result highlights that the utilization of pruning the main stem does not interfere in the emission of capitula neither on its diameter
Summary
O objetivo deste trabalho foi avaliar a influência da poda da haste principal de plantas de calêndula na produção de capítulos florais. Houve efeito significativo da poda da haste principal na matéria fresca e seca de capítulos, quando realizada no momento em que a planta possui mais de 15 folhas e apresenta botão floral visível. The use of apical cutting or pruning is a common management technique in fruit, forest and some horticultural species in which, with the removal of the stem apex, an increase in branching is obtained and the development and growth of those branches contribute to obtain a higher number of flowers (Taiz & Zeiger, 2013). Considering the potential presented by this technique on several species, the purpose of this work was to study the influence of pruning the main stem of marigold plants in different stages of growth and its influence on the yield of capitula in different periods of the year
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