Helicônia "Golden Torch": produtividade e qualidade pós-colheita sob diferentes fontes e doses de silício

Abstract

RESUMOObjetivou-se, neste trabalho, avaliar a produtividade de hastes florais e a qualidade pós-colheita no cultivo de helicônia "Golden Torch" em diferentes fontes e doses de silício. O experimento foi montado em blocos casualizados e disposto em fatorial 3 x 3 com quatro repetições utilizando-se as fontes cinza de bagaço da cana-de-açúcar, MB-4 e Rocksil ® nas doses 0, 400 e 800 kg ha -1 de SiO 2 equivalentes a cada fonte. Os resultados obtidos demonstraram que o número de inflorescências cresceu com a fonte Rocksil ® , o comprimento de brácteas foi maior com a interação entre cinza e a dose 400 kg ha -1 , as perdas de massa ao oitavo dia pós-colheita foram menores com a interação entre Rocksil ® e a dose 400 kg ha -1 , a queima de brácteas ao oitavo dia pós-colheita apresentou menor valor com a fonte Rocksil ® na dose 800 kg ha -1 enquanto o teor de Si no solo cresceu na profundidade de 0-0,20 m com o aumento da dose de silício; já para as variáveis comprimento de hastes florais, massa de hastes florais no dia da colheita e no oitavo dia após a colheita, teor de silício foliar e no solo na profundidade de 0,20-0,40 m não houve diferença significativa entre os tratamentos pelo teste de agrupamento de médias de Scott-Knott. A adubação com silício aumentou a produtividade e a qualidade pós-colheita, destacando-se a fonte Rocksil ® na dose 800 kg ha -1 . Palavras-chave: adubação silicatada, flores tropicais, produçãoHeliconia Golden Torch: Productivity and post-harvest quality under different sources and doses of silicon ABSTRACT The objective of this study was to evaluate productivity and postharvest quality of helicônia "Golden Torch" under different sources and doses of silicon. The experiment was conducted in randomized blocks in 3 x 3 factorial design with four replications, using the sources ash from sugarcane bagasse, MB-4 and Rocksil ® in doses of 0, 400 and 800 kg ha -1 from each source. The results showed that the number of inflorescences increased with the source Rocksil ® , the length of bracts was higher with interaction between ash and dose of 400 kg ha -1 , the mass loss on the 8 th day postharvest was lower with the interaction between Rocksil ® and dose of 400 kg ha -1 , the burning of bracts on the 8 th day post-harvest was lowest with source Rocksil ® under the dose of 800 kg ha -1 and Si content in the soil in the depth of 0-0.20 m increased with increasing dose of silicon. As for the variables length of flower stalks and mass of flower stalks on the day of harvest and on the 8 th day after harvest, content of silicon in leaf and in soil in the depth of 0.20-0.40 m there was no significant difference between treatments by grouping test of Scott-Knott. The silicon fertilization increased production and post-harvest quality, especially the source Rocksil ® in the dose of 800 kg ha -1 .

Yield and quality of inflorescences of 'Golden Torch' heliconia in different shaded environments

“…The number of inflorescences is a very important parameter, because the product of heliconias is the flower stem. Therefore, the higher number of produced flower stems enables greater competitiveness and increased profitability for producers (Paulino et al, 2013;Albuquerque et al, 2014;Beckmann-Cavalcante et al, 2015).…”

“…Tropical floriculture is a good investment alternative, because it is an activity that requires a small area for cultivation and the plants have short cycle and high added value, which provides the producer with a rapid return on the invested capital (Paulino et al, 2013). Among the tropical species, heliconias stand out as cut flowers, due to their exotic beauty with diversity of colors and shapes, resistance to handling, transport and increased postharvest durability (Rodríguez, 2013;Albuquerque et al, 2014).…”

Nitrogen and potassium fertilization in yield and macronutrients contents of heliconia cv. Golden Torch

“…Golden Torch, in twelve months of evaluation, which represented an amount of 10 to 10.5 stems per month. Similarly, Paulino et al (2013) obtained mean yield of 9.3 to 10.2 stems m -2 per month when different sources and doses of silicon were applied in the soil cultivated with heliconia cv. Golden Torch.…”

“…Despite the researches in the literature on the demands in the areas of soil fertility and mineral nutrition for heliconias Farias et al, 2013;Paulino et al, 2013;Albuquerque et al, 2014;Viégas et al, 2014;Amaral et al, 2015;Beckmann-Cavalcante et al, 2015;Castro et al, 2015) and although these aspects constitute the most determinant factors for the production of this crop, as well as its quality and resistance to diseases, the results come from specific edaphoclimatic conditions. Thus, further studies are necessary for regions with potential for commercial cultivation, such as the state of Piauí.…”

Silicon in the turgidity maintenance of American lettuce

“…The increase in Si doses may provide less weight loss in vegetables compared to treatments without silicon (Guimarães et al, 2010;Paulino et al, 2013). The loss of fresh matter is mainly by dehydration or perspiration of the vegetable considering the Si is deposited on the epidermis of the plant's tissue it contributes to the reduction of water loss.…”