Post-harvest of safflower flower stems harvested at different times and submitted to different preservative solutions

AUTOR(ES)

Menegaes, Janine Farias

FONTE

Ornam. Hortic.

DATA DE PUBLICAÇÃO

29/04/2019

RESUMO

Resumo A conservação das hastes florais cortadas tem como finalidade prolongar a durabilidade, manter a qualidade e reduzir as perdas após a colheita, propiciando um período maior de vida útil e comercialização. Assim, o objetivo deste trabalho foi avaliar a qualidade e a durabilidade na pós-colheita de hastes florais frescas de cártamo (Carthamus tinctorius L.) colhidas em diferentes épocas e submetidas a diferentes soluções conservantes. O experimento foi conduzido em delineamento inteiramente casualizado e, organizado em esquema fatorial 4x8 (quatro soluções conservantes e oito épocas de colheita), com quatro repetições, sendo cada unidade experimental constituída de cinco hastes florais. O cultivo das hastes florais de cártamo ocorreu no Setor de Floricultura e as épocas de colheita das mesmas foram realizadas no início da floração a partir da semeadura realizada na primeira quinzena estacional: no inverno, primavera e verão de 2016, outono, inverno, primavera e verão de 2017 e outono de 2018. E, as soluções conservantes foram: água destilada (testemunha); água destilada + sacarose 2%; água destilada + hipoclorito de sódio 2% e água destilada + sacarose 2% + hipoclorito de sódio 2%. As hastes florais foram avaliadas quanto a notas de qualidade, desidratação e absorção das soluções conservantes. Observou-se que as hastes florais de cártamo apresentaram vida de vaso em média de nove dias, com absorção de solução na média de 0,021 mL dia−1 g−1 de massa fresca e que o uso dos conservantes não foi benéfico à conservação em pós-colheita.Abstract The conservation of the cut flower stems aims to prolong durability, maintain the quality and reduce the losses after harvest, providing a greater period of lifespan and commercialization. Thus, the objective of this work was to evaluate the quality and durability in post-harvest of fresh safflower (Carthamus tinctorius L.) flower stems harvested in different times and submitted to different preservative solutions. The experiment was conducted in entirely randomized design and, organized in 4x8 (four preservative solutions and eight harvest seasons) factorial scheme, with four repetitions, and each experimental unit consisting of five floral stems. The cultivation of floral stems of safflower occurred at Floriculture Sector and the harvest seasons of them were carried out in the beginning of flowering from the sowing performed in the first seasonal half: in winter, spring and summer of 2016, autumn, winter, spring and summer of 2017 and autumn of 2018. And, the preservative solutions were: distilled water (control); distilled water + sucrose 2%; distilled water + sodium hypochlorite 2% and distilled water + sucrose 2% + sodium hypochlorite 2%. The floral stems were evaluated in relation to quality notes, dehydration and absorption of preservative solutions. We observed that the floral stems of safflower presented shelf life in average of nine days, with absorption of solution in average of 0.021 mL day−1 g−1 of fresh mass and that the use of preservatives was not beneficial to conservation in post-harvest.

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