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Influence of fertilization on the post-harvest durability of roses in integrated production system

Lessa, M.A., Almeida, E.F.A., Reis, S.N., Barbosa, S.S., Resende, S.G., Nogueira, D.A.
Acta horticulturae 2013 no.970 pp. 367-371
Calopogonium mucunoides, Rosa, buds, containers, corolla, cut flowers, durability, experimental design, fertilizers, floriculture, intercropping, plastics, temperature, vase life, weight loss, Brazil
Efficiency in the production process of cut flowers is essential to increase the post-harvest durability. The fertilizer management can influence the vase life of cut flowers. In this context, this study aimed to evaluate the post-harvest durability of roses grown in four chemical fertilizer percentages (25, 50, 75 and 100%) versus presence and absence of green manure (Calopogonium mucunoides) intercropped with the rose bush. The experiment was conducted in the laboratory of plant science of the Epamig Floriculture Technology Center of São João del Rei, Minas Gerais (Brazil). Flower stalks of 'Carolla' rose were harvested, conditioned in plastic containers with distilled water and kept at room temperature (22 to 25°C). The experimental design was completely randomized with eight treatments, four replicates and three flower stalks per plot. The assessments were performed every two days. It was observed that the flower stalks grown intercropped with green manure had higher fresh weight loss (6.47 g) compared with flower stalks grown without green manure (4.21 g). No significant difference between flower stalks grown under different treatments for variable vase life was observed. The flower stalks showed excellent quality, and the opening of petals was verified by the increased diameter of the flower bud. On the first day of evaluation, the buds had an average diameter of 29.82 mm, showing a diameter of 66.78 mm in the final evaluation. Intercropping rose bush with green manure (Calopogonio muconoides) adversely affected the post-harvest quality of roses, forming less turgid flower stalks.