Resumen

TADEU DIAS, João Paulo  y  DA SILVA, Maria Aparecida. Effect in greenhouse of commercial biostimulant on sugarcane seedlings growth. Biot. Veg. [online]. 2020, vol.20, n.1, pp. 23-31.  Epub 01-Mar-2020. ISSN 2074-8647.

Plant growth regulators promote growth and development in sugarcane (Saccharum officinarum L.) seedling in field. Therefore, it is essential to evaluate the effect on different cultivars avoiding unnecessary expenses. The aims of this work was to determine the effect of a commercial biostimulant on the growth of seedlings of two sugarcane cultivars in greenhouse. The experiment was a randomized complete block design, in factorial scheme (2 x 6), with 12 treatments, two commercial cultivars (CTC 04 and CTC 9002) and six biostimulant concentrations, distributed in four randomized blocks. After 30 days of planting, the biostimulant was applied directed to the two open leaves of the plant. The commercial biostimulant Stimulate® (cytokinin, auxin, and gibberellin) was used. The treatments were control (without application), 0.5 ml l-1, 1ml l-1, 2 ml l-1, 4 ml l-1, 8 ml l-1 of commercial product. The variables evaluated were plant height (cm), number of internodes, stem diameter, fresh and dry mass of shoot and root (g). The results demonstrated that at this level is possible to early detect some effect of the biostimulant Stimulate® on sugarcane plant growth. The variables as number of internodes, plant height and stem diameter decreased with high biostimulant concentration tested. It demonstrated the inhibitory effect or growth retardation of the vegetative part. However, biostimulant promoted the root growth with increment on fresh and dry root mass. The results in greenhouse point up the bases for doses adjustment, cost reduction and technical assistant to the farmers. It is recommended that further studies to ensure positive recommendation results in field.

Palabras clave : biostimulation; multiplication; physiology; Saccharum officinarum L.

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