Gherkin cultivation in saline medium using seeds treated with a biostimulant/Cultivo de maxixeiro em meio salino a partir de sementes tratadas com bioestimulante

• Published in: Acta scientiarum. Agronomy Vol. 40; no. 1; p. 59
• Main Authors: de Souza Neta, Maria Lilia, de Assis de Oliveira, Francisco, Torres, Salvador Barros, Souza, Antonia Adailha Torres, Silva, Dennis Darkyan Almeida da, Santos, Sandy Thomaz dos
• Format: Journal Article
• Language: Spanish
• Published: Universidade Estadual de Maringa 01.01.2018
• ISSN: 1679-9275; 1807-8621
• DOI: 10.4025/actasciagron.v40i1.35216

The objective of this study was to evaluate the effects of a biostimulant on gherkin seeds, cultivar Liso de Calcuta, under conditions of salt stress. A split-plot experimental design with five replications was used; the main plot was represented by two levels of irrigation water salinity (0.5 and 3.5 dS [m.sup.-1]), and the subplot was composed of five biostimulant doses applied as a seed treatment (0, 5, 10, 15, and 20 mL [kg.sup.-1]). The following variables were evaluated: the number of leaves; number of branches; length of the largest branch; leaf, stem, fruit and total dry matter; number of fruits; average fruit weight; and fruit production. The values of all analyzed variables decreased with an increase in irrigation water salinity regardless of the biostimulant dose, but in the absence of salt stress, biostimulant use led to an increase in the number of leaves and branches, the length of the largest branch and biomass accumulation. Biostimulation was not effective in reducing the effects of salinity on gherkin production, but it increased fruit production regardless of the salinity level. Keywords: Cucumis anguria, horticulture, salt stress, bioregulator. Objetivou-se avaliar o efeito da aplicacao do bioestimulante em sementes de maxixeiro, cultivar Liso de Calcuta, em condicoes de estresse salino. Utilizou-se o delineamento experimental em parcelas subdivididas, a parcela principal representada por dois niveis de salinidade da agua de irrigacao (0,5 e 3,5 dS [m.sup.-1]) e a subparcela composta por cinco doses de bioestimulante aplicados via tratamento de sementes (0, 5, 10, 15 e 20 mL [kg.sup.-1]) em cinco repeticoes. Avaliaram-se as seguintes variaveis: numero de folhas, numero de ramos, comprimento do maior ramo, massa seca de folhas, caule, frutos e total, numero de frutos, massa media de frutos e producao de frutos. A salinidade da agua de irrigacao reduziu todas as variaveis analisadas, independente da dose de bioestimulante; o uso de bioestimulante, na ausencia do estresse salino, proporcionou aumento do numero de folhas, ramos, comprimento do maior ramo e do acumulo de biomassa. O bioestimulante nao e eficiente para reduzir o efeito da salinidade sobre a producao de maxixeiro, mas aumentou a producao de frutos, independente da salinidade. Palavras-chave: Cucumis anguria, olericultura, estresse salino, biorregulador.