Resumo

LLERENA-RAMOS, Luis Tarquino et al. Morphoagronomic Evaluation of Lettuce Plants (Latuca sativa L.) Grown in Aquaponics and With chitosan Application. Terra Latinoam [online]. 2024, vol.42, e1811.  Epub 30-Ago-2024. ISSN 2395-8030.  https://doi.org/10.28940/terra.v42i0.1811.

Bioestimulants such as chitosan in traditional agriculture have proven effective in promoting plant growth and development, as well as protecting them from diseases. However, in aquaponic production systems its effect is not documented, therefore the objective of the present work was to determine the effect of chitosan concentration (0, 500 and 1000 mg L-1) in three varieties (Great Lakes, Regina 500 and Red Rock) of lettuce (Latuca sativa L.), on production parameters in a circular aquaponics system. Using a completely randomized design with a 3×3 factorial arrangement, chitosan was applied by spraying at 10 and 45 days after transplantation. After the analysis of variance, the differences due to the variety were determined using the Tukey test and the effect of chitosan concentration through orthogonal polynomials, in addition to a correlation analysis and simple linear regression between the yield, height, number and length of the leaves. The results showed that the variables number of leaves, length of leaves and root, plant weight, plant height and yield increased as the dose of chitosan increased. The Red Rock variety outperformed the Regina 500 and Great Lakes varieties. No presence of insects or diseases was detected. It is concluded that chitosan favors the growth, development and yield of the lettuce plant in a circular aquaponic system, especially with doses of 1000 mg L-1 of chitosan, and that with respect to these same variables, the Red Rock variety surpasses to the Regina 500 and Great Lakes varieties.

Palavras-chave : biostimulant; productive parameters; performance.

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