Malhas de sombreamento e concentrações de ácido salicílico no cultivo de cenoura em sistema orgânico de produção

Abstract

Plants, when subjected to different light levels from which they are adapted, may exhibit changes in physiological, morphological, and growth characteristics. Thus, they can provide desirable responses in quality, production and productivity, of products favoring so it is to use colored shading meshes in crops of various species of economic importance. Another factor that can influence the cultivation is salicylic acid, which is a natural elicitor and can present itself as an alternative, which besides being a natural compound, can be used in the organic production.. Thus, objective this work was to evaluate the characteristics of cv. Nantes carrots submitted to different shading meshes and salicylic acid concentrations. The experiment was conducted at the Federal University of Fronteira Sul - UFFS, Laranjeiras do Sul campus/PR from April to July 2018. The treatments consisted of 50% shading meshes on these colors: black, red and full sun (control) and salicylic acid concentrations of 0.5mM, 1.0mM, 1.5mM, 2.0mM and 0 (zero) as a control. The study design was a randomized complete block design in a 3x5 factorial scheme with four replications. Higher values of length, diameter, fresh root mass and yield were obtained in the control. In the aerial part length, in cultivation under black mesh, it presented higher averages. For commercial classification length, the highest percentage of carrots was expressed in class 14 yield were obtained under black mesh. The cultivar Nantes did not increase yield using shading meshes, although they presented desirable agronomic characteristics in all shading meshes used.