Evaluation of the normalized difference vegetation index and the concentration of carotenoids in limestone and silicate experiments in lettuce

Abstract

The objective was a evaluate the concentration of chlorophyll through method NDVI and the carotenoid concentration by spectrophotometry in Regina lettuce (Lactuca sativa) in order to check between treatments with dolomitic limestone and calcium and magnesium silicate which will guarantee a better result in the presence of Meloidogyne javanica. The experiments were carried out in five – liter pots with Argisoil an in grasshouse. Two experiments were carried out (limestone and silicate), both with four rate (0 g; 1.41 g; 2.83 g; 4.25 g and 0 g, 0.425 g; 0.850 g; 1.28 g, respectively) and twelve repetitions, totaling 48 experimental units for each experiment, in a completely randomized design. The NDVI was evaluated using a passive terrestrial sensor. The carotenoid concentration was performed with the aid of the spectrophotometer. The data were submitted to analysis of variance using the F test (p < 0.05), the means were compared using the Tukey test at 5% significance. The experiments did not show significant results for the parameters evaluated in plants with nematodes. It is concluded that the experiments with limestone and silicate did not present significant difference, and therefore, there was no increase in the concentrations of the indices evaluated.