Avaliação do potencial de Tagetes erecta L. na fitoextração de sódio

Abstract

Soils with salinity problems are found in all parts of the world, compromising agricultural productivity and the physical-chemical characteristics of these soils. This study aimed to evaluate Tagetes erecta L. as a sodium phytoextractor in a plintosol, on the western border of Rio Grande do Sul. The experiment was conducted in a completely randomized design, with five treatments and four replications. plastic of known volume (10L). The transplanted seedlings were in the pre-anthesis stage, the plants were cultivated with the cultural treatments necessary for the culture. Root length, root volume, total dry matter mass, plant height and stem diameter were evaluated. The data were subjected to analysis of variance and regression analysis. The results showed that Tagetes erecta L. showed moderate tolerance to saline stress, with positive development at low and medium doses of percentage of total sodium (TSP), however at high doses the plant showed low development and growth. It is concluded that the plant has moderate potential for phytoextraction, being an alternative for an area with good management and an option for genetic improvement studies focusing on phytoextraction.