EVALUATION OF SUBSTRATES IN THE EMERGENCE AND INITIAL GROWTH OF Cryptostegia madagascariensis Bojer ex Decne (PERIPLOCOIDEAE, APOCYNACEAE)

Abstract

madagascariensis is an invasive species highly adapted to the semiarid region, being widely disseminated through water courses by the wind and fostered by man, particularly for its popularity as an ornamental plant, due to its permanent foliage and intense lilac flowering. The objective of this work was to evaluate the germination and initial development of the gay widow in different substrates. To this end, an Entirely Matched Design (DIC) trial was set up, with 12 treatments, which consisted of the types of substrates (sand; soil; goat manure; bagana; coconut dust; sand + manure; sand + coconut dust; sand + bagana; soil + manure; soil + coconut dust; soil + bagana and soil + manure + bagana) in 4 repetitions of 16 seeds. Styrofoam trays with 128 cells were used, containing the respective substrates, with one seed per cell being sown. At 20 days after sowing, the final evaluation was carried out, measuring: percentage of emergence, plant height; number of leaves; stem diameter; root length; shoot dry weight; root dry weight; Dickson's quality score. With the results, it was observed that the substrates bagana and coconut powder provided better results for germination. In the simple substrates bagana and coconut dust and in the mixtures sand + goat manure, sand + coconut dust and soil + coconut dust, the most expressive values ​​were observed for all the variables studied.