Substratos renováveis para produção de mudas de Guanandi (Calophyllum brasiliense Cambess)

Abstract

The substrate is the main element to obtain a product of high standard and acceptable in the market and the genetic material of origin that is used is also of good results, the substrate that provides the necessary conditions for the development and the correct growth of the species, since in it the plant can find sources of nutrients and adequate physical quality to develop. This work aims to determine an appropriate substrate formulation to produce good quality and healthy seedlings of the specie guanandi (Calophyllum brasiliense). Based on renewable substrates from the region of Guaraqueçaba-PR. Five treatments: subsoil soil, banana residue and pupunha palm heart residue. The treatments tested were: T1: subsoil soil; T2: subsoil soil + banana residue in the 0.5: 0.5 portion; T3: subsoil soil + pupunha palm heart residue in the 0.5: 0.5 portion; T4: subsoil soil + banana residue + pupunha palm heart residue in the 0,5:0,25:0,25 portion; T5: subsoil soil + banana residue + pupunha palm heart residue in the 0,2:0,4:0,4 portion. Each treatment with four repetitions and 20 plants per repetition, 80 samples per treatment. Before sowing, the seeds were submitted to dormancy overcoming treatments using the mechanical scarification method, with the tegument knitting in the opposite region to the hilum. For the substrates were used plastic containers, made with recycled polymers in the volume of 290 cm³. The percentage, speed index and mean time of seed emergence were evaluated. The relationship between neck height and neck diameter was determined every 30 days for 2 months. A completely randomized design was used (DIC), and the obtained data were submitted to analysis of variance by the test F Fisher using free software Assistat, version 7.7, and when it becomes necessary, the means were compared by the test of Tukey the 5% of probability, using the same software. From the physiological and morphological analyzes the best substrate for the production of seedlings of Calophyllum brasiliense it was the treatment 2, 4 and 5, where there was the subsoil soil associated with banana residue and palm heart residue.