Efeito de substrato na produção de mudas de aroeira-do-sertão (Myracroduon urundeuva Fr. All.)

Abstract

Demand for substrate that aims to supply nutrients and provide adequate conditions for the growth and development of seedlings of forest species with good quality has been growing lately. Certain organic materials present important characteristics for seedling development, but studies mainly for native species are scarce. However, there is still scarcity of information on substratum formulations for native forest species. The general objective of this work was to study formulations of renewable substrates for emergence, growth and development for the production of seedlings of Myracroduon urundeuva Fr. All under forest nursery conditions. The experiment was carried out at the forest nursery of the Universidade Tecnológica Federal do Paraná - Campus Dois Vizinhos. Five treatments were elaborated: t1 (100% underground soil); t2 (60% underground soil, 20% vermiculite, 10% sand and 10% aviary bed), t3 (50% subsoil soil, 10% vermiculite, 20% charcoal, 10% sand and 10% aviary bed; t4 (40% subsoil, 20% vermiculite, 20% vermiculite, 20% sand, and 10% sand bed); 10 litter bed The seedlings were produced in 290 cm³ tubes, randomized blocks design with four replications and ten seedlings per replicate, totaling 40 seedlings per treatment.The physical, physiological and morphological quality of the seedlings produced were analyzed, the physiological evaluations in a nursery for 15 days after sowing. Four morphological evaluations were carried out at 7, 14, 21, 28 days after stabilization of the emergence and there was no significant difference between treatments.