SUBSTRATE COMPOSITION AND PHYSIOLOGICAL PARAMETERS OF GROWTH OF SEEDLINGS GUAPURUVU (SCHIZOLOBIUM PARAHYBA VELL. BLAKE)

Abstract

Schizolobium parahyba Vell. Blake is a native species of the Atlantic river forest that its wood is very efficient to make doors, fruit packaging, to use in construction, interior works and other uses. This work aimed to evaluate the influence of substrate composition on emergence and growth physiological parameters of Schizolobium parahyba seedlings. Selected seeds were subjected to grow in the following compositions of the substrate: T1) witness (haplustox - LV), T2) LV + potato processing waste (1:1) + chemical treatment (TQ: 100 of limestone + 100 g of superphosphate), T 3) LV + earthworm humus (1:1) + TQ and T 4) LV + sand + cattle manure (1:1:2) + TQ. Seedling emergence was evaluated at 21 days after sowing (DAS) and at 60 DAS measured the shoot height, root length, fresh weight of shoot, root fresh weight, dry weight of shoot and root dry weight. The use of earthworm compost, cattle manure and waste from potato processing proved effective for Schizolobium parahyba seedlings production, since no significant differences were verified among the treatments applied. The use of organic sources to supplement the substrate is of paramount importance for native species seedlings production.