Initial Growth and Quality of Toona ciliata Seedlings under Different Substrates

Abstract

In producing forest seedlings, the use of residues may be an option to improve seedling quality. Thus, the objective of this study was to evaluate the initial growth and quality of Toona ciliata seedlings on different substrates. The experimental design was completely randomized with seven treatments consisting of commercial substrate (CS), vermicompost (VC), urban waste compost (UWC) and mixtures in proportions of 50% (CS + VC, CS + UWC and VC + UWC) and 33% (CS + UWC + VC), with twelve replications. The use of substrates composed of organic residues 120 days after sowing shows potential for producing Toona ciliata seedlings. The combination of substrate components provides higher seed growth and quality than unmixed substrates. Compositions of 50% UWC or 50% VC + 50% CS are efficient in growth and seed quality.

Decomposed Babassu Biomass: New Substrate for the Production of Jacaranda mimosifolia D. Don Seedlings

“…Using 20 to 100% DBB, increased DQI (P <0.05) compared to the control, but the 40/60 relationship between soil and DBB provided seedlings with better DQI results (Figure 3). The quality of seedlings can determine success during the establishment of the forest stand (De Marco et al, 2020). The DQI produces a relationship between the morphological variables, suggesting higher values for higher quality seedlings (Prato et al, 2020).…”