Abstract
Seedlings produced in containers can be influenced by the materials used in the substrate, which affects the robustness of the plants and, indirectly, the time required for transplanting and for the plants to become established in the field. The aim of this study was to determine the chemical properties of different materials and on the absorption of macronutrients in Pochota fendleri seedlings (cedro-doce). The treatments were: sand (Sa), soil (So), sand+soil (Sa+So), and sand+soil+crushed Brazil nut capsules (Sa+So+CNC). The growth and macronutrient content were evaluated at 60 days after thinning. The amount of macronutrients in the substrate increased with the addition of crushed Brazil nut capsules. The use of different materials for the substrate, particularly Sa+So+CNC, had a positive influence on the morphological characteristics of seedlings, which ensuring high rates of establishment and survival after outplanting, making commercial reforestation with Pochota fendleri attractive.
Highlights
The forest-based sector can be considered as an important component of the Brazilian economy, where it has a significant contribution through the generation of products, taxes, jobs, and income (CNI, 2017)
In relation to biomass production, evaluated by quantifying the weight of the shoot, root, and total dry weight (Table 3), the results presented here made it possible to answer part of the research problem, noting in the post-transplant evaluation of sweet cedar seedlings (Pochota fendleri) that biomass production positively influenced the inclusion of crushed Brazil nut capsules in the substrate (Sa+So+CNC substrate)
The pH is an extremely important chemical characteristic (MENEGATTI; SOUZA; BIANCHI, 2019) since it is directly related to the availability of nutrients to the plants, where unsuitable values can affect plant development, especially in substrates with a pH of less than 5, characterized by excessive acidity and facilitating the uptake of large amounts of toxic elements (SOUZA et al, 2020b)
Summary
The forest-based sector can be considered as an important component of the Brazilian economy, where it has a significant contribution through the generation of products, taxes, jobs, and income (CNI, 2017). The growing expansion of this sector has driven forestry investors to opt for the cultivation of native species (ABAF, 2016; IBÁ, 2017). The success of reforestation projects depends mainly on the quality of seedlings produced in nurseries (MARQUES et al, 2018). In this case, they should have characteristics that help the maximum survival rate and rapid initial growth after planting (SMIDERLE; SOUZA; MENEGATTI, 2020a).
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