Effect of basalt rock powder associated with different substrates on the initial development of aroeira seedlings (Myracrodruon urundeuva)

Ademir Kleber Morbeck De Oliveira,Fabio De Freitas Pires,Sílvia Rahe Pereira,Talles Edmundo De Assis,José Carlos Pina,José Antoino Maior Bono,Rosemary Matias

doi:10.33448/rsd-v9i12.10790

Ademir Kleber Morbeck De Oliveira, Fabio De Freitas Pires + Show 5 more

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https://doi.org/10.33448/rsd-v9i12.10790

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Abstract

This study aimed to evaluate the initial growth of aroeira in Oxisol soil with the addition of different organic (humus and vermicompost) and organic/mineral substrates (commercial substrate) and rock powder. Seeds were collected and, after germination, transplanted to different types of substrate. The treatments assembled, with different proportions of compounds, were: T1 (50% humus + 50% Oxisol); T2 (50% commercial substrate + 50% Oxisol); T3 (50% vermicompost + 50% Oxisol); T4 (40% humus + 40% Oxisol + 20% rock powder); T5 (40% commercial substrate + 40% Oxisol + 20% rock powder); T6 (40% vermicompost + 40% Oxisol + 20% rock powder); T7 (30% humus + 30% Oxisol + 40% rock powder); T8 (30% commercial substrate + 30% Oxisol + 40% rock powder); and T9 (30% vermicompost + 30% Oxisol + 40% rock powder). Initial plant development was influenced by the treatments; 20% powder and 40% nitrogen from humus (T4) produced seedlings with the greatest root, aerial part and total weight, in addition to greatest height and collar diameter. The data obtained indicate that aroeira develops better when in argillaceous substrates, with the addition of 40% humus and 20% rock powder, indicating the adequacy of this composition for its initial growth.

Highlights

An increase in overall consumption of agricultural inputs, together with growing concern with the environmental impacts caused by the indiscriminate use of fertilizers, has stimulated the search for alternative sources that allow full or partial replacement of conventional fertilizers (Silva et al 2012)
This study aimed to evaluate the initial growth of aroeira in Oxisol soil with the addition of different organic and organic/mineral substrates and rock powder
The addition of 20% and 40% powder led to a drop in the organic matter (OM) content, which would be expected, because with an increase in powder percentage, regardless of which organic substrate was used, there would be a reduction of OM

Summary

Introduction

An increase in overall consumption of agricultural inputs, together with growing concern with the environmental impacts caused by the indiscriminate use of fertilizers, has stimulated the search for alternative sources that allow full or partial replacement of conventional fertilizers (Silva et al 2012). There are other advantages, such as pH correction, the absence of soil salinization and excess potassium absorption, benefiting the absorption of calcium and magnesium, and a reduction of soluble phosphorus fixation by the presence of silica. This occurs because the powder is not readily soluble in water and not immediately leached by rainwater or intense irrigation. Due to the reduced volume of seedling containers and the nutrient leaching in nursery irrigation, cover fertilization is frequently necessary Such nutrient demand increases the cost of seedling production, but stimulates new research into alternative materials for fertilization and for substrate composition. On the other hand, Boroumand et al (2020), working with Nasturtium

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