Controlled-release Fertilizer in the Production and Quality of Acacia mangium Seedlings

Lazara Daniela Dias Silva,Geislaine Ferreira Paniago,Ana Paula Leite Lima,Rogério Costa Silva,Sebastião Ferreira De Lima

doi:10.1590/2179-8087.020917

Lazara Daniela Dias Silva, Geislaine Ferreira Paniago + Show 3 more

Open Access

https://doi.org/10.1590/2179-8087.020917

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Abstract

ABSTRACT In order to evaluate the use of controlled-release fertilizer in the production and quality of Acacia mangium seedlings, this experiment was conducted in randomized blocks, and treatments consisted of five levels (0, 2.5, 5.0, 7.5 and 10.0 kg m–3 of substrate) of Osmocote Plus® in six replicates. After 130 days of sowing, the production and quality variables of Acacia seedlings were analyzed. All production and quality variables, height/shoot ratio (HSH) and Dickson quality index (DQI) were influenced by the fertilizer doses. The greatest mean values of stem diameter, total height, shoot dry mass, root dry mass, the best HSH and the highest DQI, were obtained for doses ranging from 7.1 to 7.8 kg m–3 of substrate. The largest leaf area was obtained using a dose of 9.3 kg m–3 of substrate.

Highlights

For the Brazilian economy, the increasing consumption of wood from planted forests represents a productive potential that mitigates the pressure exerted on native forests
The experiment was installed in September 2014 at the Federal University of Mato Grosso do Sul (UFMS) on the Campus of Chapadão do Sul, MS, Brazil, in a Controlled-release Fertilizer... 3/7 greenhouse with lateral sombrite coating (50%) and humidity controlled by a micro sprinkler irrigation system
Increasing doses of controlled-release fertilizer provided significant increases in stem diameter, total height, leaf area, root dry weight and shoot dry weight compared to the unfertilized A. mangium seedlings

Summary

Introduction

For the Brazilian economy, the increasing consumption of wood from planted forests represents a productive potential that mitigates the pressure exerted on native forests. Other exotic species of great productive ability are limited to the little available information regarding the production of seedlings and some silvicultural aspects. This lack of information is because of its recent introduction to the country, in comparison to the aforementioned species, such as the Acacia mangium species (Tonini et al, 2010). Brazil has approximately 160 thousand hectares of area planted with the Acacia genus (IBA, 2016). More than 25 thousand hectares are planted with A. mangium in savanna areas of Roraima, with a high prospective for commercially expanding its plantations (Barros et al, 2009). Investments in genetic improvement, nutritional research and improvement in the productive system are necessary so that the formed forest stands express the true productive capacity of the species and the site

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