Morphophysiological Evaluation of Schizolobium Parahyba Var. Amazonicum and Eucalyptus urograndis Growing in Different Levels of Shading

Hygor Gomes De Almeida Sousa,Gabriella Rayssa Antunes Da Silva Oliveira,Bruno Aurélio Campos Aguiar,Valéria Cardoso Lopes,Priscila Bezerra Souza,Igor Viana Souza,Flávia Bezerra Souza,Maristela Lima Figueiredo Guimarães Epifânio

doi:10.1590/2179-8087-floram-2021-0054

Hygor Gomes De Almeida Sousa, Gabriella Rayssa Antunes Da Silva Oliveira + Show 6 more

Open Access

https://doi.org/10.1590/2179-8087-floram-2021-0054

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Abstract

This study aimed to identify the best shade level for the growth of Schizolobium parabyba var. amazonicum and Eucalyptus urograndis seedlings to obtain more resilient seedlings with higher quality. We used an entirely randomized design was used, in a 2 x 4-factor scheme, with two species and four levels of shading, comprising 5 repetitions and 6 plants per repetition, totaling 30 plants per treatment. The four shading levels were characterized as follows: T1 (full sun), T2 (50%-shading screen), T3 (plastic), T4 (50%-shading screen plus wool blanket). For the production of Eucalyptus urograndis seedlings, it is recommended an unshaded environment, since one variable showed a significant difference. For the Schizolobium parahyba var. amazonicum species, it is suggested to produce it under shade, where is was achived (50% together with the wool blanket), better results for the most variables.

Highlights

AND OBJECTIVESEspecially in the last decades, there has been progress in Brazilian forestry concerning forest improvement, cultural treatments, especially for the exploitation of wood with fast growth and annual increment (Malagi, 2015).The Brazilian forestry sector has shown good numbers of planted forests, leading the country to the spotlight of the international scenario, with a total of 7.83 million ha in 2018, practically stable when compared to 2017
This study aimed to identify the best shade level for the growth of Schizolobium parabyba var. amazonicum and Eucalyptus urograndis seedlings to obtain more resilient seedlings with higher quality
Santos et al (2019), worked with Enterolobium contortisiliquum (Vell.) Morong seedlings at different shading levels (0, 30, 50 and 70%), and found that the shaded environment offered better results, which corroborates with the results found in the present study

Summary

Introduction

The Brazilian forestry sector has shown good numbers of planted forests, leading the country to the spotlight of the international scenario, with a total of 7.83 million ha in 2018, practically stable when compared to 2017. When compared to other conventional species, it can be 15% higher than conventional species This hybrid is adapted to most regions of the country, except for the south, since it is considered sensitive to severe frost (Bentec, 2020). In this sense, the Eucalyptus urograndis is quite cultivated in Brazil mainly for adapting to different climatic conditions and being quite resistant to many diseases (Cardoso et al, 2019)

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