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

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.

Effects of Shading on Anatomical Aspects and Chlorophyll and Carotenoid Contents in Paricá

“…In Brazil, paricá is found in the states of Amazonas, Pará, Mato Grosso, and Rondônia. Paricá grows rapidly and can reach a height of about 30 m (Epifanio et al, 2022) with great potential use in reforestation and recovery of degraded areas (Binotti et al, 2019;Sousa et al, 2022).…”

“…The morphological characteristics of the leaf surface established the amount of light absorbed or reflected. Studies have shown the positive effect of shading on the morphophysiological aspects in some forest species, such as eucalyptus and paricá (Sousa et al, 2022).…”