Abstract
Abstract It is essential to know the ecological tolerance of Anadenanthera peregrina (L.) Speg seedlings regarding the light and edaphic conditions. The aim of this study was to evaluate the effect of substrates and shading levels on the emergence and quality of A. peregrina seedlings. The seeding was done in two substrates: 100% Dystroferric Red Latosol (DRL) and DRL + commercial substrate (1:1, v/v). The species were kept under four shading levels: 0% (direct sunlight), 30%, 50% and 70%. The highest speed and shortest emergence time of A. peregrina occurred in DRL. The highest growth characteristics of aerial part, xylopodium and roots occurred under direct sunlight and DRL. The productions of fresh and dried masses of different vegetative organs, physiological and Dickson quality index were higher in DRL and direct sunlight. The A. peregrina seedlings in 100% of DRL and direct sunlight showed more viable morphophysiological and quality indicators for their production.
Highlights
Introduction and objectiveAmong the native species found in the Brazilian Cerrado, it can be noted that the species Anadenanthera peregrina (L.) Speg., known as “Angico preto”, belongs to the Fabaceae family and it has biological nitrogen fixation potential and it is a significant option to be inserted in areas for forest recomposition (Souza et al, 2012) or agroforestry systems
The rate of speed and Mean Emergence Time (MET) of A. peregrina seedlings was influenced by the substrates (p
The Ratio of Height to Diameter (RHD) was influenced by the factors, days after seeding, shading (Figure 3a) and substrates (Figure 3b), and the highest values occurred in seedlings exposed to direct sunlight, followed by those under 70% shade, both at 150 Days After Seeding (DAS)
Summary
Among the native species found in the Brazilian Cerrado, it can be noted that the species Anadenanthera peregrina (L.) Speg., known as “Angico preto”, belongs to the Fabaceae family and it has biological nitrogen fixation potential and it is a significant option to be inserted in areas for forest recomposition (Souza et al, 2012) or agroforestry systems. The light availability is one of the environmental conditions that influence the establishment of tree species in the Cerrado physiognomies (Pinheiro & Monteiro, 2010). This way, the exposure of plants to different light conditions may vary depending on the species and its successional degree. The species may present adaptive mechanisms based on adjustments of their photosynthetic apparatus, in order to use light more efficiently (Ruban, 2015; Carvalho & Castilho, 2018)
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