Abstract
Forest restoration has the premise of restoring degraded native vegetation to conditions prior to degradation. The objective of this work was to evaluate the production of seedlings of a native species from the Amazon biome (Euterpe oleracea) under different substrates. The experiment was carried out at the Federal University of Tocantins, using a completely randomized design, and a 5x 4 factorial scheme, with five substrates (babassu stem + soil, babassu stem + rice husk + soil, coconut fiber + soil, babassu stem + fiber coconut + rice husk + soil, commercial substrate + soil - control), four trial periods (50, 100, 150 and 200 days). The evaluated variables: plant height, stem diameter, shoot dry matter, root dry matter, total dry matter, seedling quality index, leaf area and absolute growth rate. The growth of assai seedlings was influenced by the different substrates, until the 150 days after transplanting the quality and development of the seedlings were the same, both for the treatments that used commercial substrate and for the treatments that used renewable materials in their composition. The treatment using babassu stem (T1) obtained better shoot dry matter, total dry matter and seedling quality index values, in addition to being a material found in abundance in the regions, making this treatment the most viable and recommended for the production of assai seedlings.
Highlights
IntroductionGlobal agricultural production has increased significantly in recent years and the anthropogenic conversion of natural environments for human use, which modify and transform a large proportion of the planet’s land surface (Foley et al, 2011), bringing short- and long-term environmental implications (Lambin & Meyfroidt, 2011), is inherent to this.In Brazil, it is essential to consider the implications arising from this conversion in the Cerrado biome, which covers about 204 million hectares (approximately 24% of the Brazilian territory) and is home to 12,070 species of important land plants, in addition to containing the springs of the three largest river basins in South America in its territorial space, which contribute considerably to the water resources of the country’s river basins (Forzza et al, 2015).The Cerrado has undergone large-scale changes in recent decades, mainly in relation to the ecosystem function and use; the severity and consequences of these changes are less prominent on the national scene than those that occurred in the Amazon (Sawyer, 2008; Janssen, Rutz, 2011; Hunke et al, 2014)
In areas deforested until July 2008, regularization can be done through recovery or compensation (Azevedo, Stabile, Reis, 2015; Brasil, 2012a)
The materials used in the composition of the substrates are considered by-products, and are destined for burning, or for inappropriate disposal by the local population, namely fresh rice husks, coconut fiber and decomposed babassu stem (Attalea speciosa)
Summary
Global agricultural production has increased significantly in recent years and the anthropogenic conversion of natural environments for human use, which modify and transform a large proportion of the planet’s land surface (Foley et al, 2011), bringing short- and long-term environmental implications (Lambin & Meyfroidt, 2011), is inherent to this.In Brazil, it is essential to consider the implications arising from this conversion in the Cerrado biome, which covers about 204 million hectares (approximately 24% of the Brazilian territory) and is home to 12,070 species of important land plants, in addition to containing the springs of the three largest river basins in South America in its territorial space, which contribute considerably to the water resources of the country’s river basins (Forzza et al, 2015).The Cerrado has undergone large-scale changes in recent decades, mainly in relation to the ecosystem function and use; the severity and consequences of these changes are less prominent on the national scene than those that occurred in the Amazon (Sawyer, 2008; Janssen, Rutz, 2011; Hunke et al, 2014). Global agricultural production has increased significantly in recent years and the anthropogenic conversion of natural environments for human use, which modify and transform a large proportion of the planet’s land surface (Foley et al, 2011), bringing short- and long-term environmental implications (Lambin & Meyfroidt, 2011), is inherent to this. In Brazil, it is essential to consider the implications arising from this conversion in the Cerrado biome, which covers about 204 million hectares (approximately 24% of the Brazilian territory) and is home to 12,070 species of important land plants, in addition to containing the springs of the three largest river basins in South America in its territorial space, which contribute considerably to the water resources of the country’s river basins (Forzza et al, 2015). In areas deforested until July 2008, regularization can be done through recovery (either directed or natural, that is, natural recomposition or regeneration) or compensation (Azevedo, Stabile, Reis, 2015; Brasil, 2012a)
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