Abstract
Efficiency of Biological Utilization of Micronutrients by Forests Species in Hypoxerophytic Caatinga
Highlights
The relationships between vegetation and soil in hypoxerophytic Caatinga are more dynamic due to the addition of residues from the livestock activity to the environment and due to greater water availability from small intermittent streams (Deusdará et al, 2017)
Nutrient availability is influenced mainly by soil pH, and the cationic micronutrients Cu, Fe, Zn, and Mn have their availability reduced when the soil is low acid, tending to neutral or alkaline (Biondi et al, 2011). This low availability of micronutrients in the soil can limit the development of plant species and, interfere in the biomass production and even in the natural regeneration of species in the Caatinga
This study aimed to determine the concentrations of Cu, Fe, Zn, and Mn, estimate the leaf biomass, and calculate the efficiency of use of the nutrients in ten species of great importance value in a hypoxerophytic Caatinga fragment, aiming to contribute to a more adequate choice of species in reforestation programs in the Caatinga in Brazil
Summary
The relationships between vegetation and soil in hypoxerophytic Caatinga are more dynamic due to the addition of residues from the livestock activity to the environment and due to greater water availability from small intermittent streams (Deusdará et al, 2017). The winter season allows a higher N cycling and promotes the growth of exuberant vegetation with high biomass production Such vegetation requires a greater amount of nutrients from the soil. The soils of hypoxerophytic Caatinga are deeper and more fertile due to the higher humidity of the environment They are low acid, neutral or alkaline soils, because of a low removal of basic cations such as Ca, Mg and K. Nutrient availability is influenced mainly by soil pH, and the cationic micronutrients Cu, Fe, Zn, and Mn have their availability reduced when the soil is low acid, tending to neutral or alkaline (Biondi et al, 2011) This low availability of micronutrients in the soil can limit the development of plant species and, interfere in the biomass production and even in the natural regeneration of species in the Caatinga
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