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Abstract
ABSTRACT Efficient forest species can be indicated for reforesting environments, which present nutritional restriction. The objective of this study was to determine the nutrient stock in leaf biomass of the species of greatest importance value (IV) in a tropical dry forest fragment, as well as to evaluate the nutritional efficiency of these species as reforestation indicators. A phytosociological study of the woody species was carried out defining the ten species with the greatest IV. Three individuals of each species were selected and sampled, with 25 leaves being collected from the middle part of the crown of each individual. The N, P, K, Ca and Mg contents were determined in these leaves and the leaf biomass was estimated by an allometric equation, calculating the stock of these nutrients and the nutritional efficiency of the species. The Schinopsis brasiliensis and Mimosa tenuiflora species can be recommended in environments with restricted P availability, and Spondias tuberosa can additionally be indicated to populate areas with low levels of K and Mg in the soil. Differences in the nutritional efficiency of the species can be attributed to the differences in the absorption and translocation capacity, as well as the utilization of these nutrients.
Highlights
Plant species are directly related to the soil, seeking to find the necessary equilibrium for their establishment, which interferes with species diversity (Silva et al, 2017)
The nutritional efficiency of plant species expressed by leaf biomass production is determined by the relationship between this biomass and its nutrient stock
The nutritional efficiency of the species evaluated by the leaf biomass production is more adequate than an evaluation through the production of stems and branches, mainly for nutrient cycling studies (Albuquerque et al, 2018)
Summary
Plant species are directly related to the soil, seeking to find the necessary equilibrium for their establishment, which interferes with species diversity (Silva et al, 2017). Knowledge of the nutritional relations between plants and soil is fundamental, especially in environments with water restriction, as in dry tropical forests. The nutritional efficiency of plant species expressed by leaf biomass production is determined by the relationship between this biomass and its nutrient stock. The nutritional efficiency of the species evaluated by the leaf biomass production is more adequate than an evaluation through the production of stems and branches, mainly for nutrient cycling studies (Albuquerque et al, 2018). According to Vitousek & Sanford (1986), the mineral nutrient content in leaf tissues may reflect the soil’s fertility, being useful to compare the nutritional condition of different areas. Medeiros et al (2008) stated that only knowing the soil’s fertility is insufficient for adequate monitoring of the nutritional state of plants According to Vitousek & Sanford (1986), the mineral nutrient content in leaf tissues may reflect the soil’s fertility, being useful to compare the nutritional condition of different areas. Medeiros et al (2008) stated that only knowing the soil’s fertility is insufficient for adequate monitoring of the nutritional state of plants
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