Plant growth and nutrient use efficiency of two native Fabaceae species for mineland revegetation in the eastern Amazon
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ORIGINAL PAPER
Plant growth and nutrient use efficiency of two native Fabaceae species for mineland revegetation in the eastern Amazon Silvio J. Ramos1 • Markus Gastauer1 • Simone K. Mitre1 • Cecı´lio F. Caldeira1 Joyce R. Silva1 • Antonio E. Furtini Neto1 • Guilherme Oliveira1 • Pedro W. M. Souza Filho1 • Jose´ O. Siqueira1,2
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Received: 22 February 2018 / Accepted: 19 October 2018 Northeast Forestry University 2019
Abstract The primary challenge of mineland revegetation is the establishment of species able to cope with low availability of nutrients, especially in steep slopes such as of mine pits. We evaluated plant growth response and nutrient use efficiency (NUE) of two promising native Fabaceae species (Dioclea apurensis—liana from metalliferous savannas; Bauhinia longipedicellata—tree from Amazon rainforest) from the Caraja´s Mineral Province, eastern Amazon-Brazil. Plants were grown separately in 2-kg pots filled with mining waste. Substrates were fertilized with nitrogen, phosphorus, potassium (NPK), lime, and micronutrients. The results showed increments on growth of both species when nutrients were applied to the mining waste. D. apurensis showed increases in leaf area, plant height, stem diameter, and shoot dry mass production when NPK or NPK ? micronutrients were applied, while B. longipedicelata was responsive to application of Project funding: This work was financially supported by the Instituto Tecnolo´gico Vale and Conselho Nacional de Desenvolvimento Cientı´fico e Tecnolo´gico (CNPq-Grant No. 456819/2014-2). SJR and GO are CNPq fellow (305831/2016-0 and 307479/2016-1). The online version is available at http://www.springerlink.com Corresponding editor: Yu Lei.
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11676-019-01004-w) contains supplementary material, which is available to authorized users. & Silvio J. Ramos [email protected] 1
Instituto Tecnolo´gico Vale, Rua Boaventura da Silva, 955, Bele´m 66055-090, Brazil
2
Departamento de Cieˆncia do Solo, Universidade Federal de Lavras, Lavras 37200-000, Brazil
NPK ? lime or NPK ? lime ? micronutrients. Further, D. apurensis showed higher NUE than B. longipedicelata, especially at the lowest doses of N, P and K. These findings may indicate a substantial advantage of D. apurensis for mineland revegetation, as this species may require lower nutrient inputs, being, therefore, a more sustainable way to revegetate degraded areas. Keywords Fertilizer application Mining soil Tropical forest Nutrient use efficiency
Introduction Revegetation is the most widely used technique in mines for controlling erosion, stabilizing the slopes of mine pits and waste piles, and sustaining the ecological equilibrium in the area (Jorgensen 1994). Notably, this becomes very challenging for mining areas that are acidic, depleted in organic matter, nutrients, and soil organisms (Candeias et al. 2014; Carvalho et al. 2017; Gastauer et al. 2018). Therefore, native species from nutrient impoverished, naturally acid
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