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Article

Nitrogen Pools in Tropical Plantations of N2-Fixing and Non-N2-Fixing Legume Trees under Different Tree Stand Densities

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Centro de Ciências Agrárias e Engenharias, Departamento de Ciências Florestais e da Madeira, Programa de Pós-Graduação em Ciências Florestais, Universidade Federal do Espírito Santo, Jerônimo Monteiro 29550-000, Brazil
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Centro de Ciências Agrárias e Engenharias, Departamento de Agronomia, Programa de Pós-Graduação em Produção Vegetal, Universidade Federal do Espírito Santo, Alegre 29500-000, Brazil
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Departamento Acadêmico de Agricultura e Ambiente, Instituto Federal de Educação, Ciência e Tecnologia do Sudeste de Minas Gerais, Rio Pomba 36180-000, Brazil
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Coordenadoria do Curso Técnico em Florestas, Instituto Federal de Educação, Ciência e Tecnologia do Espírito Santo, Ibatiba 29395-000, Brazil
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Embrapa Solos, Rio de Janeiro 05407-002, Brazil
*
Author to whom correspondence should be addressed.
Academic Editor: Jim Moir
Received: 19 January 2021 / Revised: 3 March 2021 / Accepted: 8 March 2021 / Published: 15 March 2021
We investigated the nitrogen pools in monocultures of legume species widely used in reforestation in Brazil that have contrasting growth and nitrogen acquisition strategies. The plantations were established with the slow-growing and N2-fixing tree Anadenanthera peregrina var. peregrina, and the fast-growing and non-fixing tree Schizolobium parahyba var. amazonicum. The measurements of N pools in the tree biomass and the soil followed standard methods and were carried out on 54 experimental plots. The N2 fixation pools were evaluated by abundance natural of 15N and the N accretion methods. The soil N content was of similar magnitude between species and stand densities. The species showed similar amounts of N in the biomass, but divergent patterns of N accumulation, as well as the 15N signature on the leaves. S. parahyba accumulated most N in the stem, while A. peregrina accumulated N in the roots and leaves. However, the N accumulation in biomass of A. peregrina stand was less constrained by environment than in S. parahyba stands. The percentage of N derived from N2 fixation in A. peregrina stands decreased with the increase of stand density. The biological N2 fixation estimates depended on the method and the response of tree species to environment. View Full-Text
Keywords: forest plantation; forest restoration; N2 biological fixation; functional traits; 15N natural abundance; N balance forest plantation; forest restoration; N2 biological fixation; functional traits; 15N natural abundance; N balance
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MDPI and ACS Style

Bighi, K.N.; Paula, R.R.; Caldeira, M.V.W.; Burak, D.L.; Mendonça, E.d.S.; de Souza, P.H.; Delarmelina, W.M.; Balieiro, F.d.C. Nitrogen Pools in Tropical Plantations of N2-Fixing and Non-N2-Fixing Legume Trees under Different Tree Stand Densities. Nitrogen 2021, 2, 86-98. https://0-doi-org.brum.beds.ac.uk/10.3390/nitrogen2010006

AMA Style

Bighi KN, Paula RR, Caldeira MVW, Burak DL, Mendonça EdS, de Souza PH, Delarmelina WM, Balieiro FdC. Nitrogen Pools in Tropical Plantations of N2-Fixing and Non-N2-Fixing Legume Trees under Different Tree Stand Densities. Nitrogen. 2021; 2(1):86-98. https://0-doi-org.brum.beds.ac.uk/10.3390/nitrogen2010006

Chicago/Turabian Style

Bighi, Kelly N., Ranieri R. Paula, Marcos V.W. Caldeira, Diego L. Burak, Eduardo d.S. Mendonça, Paulo H. de Souza, William M. Delarmelina, and Fabiano d.C. Balieiro 2021. "Nitrogen Pools in Tropical Plantations of N2-Fixing and Non-N2-Fixing Legume Trees under Different Tree Stand Densities" Nitrogen 2, no. 1: 86-98. https://0-doi-org.brum.beds.ac.uk/10.3390/nitrogen2010006

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