Título:	Nitrogen use efficiency in an agrisilviculture system with gliricidia sepium in the Cerrado Region
Autor(es):	Figueiredo, Cícero Célio de Moreira, Túlio Nascimento Coser, Thais Rodrigues Silva, Letícia Pereira da Leite, Gilberto Gonçalves Carvalho, Arminda Moreira de Malaquias, Juaci Vitória Marchão, Robélio Leandro Urquiaga, Segundo
ORCID:	https://orcid.org/0000-0002-7496-0261 https://orcid.org/0000-0003-1922-7929
Afiliação do autor:	University of Brasília, Faculty of Agronomy and Veterinary Medicine University of Brasília, Faculty of Agronomy and Veterinary Medicine University of Brasília, Faculty of Agronomy and Veterinary Medicine University of Brasília, Faculty of Agronomy and Veterinary Medicine University of Brasília, Faculty of Agronomy and Veterinary Medicine Embrapa Cerrados Embrapa Cerrados Embrapa Cerrados Embrapa Agrobiologia
Assunto:	Sistema agroflorestal Gliricídia Adubação nitrogenada
Data de publicação:	14-Abr-2023
Editora:	MDPI
Referência:	FIGUEIREDO, Cícero Célio de et al. Nitrogen use efficiency in an agrisilviculture system with gliricidia sepium in the Cerrado Region, Plants, [S.l.], v. 12, 1647, 2023. DOI: https://doi.org/10.3390/plants12081647. Disponível em: https://www.mdpi.com/2223-7747/12/8/1647. Acesso em: 23 out. 2023.
Abstract:	Gliricidia (Gliricidia sepium) is a tree legume that has great potential for use in agriculture because of its multiple-use characteristics. However, there is little information in the literature about the effect of agrisilvicultural systems on nitrogen (N) cycling. This study evaluated the effect of densities of gliricidia on N cycling under an agrisilvicultural system. The treatments were composed of different densities of gliricidia: 667, 1000 and 1333 plants ha−1, with a fixed spacing of 5 m between the alleys. The efficiency of N use was investigated by using the 15N isotope tracer. In each plot, a transect perpendicular to the tree rows was established in two positions: (i) in the corn (Zea mays) row adjacent to the trees, and (ii) in the corn row in the center of the alley. The N fertilizer recovery efficiency ranged from 39% in the density of 667 plants ha−1 to 89% with 1000 plants ha−1. The effect of gliricidia on the N uptake by corn was higher in the central position of the alley with 1000 plants ha−1. The agrisilvicultural system with 1000 plants ha−1 was highly efficient in the recovery of mineral N, representing an excellent option for integrated production systems in tropical regions.
Unidade Acadêmica:	Faculdade de Agronomia e Medicina Veterinária (FAV)
Licença:	Copyright: © 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/).
DOI:	https://doi.org/10.3390/plants12081647
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