Nitrogen Use Efficiency in an Agrisilviculture System with Gliricidia sepium in the Cerrado Region

Gliricidia ( ) 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 g...

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Bibliographic Details
Published in:Plants (Basel) 2023-04, Vol.12 (8), p.1647
Main Authors: Figueiredo, Cícero Célio de, Moreira, Túlio Nascimento, Coser, Thais Rodrigues, Silva, Letícia Pereira da, Leite, Gilberto Gonçalves, de Carvalho, Arminda Moreira, Malaquias, Juaci Vitória, Marchão, Robélio Leandro, Urquiaga, Segundo
Format: Article
Language:English
Subjects:
agroforestry system
Biomass
Competition
Corn
Crops
Cycles
Efficiency
Fertilizers
Gliricidia sepium
Grain
Hydroxyapatite
integrated crop–livestock–forest system
Legumes
Livestock
low-carbon emission agriculture
Nitrogen
Nutrients
Planting density
Recovery
Soil fertility
Streets
sustainable intensification
Trees
Tropical environment
Tropical environments
Zea mays
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Summary:Gliricidia ( ) 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 , with a fixed spacing of 5 m between the alleys. The efficiency of N use was investigated by using the N isotope tracer. In each plot, a transect perpendicular to the tree rows was established in two positions: (i) in the corn ( ) 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 to 89% with 1000 plants ha . The effect of gliricidia on the N uptake by corn was higher in the central position of the alley with 1000 plants ha . The agrisilvicultural system with 1000 plants ha was highly efficient in the recovery of mineral N, representing an excellent option for integrated production systems in tropical regions.
ISSN:2223-7747
2223-7747
DOI:10.3390/plants12081647