@article{fdi:010090765,
  title = {{A}ssessing nutrient safety net and crop yield in a {M}editerranean agroforestry using 15{N} labelling experiment},
  author = {{M}ahmud, {M}. and {B}ertrand, {I}. and {B}azot, {S}. and {D}elpierre, {N}. and {L}eadley, {P}. and {N}gao, {J}. and {M}arsden, {C}. and {D}ugu{\'e}, {R}{\'e}mi and {M}orfin, {A}. and {M}armagne, {A}. and {B}arthes, {L}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}his study aimed to assess crop yield and soil nitrogen removal by trees from a potential nitrogen leaching pool in {M}editerranean agroforestry, in a {N}-15-labeled fertilizer field experiment. {W}e hypothesized that the applied {N}-15 would be taken up by the trees, understorey vegetation strip ({UVS}), and soil microbial biomass, and that crop yield would be reduced in agroforestry systems. {I}n a two-block agroforestry design, {N}-15-labeled urea was applied to the crop-soil surface in agroforestry and monocrop plots. {W}e analyzed the {N}-15, nitrogen, and carbon contents of the aboveground and belowground compartments of the trees, crops, and {UVS}, as well as that of the soil microbial biomass. {N}o labelled {N}-15 was found in the trees, {UVS} and microbial biomass. {A}dditionally, agroforestry-crop yielded a -20% lower yield compared to monocrop. {T}he absence of {N}-15 uptake by trees was attributed to the tree age and rooting pattern, which resulted in the lack of tree roots in contact with the labelled fertilizer. {T}he absence of labelled {N}-15 in the microbial biomass indicated a preference for pre-existing organic matter over newly generated {N}-15 from urea mineralization. {T}he capacity of agroforestry systems on crop yield and potentially leachable nitrate may be influenced by the age of trees and prevailing environmental and management practices. {F}urther investigations after several years of tree growth are necessary to better understand the long-term effects of tree age on crop yield and the nutrient retention capacity, including the response pattern of nitrogen-fixing trees.},
  keywords = {{A}groforestry ; {R}obinia pseudoacacia {L}. ; {M}icrobial {B}iomass ; {B}iomass ; {P}artitioning ; {N}itrogen {A}llocation ; {N}-15 {L}abeling},
  booktitle = {},
  journal = {{J}ournal of {S}oil {S}cience and {P}lant {N}utrition},
  volume = {[{E}arly access]},
  numero = {},
  pages = {[12 p.]},
  ISSN = {0718-9508},
  year = {2024},
  DOI = {10.1007/s42729-024-01845-3},
  URL = {https://www.documentation.ird.fr/hor/fdi:010090765},
}