02309naa a2200337 a 450000100080000000500110000800800410001902400490006010000170010924501480012626000090027452012730028365000230155665000230157965000210160265000220162365000290164565000130167465000200168765300260170765300220173365300270175570000170178270000230179970000170182270000240183970000200186370000230188370000230190677300420192921344972021-09-16       2021    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.3390/nitrogen20100062DOI1 aBIGHI, K. N.  aNitrogen pools in tropical plantations of N2-fixing and non-N2-fixing legume trees under different tree stand densities.h[electronic resource]  c2021  aWe 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.  aForest plantations  aForest restoration  aNitrogen balance  aNitrogen fixation  aFixação de Nitrogênio  aFloresta  aReflorestamento  a15N natural abundance  aFunctional traits  aN2 biological fixation1 aPAULA, R. R.1 aCALDEIRA, M. V. W.1 aBURAK, D. L.1 aMENDONÇA, E. de S.1 aSOUZA, P. H. de1 aDELARMELINA, W. M.1 aBALIEIRO, F. de C.  tNitrogengv. 2, n. 1, p. 86-98, 2021.