000			03934nam a2200589 a 4500
999			_c136407 _d136407
003			CR-TuBCO
005			20230430065111.0
007			ta
008			140703t2008 xxu||||| |||| 00| 0 eng d
022			_a0378-1127
040			_aCR-TuBCO _cCR-TuBCO _bspa
041			_aeng
100			_950447 _aBouillet, J.P. _uCIRAD, Montpellier (Francia)
245			_aMixed-species plantations of Acacia mangium and Eucalyptus grandis in Brazil _b: 2 Nitrogen accumulation in the stands and biological N2 fixation
260			_aAmsterdam _bElsevier _c2008
270			_aSan José, C.R.
300			_a13 páginas _b 2 ilustraciones, 7 tablas
504			_aBibliografía páginas 3929-3930
520			_aThe sustainability of plantation forests is closely dependent on soil nitrogen availability in short-rotation forests established on low-fertility soils. N2 fixation by A. mangium was quantified in 100A:0E and 50A:100E at age 18 and 30 months by the 15N natural abundance method and in 50A:100E at age 30 months by the 15N dilution method. The consistency of results obtained by isotopic methods was checked against observations of nodulation, Specific Acetylene Reduction Activity (SARA), as well as the dynamics of N accumulation within both species. At age 18 months, higher δ15N values found in A. mangium tree components than in E. grandis components prevented reliable estimations of the percentage of N derived from atmospheric fixation (%Ndfa). At age 30 months, %Ndfa estimated by natural abundance and by 15N dilution amounted to 10–20 and 60%, respectively. The amount of N derived from N2 fixation in the standing biomass was estimated at 62 kg N ha−1 in 100A:0E and 3 kg N ha−1 in 50A:100E by the 15N natural abundance method, and 16 kg N ha−1 in 50A:100E by the 15N dilution method. The total amount of atmospheric N2 fixed since planting was estimated at 66 kg N ha−1 in 100A:0E and 7 kg N ha−1 in 50A:100E by the 15N natural abundance method, and 31 kg N ha−1 in 50A:100E by the 15N dilution method. The most reliable estimation of N2 fixation was likely to be achieved using the 15N dilution method and sampling the whole plant.
650			_9134018 _aACACIA MANGIUM
650			_9147136 _aEUCALYPTUS GRANDIS
650			_9158993 _aPLANTACION FORESTAL
650			_9147945 _aFIJACION DEL NITROGENO
650			_9135397 _aALMACENAMIENTO
650			_9137963 _aBIOMASA
650			_9154288 _aMEDICION
650			_9155109 _a MODELOS
650			_9145225 _aECUACIONES ALOMETRICAS
650		0	_9135462 _aALOMETRIA
650		0	_aAGRICULTURA _94
650		0	_aFOREST PLANTATIONS _9319603
650		0	_aNITROGEN _9156032
650		0	_aSTORAGE _9165411
650		0	_aBIOMASS _9137969
650		0	_aMEASUREMENT _9154228
650		0	_aMODELS _9327554
650		0	_aFORESTS _9148332
651			_92040 _aBRASIL
700			_984504 _aLaclau, J.P. _c (autor/a) _uCIRAD, Montpellier (Francia)
700			_972397 _aGoncalves, J.L.M. _c (autor/a) _uUSP, Piracicaba, Brazil
700			_996450 _aMoreira, Marcelo Z. _c (autor/a) _uCentro de Energía Nuclear na Agrícultura, Piracicaba, Brazil
700			_9125571 _aTrivelin, P.C.O. _c (autor/a) _uCentro de Energía Nuclear na Agrícultura, Piracicaba, Brazil
700			_981746 _aJourdan, C. _c (autor/a) _uCIRAD, Montpellier (Francia)
700			_9119035 _aSilva, E.V. _c (autor/a) _uUSP, Piracicaba, Brazil
700			_9105142 _aPiccolo, M.C. _c (autor/a) _uCentro de Energía Nuclear na Agrícultura, Piracicaba, Brazil
700			_9125720 _aTsai, S.M. _c (autor/a) _uCentro de Energía Nuclear na Agrícultura, Piracicaba, Brazil
700			_969801 _aGaliana, A. _c (autor/a) _uUMR LSTM, Montpellier, France
830			_aForest Ecology and Management _nnúmero 12 _pJunio _ppáginas 3918-3930 _vVolumen 255
856			_uhttps://www.sciencedirect.com/science/article/abs/pii/S0378112707008420 _qpdf _yeng
942			_cANA _2ddc