000			03463nam a2200529 a 4500
999			_c136439 _d136439
003			CR-TuBCO
005			20230430065113.0
007			ta
008			140917t2007 xxu||||| |||| 00| 0 eng d
022			_a0378-1127
040			_aCR-TuBCO _cCR-TuBCO _bspa
041			_aeng
100			_994513 _aMiranda Mello, Sergio Luis de _uCenter for Nuclear Energy in Agriculture, Piracicaba, SP, Brazil
245			_aPre- and post-harvest fine root growth in Eucalyptus grandis stands installed in sandy and loamy soils
260			_aÁmsterdam (Países Bajos) _bElsevier _c2007
300			_a10 páginas _b: 8 ilustraciones, 4 tablas
504			_aBibliografía páginas 194-195
520			_aInformation about fine root dynamics before and after harvest is scarce in eucalypt plantations. Knowledge of root system functioning is important to achieve sustainable production of these fast-growing species. This work evaluated fine root turnover in 9-year-old Eucalyptus grandis stands growing on a loamy soil (RED) and in a sandy soil (QTZ). On each soil type, the experimental area was divided into three plots that corresponded to the following time sequence: mature forest before harvesting (MF), after harvesting in summer (HS) and after harvesting in winter (HW). Fine roots (diameter < 3 mm) were sampled by sequential coring. Root length was obtained by imaging processing, distinguishing fine roots with diameter < 1 mm (FR1) and diameter between 1 and 3 mm (FR2). Fine root decomposition was estimated with litter bags incubated in three plots per soil. Root length density was higher for FR1 in QTZ than in RED for all plot types. There was a significant seasonal difference in FR1 density (FRD1) at a depth of 0–10 cm in RED (from 2.3 to 4.4 cm cm−3) and QTZ (from 5.7 to 8.2 cm cm−3), in winter and summer, respectively. Fine root dynamics was significantly altered after harvesting, mainly in the surface layer in both soils. An approx. 50% decrease in FRD1 was observed 60 days after harvesting in the two soil types. Root mass loss in litter bags was faster in RED than in QTZ. Decomposition of fine roots was faster after harvesting, which was directly related to altered environmental conditions (water availability, soil temperature).
650			_9147136 _aEUCALYPTUS GRANDIS
650			_9161770 _aRAICES
650			_9164772 _aSISTEMA RADICULAR
650			_9142595 _aCRECIMIENTO
650			_9142458 _aCOSECHA
650			_9166805 _aTIPOS DE SUELOS
650			_9154288 _aMEDICION
650			_9155109 _a MODELOS
650			_9145225 _aECUACIONES ALOMETRICAS
650		0	_9135462 _aALOMETRIA
650		0	_aAGRICULTURA _94
650		0	_9136468 _aARBOLES
650		0	_aROOTS _9163364
650		0	_9336847 _aROOT SYSTEMS
650		0	_aGROWTH _9149717
650		0	_9150021 _aHARVESTING
650		0	_9338972 _aSOIL TYPES
650		0	_aMEASUREMENT _9154228
650		0	_aMODELS _9327554
650		0	_aFORESTS _9148332
650		0	_aTREES _9167266
651			_92040 _aBRASIL
700			_996029 _aMoraes Goncalves, José Leonardo de _c autor/a _uDepartment of Forest Sciences, University of Sao Paulo, Brazil
700			_971145 _aGava, José Luiz _c autor/a _uCia. Suzano of Cellulose and Paper, Brazil
830			_aForest Ecology and Management _nnúmero 2-3 _pJulio _ppáginas 186-195 _vVolumen 246, (2007)
856			_qpdf _uhttp://orton.catie.ac.cr/repdoc/A11431i/A11431i.pdf
942			_cANA _2z