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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
03/07/1997 |
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Data da última atualização: |
31/03/2017 |
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Autoria: |
PARTON, W. J.; SCURLOCK, J. M. O.; OJIMA, D. S.; GILMANOV, T. G.; SCHOLES, R. J.; SCHIMEL, D. S.; KIRCHNER, T.; MEANUT, J. C.; SEASTEDT, T.; GARCIA MOYA, E.; KAMNALRUT, A.; KINYAMARIO, J. I. |
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Título: |
Observations and modeling of biomass and soil organic matter dynamics for the grassland biome worldwide. |
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Ano de publicação: |
1993 |
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Fonte/Imprenta: |
Global Biogeochemical Cycles, v.7, n.4, p.785-809, Dec. 1993. |
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Idioma: |
Inglês |
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Conteúdo: |
Century is a model of terrestrial biogeochemistry based on relationships between climate, human management (fire, grazing), soil properties, plant productivity and decomposition. The grassland version of the Century model was tested using observed data from 11 temperate and tropical grassland around the world. The results show that soil C and N levels can be simulated to whithin +- 25% of the observed values (100 and 75% of the time, respectively) for a diverse set of soils. Peak live biomass and plant production can be simulated within +- 25% of the observed values (57 and 60% of the time, respectively) for burned, fertilized, and irrigated grassland sites where precipitation ranged from 22 to over 150 cm. Live biomass can be generally predicted to within +- 50% of the observed values (57% of the time). The model underestimated the live biomass in extremely high plant production years at two of the Russin sites. A comparison of Century model results with statistical models showed that the Century model had slightly higher r2 values than the statistical models. Data and calibrated model results from this study are useful for analysis and description of grassland carbon dynamics, and as a reference point for testing more physiologically based models prediction's of net primary production and biomass. Results indicate that prediction of plant and soil organic matter (C and N) dynamics requires knowledge of climate, soil texture, and N inputs. |
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Palavras-Chave: |
Century model; Grassland; Modelagem; Modeling. |
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Thesagro: |
Biomassa; Matéria Orgânica; Pastagem; Solo. |
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Thesaurus Nal: |
biomass; organic matter; soil. |
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Categoria do assunto: |
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Marc: |
LEADER 02484naa a2200385 a 4500
001 1791272
005 2017-03-31
008 1993 bl --- 0-- u #d
100 1 $aPARTON, W. J.
245 $aObservations and modeling of biomass and soil organic matter dynamics for the grassland biome worldwide.
260 $c1993
520 $aCentury is a model of terrestrial biogeochemistry based on relationships between climate, human management (fire, grazing), soil properties, plant productivity and decomposition. The grassland version of the Century model was tested using observed data from 11 temperate and tropical grassland around the world. The results show that soil C and N levels can be simulated to whithin +- 25% of the observed values (100 and 75% of the time, respectively) for a diverse set of soils. Peak live biomass and plant production can be simulated within +- 25% of the observed values (57 and 60% of the time, respectively) for burned, fertilized, and irrigated grassland sites where precipitation ranged from 22 to over 150 cm. Live biomass can be generally predicted to within +- 50% of the observed values (57% of the time). The model underestimated the live biomass in extremely high plant production years at two of the Russin sites. A comparison of Century model results with statistical models showed that the Century model had slightly higher r2 values than the statistical models. Data and calibrated model results from this study are useful for analysis and description of grassland carbon dynamics, and as a reference point for testing more physiologically based models prediction's of net primary production and biomass. Results indicate that prediction of plant and soil organic matter (C and N) dynamics requires knowledge of climate, soil texture, and N inputs.
650 $abiomass
650 $aorganic matter
650 $asoil
650 $aBiomassa
650 $aMatéria Orgânica
650 $aPastagem
650 $aSolo
653 $aCentury model
653 $aGrassland
653 $aModelagem
653 $aModeling
700 1 $aSCURLOCK, J. M. O.
700 1 $aOJIMA, D. S.
700 1 $aGILMANOV, T. G.
700 1 $aSCHOLES, R. J.
700 1 $aSCHIMEL, D. S.
700 1 $aKIRCHNER, T.
700 1 $aMEANUT, J. C.
700 1 $aSEASTEDT, T.
700 1 $aGARCIA MOYA, E.
700 1 $aKAMNALRUT, A.
700 1 $aKINYAMARIO, J. I.
773 $tGlobal Biogeochemical Cycles$gv.7, n.4, p.785-809, Dec. 1993.
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Registro original: |
Embrapa Pantanal (CPAP) |
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