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Registro Completo |
Biblioteca(s): |
Embrapa Florestas. |
Data corrente: |
09/12/2014 |
Data da última atualização: |
04/11/2016 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
SALIS, S. M. de; LEHN, C. R.; MATTOS, P. P. de; BERGIER, I.; CRISPIM, S. M. A. |
Afiliação: |
SUZANA MARIA DE SALIS, CPAP; CARLOS R. LEHN, Instituto Federal de Educação Ciência e Tecnologia Farroupilha; PATRICIA POVOA DE MATTOS, CNPF; IVAN BERGIER TAVARES DE LIMA, CPAP; SANDRA MARA ARAUJO CRISPIM, CPAP. |
Título: |
Root behavior of savanna species in Brazil's Pantanal wetland. |
Ano de publicação: |
2014 |
Fonte/Imprenta: |
Global Ecology and Conservation, v. 2, p. 378-384, Dec. 2014. |
DOI: |
http://dx.doi.org/10.1016/j.gecco.2014.10.009 |
Idioma: |
Inglês |
Conteúdo: |
The objective of this study was to determine the maximum depth, structure, diameter and
biomass of the roots of common woody species in two savanna physiognomies (savanna
woodland and open woody savanna) in Brazil?s Pantanal wetland. The root systems of 37
trees and 34 shrubs of 15 savanna species were excavated to measure their length and
depth and estimate the total root biomass through allometric relationships with stem
diameter at ground level. In general, statistical regression models between root weight and
stem diameter at ground level showed a significance of P < 0.05 and R2 values close to or
above 0.8. The average depths of the root system in wetland savanna woodland and open
woody savanna are 0.8 ± 0.3 m and 0.7 ± 0.2 m, respectively, and differ from the root
systems of savanna woody species in non-flooding areas, whose depth usually ranges from
3 to 19 m.Weattribute this difference to the adaptation of woody plant to the shallow water
table, particularly during the wet season. This singularity of woody species in wetland
savannas is important when considering biomass and carbon stocks for national and global
carbon inventories. |
Palavras-Chave: |
Comportamento; Equação alométrica. |
Thesagro: |
Biomassa; Diâmetro; Raiz. |
Thesaurus Nal: |
Pantanal. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01888naa a2200253 a 4500 001 2002041 005 2016-11-04 008 2014 bl --- 0-- u #d 024 7 $ahttp://dx.doi.org/10.1016/j.gecco.2014.10.009$2DOI 100 1 $aSALIS, S. M. de 245 $aRoot behavior of savanna species in Brazil's Pantanal wetland.$h[electronic resource] 260 $c2014 520 $aThe objective of this study was to determine the maximum depth, structure, diameter and biomass of the roots of common woody species in two savanna physiognomies (savanna woodland and open woody savanna) in Brazil?s Pantanal wetland. The root systems of 37 trees and 34 shrubs of 15 savanna species were excavated to measure their length and depth and estimate the total root biomass through allometric relationships with stem diameter at ground level. In general, statistical regression models between root weight and stem diameter at ground level showed a significance of P < 0.05 and R2 values close to or above 0.8. The average depths of the root system in wetland savanna woodland and open woody savanna are 0.8 ± 0.3 m and 0.7 ± 0.2 m, respectively, and differ from the root systems of savanna woody species in non-flooding areas, whose depth usually ranges from 3 to 19 m.Weattribute this difference to the adaptation of woody plant to the shallow water table, particularly during the wet season. This singularity of woody species in wetland savannas is important when considering biomass and carbon stocks for national and global carbon inventories. 650 $aPantanal 650 $aBiomassa 650 $aDiâmetro 650 $aRaiz 653 $aComportamento 653 $aEquação alométrica 700 1 $aLEHN, C. R. 700 1 $aMATTOS, P. P. de 700 1 $aBERGIER, I. 700 1 $aCRISPIM, S. M. A. 773 $tGlobal Ecology and Conservation$gv. 2, p. 378-384, Dec. 2014.
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Embrapa Florestas (CNPF) |
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Registro Completo
Biblioteca(s): |
Embrapa Agrobiologia. |
Data corrente: |
28/04/2023 |
Data da última atualização: |
28/04/2023 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 3 |
Autoria: |
SPASIANI, P. P.; HOMEM, B. G. C.; LIMA, I. B. G. de; GUIMARAES, B. C.; MEDEIROS, E. S. de; MUIR, J. P.; OLIVEIRA, M. S. de; BODDEY, R. M.; CASAGRANDEM, D. R. |
Afiliação: |
PAOLA PALAURO SPASIANI, UFLA; BRUNO GROSSI COSTA HOMEM, UFLA; ITALO BRAZ GONCALVES DE LIMA, UFLA; BIANCA COSTA GUIMARAES, UFLA; ELIAS SILVA DE MEDEIROS, UNIVERSIDADE FEDERAL DA GRANDE DOURADOS; JAMES PIERRE MUIR, TEXAS A&M UNIVERSITY; MARCELO SILVA DE OLIVEIRA, UFLA; ROBERT MICHAEL BODDEY, CNPAB; DANIEL RUME CASAGRANDE, UFLA. |
Título: |
Light competition is the key factor determining spatio-temporal variability in legume proportion within Marandu palisadegrass-forage peanut mixed pastures. |
Ano de publicação: |
2023 |
Fonte/Imprenta: |
Crop & Pasture Science, Published online: 21 March 2023. |
ISSN: |
1836-0947 |
DOI: |
10.1071/CP22134 |
Idioma: |
Inglês |
Conteúdo: |
Context Understanding ecology in grass-legume pastures can help support strategies aimed at maintaining canopy stability in terms of botanical composition.Aims This 2-year study evaluated spatial variability, focusing on plant structural characteristics in a Marandu palisadegrass [Urochloa brizantha (Hochst. Ex A. Rich.) R.D. Webster cv. Marandu]-forage peanut (Arachis pintoi Krapov. and W.C. Greg. cv. BRS Mandobi) mixed canopy under grazing in continuous stocking management.Methods The pasture was managed with canopy height of 20-25 cm. The experimental area had a permanent sample grid containing 50 pre-established and georeferenced plots. Principal component analysis was performed, and spatial dependence structure of the first principal component and structural variables were separately characterised by geostatistical analysis.Key results There was spatial dependence of the structural characteristics, with marked spatial heterogeneity in the distribution of all variables. Taller grass canopies caused competition for light between species, reducing legume contribution and inducing more erect forage peanut growth habit. Conversely, in areas with lower grass canopy height, forage peanut botanical composition increased to up to 70%, as it propagated more effectively by stoloniferous propagation.Conclusions The canopy structure spatial variability of a Marandu palisadegrass-forage peanut mixed pasture determines the overall average pasture grass/legume proportion. In regions with taller canopies, Marandu palisadegrass was favoured, while in areas with shorter canopy, forage peanut proportion was promoted. Satisfactory legume proportions can be reached in the canopy despite areas with reduced legume contribution.Implications Our findings using geostatistical techniques facilitate the development of useful and innovative tools allowing better comprehension for the management of mixed pastures. MenosContext Understanding ecology in grass-legume pastures can help support strategies aimed at maintaining canopy stability in terms of botanical composition.Aims This 2-year study evaluated spatial variability, focusing on plant structural characteristics in a Marandu palisadegrass [Urochloa brizantha (Hochst. Ex A. Rich.) R.D. Webster cv. Marandu]-forage peanut (Arachis pintoi Krapov. and W.C. Greg. cv. BRS Mandobi) mixed canopy under grazing in continuous stocking management.Methods The pasture was managed with canopy height of 20-25 cm. The experimental area had a permanent sample grid containing 50 pre-established and georeferenced plots. Principal component analysis was performed, and spatial dependence structure of the first principal component and structural variables were separately characterised by geostatistical analysis.Key results There was spatial dependence of the structural characteristics, with marked spatial heterogeneity in the distribution of all variables. Taller grass canopies caused competition for light between species, reducing legume contribution and inducing more erect forage peanut growth habit. Conversely, in areas with lower grass canopy height, forage peanut botanical composition increased to up to 70%, as it propagated more effectively by stoloniferous propagation.Conclusions The canopy structure spatial variability of a Marandu palisadegrass-forage peanut mixed pasture determines the overall average pasture grass/legume proportion. In regions wi... Mostrar Tudo |
Palavras-Chave: |
Clonal propagation; Mixed pasture; Spatial variability; Warm season legume. |
Thesaurus NAL: |
Arachis pintoi; Geostatistics; Urochloa brizantha. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
Marc: |
LEADER 02938naa a2200325 a 4500 001 2153435 005 2023-04-28 008 2023 bl uuuu u00u1 u #d 022 $a1836-0947 024 7 $a10.1071/CP22134$2DOI 100 1 $aSPASIANI, P. P. 245 $aLight competition is the key factor determining spatio-temporal variability in legume proportion within Marandu palisadegrass-forage peanut mixed pastures.$h[electronic resource] 260 $c2023 520 $aContext Understanding ecology in grass-legume pastures can help support strategies aimed at maintaining canopy stability in terms of botanical composition.Aims This 2-year study evaluated spatial variability, focusing on plant structural characteristics in a Marandu palisadegrass [Urochloa brizantha (Hochst. Ex A. Rich.) R.D. Webster cv. Marandu]-forage peanut (Arachis pintoi Krapov. and W.C. Greg. cv. BRS Mandobi) mixed canopy under grazing in continuous stocking management.Methods The pasture was managed with canopy height of 20-25 cm. The experimental area had a permanent sample grid containing 50 pre-established and georeferenced plots. Principal component analysis was performed, and spatial dependence structure of the first principal component and structural variables were separately characterised by geostatistical analysis.Key results There was spatial dependence of the structural characteristics, with marked spatial heterogeneity in the distribution of all variables. Taller grass canopies caused competition for light between species, reducing legume contribution and inducing more erect forage peanut growth habit. Conversely, in areas with lower grass canopy height, forage peanut botanical composition increased to up to 70%, as it propagated more effectively by stoloniferous propagation.Conclusions The canopy structure spatial variability of a Marandu palisadegrass-forage peanut mixed pasture determines the overall average pasture grass/legume proportion. In regions with taller canopies, Marandu palisadegrass was favoured, while in areas with shorter canopy, forage peanut proportion was promoted. Satisfactory legume proportions can be reached in the canopy despite areas with reduced legume contribution.Implications Our findings using geostatistical techniques facilitate the development of useful and innovative tools allowing better comprehension for the management of mixed pastures. 650 $aArachis pintoi 650 $aGeostatistics 650 $aUrochloa brizantha 653 $aClonal propagation 653 $aMixed pasture 653 $aSpatial variability 653 $aWarm season legume 700 1 $aHOMEM, B. G. C. 700 1 $aLIMA, I. B. G. de 700 1 $aGUIMARAES, B. C. 700 1 $aMEDEIROS, E. S. de 700 1 $aMUIR, J. P. 700 1 $aOLIVEIRA, M. S. de 700 1 $aBODDEY, R. M. 700 1 $aCASAGRANDEM, D. R. 773 $tCrop & Pasture Science, Published online: 21 March 2023.
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