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 | Acesso ao texto completo restrito à biblioteca da Embrapa Agrobiologia. Para informações adicionais entre em contato com cnpab.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
28/04/2023 |
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Data da última atualização: |
28/04/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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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. |
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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. |
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Título: |
Light competition is the key factor determining spatio-temporal variability in legume proportion within Marandu palisadegrass-forage peanut mixed pastures. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Crop & Pasture Science, Published online: 21 March 2023. |
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ISSN: |
1836-0947 |
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DOI: |
10.1071/CP22134 |
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Idioma: |
Inglês |
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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 |
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Palavras-Chave: |
Clonal propagation; Mixed pasture; Spatial variability; Warm season legume. |
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Thesaurus Nal: |
Arachis pintoi; Geostatistics; Urochloa brizantha. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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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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Registro original: |
Embrapa Agrobiologia (CNPAB) |
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Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
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Registro Completo
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Biblioteca(s): |
Embrapa Florestas; Embrapa Rondônia. |
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Data corrente: |
09/06/2015 |
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Data da última atualização: |
10/11/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
SPINELLI, V. M.; DIAS, L. A. S.; ROCHA, R. B.; RESENDE, M. D. V. |
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Afiliação: |
Victor M. Spinelli, Universidade Federal de Viçosa; Luiz Antonio S. Dias, Universidade Federal de Viçosa; RODRIGO BARROS ROCHA, CPAF-RO; Marcos Deon V. Resende, Universidade Federal de Viçosa. |
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Título: |
Estimates of genetic parameters with selection within and between half-sib families of Jatropha curcas L. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
Industrial Crops and Products, v. 69, p. 355?361, 2015. |
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Idioma: |
Inglês |
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Conteúdo: |
Jatropha curcas L., the most promising oilseed plant for biodiesel and biokerosene, is in the process of domestication, and the economic, social and environmental viability of the crop depends on increasing its yield performance. Low seed yield is due, above all, to planting of non-improved cultivars. We evaluated 16 half-sib families in the 2nd, 3rd and 4th years after planting. The components evaluated were seed yield, number of trusses per plant, number of fruits per truss, fruit maturation rate, plant height and canopy diameter. We also estimated the genetic parameters of these components with a view toward quantifying genetic gain from plant selection. The main seed yield components exhibited predominant genetic control. Nevertheless, the environmental effect was the main determinant of uniformity in fruit maturation. Thus, management strategies have greater potential for having an impact on concentration of fruit production of this oilseed plant. Genetic gains related to seed yield in the cropping of genotypes selected in the 2nd, 3rd, and 4th years were 33.3%, 41.6% and 56.7%, respectively. The development of new genotypes should furthermore consider strategies for generation of variability using crosses between divergent plants with better agronomic characteristics. |
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Palavras-Chave: |
Gains from selection; Genetic parameters; Parâmetros genéticos; Physic nut; Pinhão manso; Produção de semente. |
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Thesagro: |
Jatropha Curcas; Parâmetro Genético; Planta Oleaginosa; Produção de Sementes. |
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Thesaurus NAL: |
seed yield. |
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Categoria do assunto: |
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K Ciência Florestal e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/137324/1/Spinelli-Industrial-Crops-2015.pdf
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Marc: |
LEADER 02172naa a2200289 a 4500
001 2034446
005 2021-11-10
008 2015 bl uuuu u00u1 u #d
100 1 $aSPINELLI, V. M.
245 $aEstimates of genetic parameters with selection within and between half-sib families of Jatropha curcas L.$h[electronic resource]
260 $c2015
520 $aJatropha curcas L., the most promising oilseed plant for biodiesel and biokerosene, is in the process of domestication, and the economic, social and environmental viability of the crop depends on increasing its yield performance. Low seed yield is due, above all, to planting of non-improved cultivars. We evaluated 16 half-sib families in the 2nd, 3rd and 4th years after planting. The components evaluated were seed yield, number of trusses per plant, number of fruits per truss, fruit maturation rate, plant height and canopy diameter. We also estimated the genetic parameters of these components with a view toward quantifying genetic gain from plant selection. The main seed yield components exhibited predominant genetic control. Nevertheless, the environmental effect was the main determinant of uniformity in fruit maturation. Thus, management strategies have greater potential for having an impact on concentration of fruit production of this oilseed plant. Genetic gains related to seed yield in the cropping of genotypes selected in the 2nd, 3rd, and 4th years were 33.3%, 41.6% and 56.7%, respectively. The development of new genotypes should furthermore consider strategies for generation of variability using crosses between divergent plants with better agronomic characteristics.
650 $aseed yield
650 $aJatropha Curcas
650 $aParâmetro Genético
650 $aPlanta Oleaginosa
650 $aProdução de Sementes
653 $aGains from selection
653 $aGenetic parameters
653 $aParâmetros genéticos
653 $aPhysic nut
653 $aPinhão manso
653 $aProdução de semente
700 1 $aDIAS, L. A. S.
700 1 $aROCHA, R. B.
700 1 $aRESENDE, M. D. V.
773 $tIndustrial Crops and Products$gv. 69, p. 355?361, 2015.
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Embrapa Rondônia (CPAF-RO) |
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