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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
23/12/2016 |
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Data da última atualização: |
09/01/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SANTA-ANNA, S. A. C. de; JANTALIA, C. P.; SA, J. M.; VILELA, L.; MARCHAO, R. L.; ALVES, B. J. R.; URQUIAGA, S.; BODDEY, R. M. |
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Afiliação: |
Selenobaldo A. C. de Sant-Anna, Universidade Federal Rural do Rio de Janeiro; CLAUDIA POZZI JANTALIA, CNPAB; Jerusa M. Sa, Universidade Federal Rural do Rio de Janeiro; LOURIVAL VILELA, CPAC; ROBELIO LEANDRO MARCHAO, CPAC; BRUNO JOSE RODRIGUES ALVES, CNPAB; SEGUNDO SACRAMENTO U CABALLERO, CNPAB; ROBERT MICHAEL BODDEY, CNPAB. |
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Título: |
Changes in soil organic carbon during 22 years of pastures, cropping or integrated crop/livestock systems in the Brazilian Cerrado. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Nutrient Cycling in Agroecosystems, December 2016. |
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Páginas: |
20 p. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: In Brazil?s central savanna region, government policy is to encourage the conversion of conventional plough tillage (PT) agriculture to no-till (NT) and raise the productivity of under-utilized pastures, including their conversion to integrated crop-livestock (ICL) systems, with the objective of increasing soil organic carbon (SOC) at the expense of atmospheric carbon dioxide. An experiment was established in 1991 by liming and fertilizing at two levels an area of native vegetation (NV). The treatments, replicated in randomized plots, included pastures, continuous cropping and ICL systems under PT or NT. The aim of this study was to quantify the SOC accumulation to 100 cm depth under these treatments over time. The high C:N ratios suggested that there was a high proportion of charcoal present in the soil. Increasing fertilizer inputs had no overall significant effect on SOC stocks. Stocks of SOC changed little under pastures. Analyses of ¹³C abundance showed that higher fertilizer inputs increased the decomposition rate of C derived from NV under pure grass pastures. Continuous cropping under NT preserved SOC and under PT there were significant losses. The highest SOC stocks were found under ILP treatments, but not all ILP treatments accumulated SOC even under NT. These results indicate that government initiatives to substitute PT with NT and to intensify beef cattle production will have only modest short-term gains in SOC accumulation. |
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Palavras-Chave: |
Abundância de Carbono; Pastagens tropicais; Sequestro de carbono; Sistema de criação de gado integrado. |
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Thesagro: |
Carvão; Cerrado; Leguminosa Forrageira; Solo. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/152260/1/Sant-anna-et-2016.pdf
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Marc: |
LEADER 02390naa a2200313 a 4500
001 2059229
005 2017-01-09
008 2016 bl uuuu u00u1 u #d
100 1 $aSANTA-ANNA, S. A. C. de
245 $aChanges in soil organic carbon during 22 years of pastures, cropping or integrated crop/livestock systems in the Brazilian Cerrado.
260 $c2016
300 $a20 p.
520 $aAbstract: In Brazil?s central savanna region, government policy is to encourage the conversion of conventional plough tillage (PT) agriculture to no-till (NT) and raise the productivity of under-utilized pastures, including their conversion to integrated crop-livestock (ICL) systems, with the objective of increasing soil organic carbon (SOC) at the expense of atmospheric carbon dioxide. An experiment was established in 1991 by liming and fertilizing at two levels an area of native vegetation (NV). The treatments, replicated in randomized plots, included pastures, continuous cropping and ICL systems under PT or NT. The aim of this study was to quantify the SOC accumulation to 100 cm depth under these treatments over time. The high C:N ratios suggested that there was a high proportion of charcoal present in the soil. Increasing fertilizer inputs had no overall significant effect on SOC stocks. Stocks of SOC changed little under pastures. Analyses of ¹³C abundance showed that higher fertilizer inputs increased the decomposition rate of C derived from NV under pure grass pastures. Continuous cropping under NT preserved SOC and under PT there were significant losses. The highest SOC stocks were found under ILP treatments, but not all ILP treatments accumulated SOC even under NT. These results indicate that government initiatives to substitute PT with NT and to intensify beef cattle production will have only modest short-term gains in SOC accumulation.
650 $aCarvão
650 $aCerrado
650 $aLeguminosa Forrageira
650 $aSolo
653 $aAbundância de Carbono
653 $aPastagens tropicais
653 $aSequestro de carbono
653 $aSistema de criação de gado integrado
700 1 $aJANTALIA, C. P.
700 1 $aSA, J. M.
700 1 $aVILELA, L.
700 1 $aMARCHAO, R. L.
700 1 $aALVES, B. J. R.
700 1 $aURQUIAGA, S.
700 1 $aBODDEY, R. M.
773 $tNutrient Cycling in Agroecosystems, December 2016.
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Registro original: |
Embrapa Cerrados (CPAC) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Acre. Para informações adicionais entre em contato com cpafac.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Acre. |
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Data corrente: |
27/09/2012 |
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Data da última atualização: |
06/07/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
SOUSA, A. C. B.; CARVALHO, M. A.; CAMPOS, T. de; SFORÇA, D. A.; ZUCCHI, M. I.; JANK, L.; SOUZA, A. P. |
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Afiliação: |
UNICAMP; MARCELO AYRES CARVALHO, CPAC; TATIANA DE CAMPOS, CPAF-AC; UNICAMP; APTA; LIANA JANK, CNPGC; UNICAMP. |
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Título: |
Molecular diversity, genetic structure and mating system of Calopogonium mucunoides Desv. |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Genetic Resources and Crop Evolution, v. 59, n. 7, p. 1449-1464, Oct. 2012. |
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ISSN: |
0925-9864 (impresso) / 1573-5109 (online) |
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DOI: |
10.1077/s10722-011-9773-7 |
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Idioma: |
Inglês |
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Conteúdo: |
Calopogonium mucunoides Desv. is a species native of South and Central America that is used as green manure and a pasture crop. The molecular genetic diversity was characterized in 195 C. mucunoides accessions from a germplasm collection using 17 microsatellite markers. Outcrossing rate was estimated after the evaluation of six microsatellite loci in 200 genotypes originated from 10 openpollinated progenies (20 genotypes per progeny). Six genetic clusters were identified in the germplasm collection by the STRUCTURE software analysis, neighbor-joining tree comparisons and principal component analysis, which highly correlated with the geographic locations where these accessions were originated or collected. These results were confirmed using AMOVA. The largest portion of the genetic variation was observed among clusters (64.38%). The results indicated that: multilocus outcrossing rate (tm) was 16.3%, suggesting a mixed mating system with a predominance of autogamy; single locus outcrossing rate (ts) was 11%; difference (tm-ts) was 0.054, indicating that only 5.4% of outcrossing occurred among related individuals; paternity correlation (rp) was 33% suggesting a low probability of finding full sibs among the progeny; parental coefficient of inbreeding (Fm) was 5.0%, indicating a low degree of inbreeding in each parent. A core collection for C. mucunoides was assembled to capture the allelic diversity found in this study. The complete allelic diversity was represented by only 15 accessions. These results should be useful for exploiting the genetic resources of C. mucunoides and could influence future conservation efforts and breeding programs. MenosCalopogonium mucunoides Desv. is a species native of South and Central America that is used as green manure and a pasture crop. The molecular genetic diversity was characterized in 195 C. mucunoides accessions from a germplasm collection using 17 microsatellite markers. Outcrossing rate was estimated after the evaluation of six microsatellite loci in 200 genotypes originated from 10 openpollinated progenies (20 genotypes per progeny). Six genetic clusters were identified in the germplasm collection by the STRUCTURE software analysis, neighbor-joining tree comparisons and principal component analysis, which highly correlated with the geographic locations where these accessions were originated or collected. These results were confirmed using AMOVA. The largest portion of the genetic variation was observed among clusters (64.38%). The results indicated that: multilocus outcrossing rate (tm) was 16.3%, suggesting a mixed mating system with a predominance of autogamy; single locus outcrossing rate (ts) was 11%; difference (tm-ts) was 0.054, indicating that only 5.4% of outcrossing occurred among related individuals; paternity correlation (rp) was 33% suggesting a low probability of finding full sibs among the progeny; parental coefficient of inbreeding (Fm) was 5.0%, indicating a low degree of inbreeding in each parent. A core collection for C. mucunoides was assembled to capture the allelic diversity found in this study. The complete allelic diversity was represented by only 15 ... Mostrar Tudo |
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Palavras-Chave: |
Abonos verdes; Fitomejoramiento; Leguminosas forrajeras; Marcador microssatélite; Pastizales; Repeticiones de microsatélite; Variación genética. |
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Thesagro: |
Adubo verde; Calopogônio; Calopogonium mucunoides; Leguminosa forrageira; Marcador genético; Pastagem; Reprodução vegetal; Variação genética. |
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Thesaurus NAL: |
Calopogonium; Forage legumes; Genetic variation; Green manures; Microsatellite repeats; Pastures; Plant breeding. |
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Categoria do assunto: |
G Melhoramento Genético |
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Marc: |
LEADER 03103naa a2200481 a 4500
001 1934866
005 2021-07-06
008 2012 bl uuuu u00u1 u #d
022 $a0925-9864 (impresso) / 1573-5109 (online)
024 7 $a10.1077/s10722-011-9773-7$2DOI
100 1 $aSOUSA, A. C. B.
245 $aMolecular diversity, genetic structure and mating system of Calopogonium mucunoides Desv.$h[electronic resource]
260 $c2012
520 $aCalopogonium mucunoides Desv. is a species native of South and Central America that is used as green manure and a pasture crop. The molecular genetic diversity was characterized in 195 C. mucunoides accessions from a germplasm collection using 17 microsatellite markers. Outcrossing rate was estimated after the evaluation of six microsatellite loci in 200 genotypes originated from 10 openpollinated progenies (20 genotypes per progeny). Six genetic clusters were identified in the germplasm collection by the STRUCTURE software analysis, neighbor-joining tree comparisons and principal component analysis, which highly correlated with the geographic locations where these accessions were originated or collected. These results were confirmed using AMOVA. The largest portion of the genetic variation was observed among clusters (64.38%). The results indicated that: multilocus outcrossing rate (tm) was 16.3%, suggesting a mixed mating system with a predominance of autogamy; single locus outcrossing rate (ts) was 11%; difference (tm-ts) was 0.054, indicating that only 5.4% of outcrossing occurred among related individuals; paternity correlation (rp) was 33% suggesting a low probability of finding full sibs among the progeny; parental coefficient of inbreeding (Fm) was 5.0%, indicating a low degree of inbreeding in each parent. A core collection for C. mucunoides was assembled to capture the allelic diversity found in this study. The complete allelic diversity was represented by only 15 accessions. These results should be useful for exploiting the genetic resources of C. mucunoides and could influence future conservation efforts and breeding programs.
650 $aCalopogonium
650 $aForage legumes
650 $aGenetic variation
650 $aGreen manures
650 $aMicrosatellite repeats
650 $aPastures
650 $aPlant breeding
650 $aAdubo verde
650 $aCalopogônio
650 $aCalopogonium mucunoides
650 $aLeguminosa forrageira
650 $aMarcador genético
650 $aPastagem
650 $aReprodução vegetal
650 $aVariação genética
653 $aAbonos verdes
653 $aFitomejoramiento
653 $aLeguminosas forrajeras
653 $aMarcador microssatélite
653 $aPastizales
653 $aRepeticiones de microsatélite
653 $aVariación genética
700 1 $aCARVALHO, M. A.
700 1 $aCAMPOS, T. de
700 1 $aSFORÇA, D. A.
700 1 $aZUCCHI, M. I.
700 1 $aJANK, L.
700 1 $aSOUZA, A. P.
773 $tGenetic Resources and Crop Evolution$gv. 59, n. 7, p. 1449-1464, Oct. 2012.
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