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Registro Completo |
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
29/07/2002 |
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Data da última atualização: |
29/01/2021 |
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Autoria: |
CAMARGO, A. P. de; RAIJ, B. V.; CANTARELLA, H.; ROCHA, T. R. da; NAGAI, V.; MASCARENHAS, H. A. A. |
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Título: |
Efeito da calagem nas produções de cinco cultivos de milho, seguidos de algodão e soja. |
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Ano de publicação: |
1982 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, V.17, n.7, p. 1007-1012, jul. 1982. |
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Idioma: |
Português |
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Notas: |
Título em inglês: Effect of liming on yields of five successive crops of maize followed by cotton and soybeans. |
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Conteúdo: |
RESUMO - Conduziu-se um ensaio de calagem, em solo Podzólico Vermelho-Amarelo. de Mococa, SP, por um período de sete anos. Nos cinco primeiros anos cultivou-se milho (Zea mays L.) e, depois, algodão e soja. Foram aplicadas 0, 3, 6 e 9 t/ha de calcário dolornítico com PRNT de 59%. 0 nível mais elevado de aplicação do corretivo elevou o pH a 5,9. 0 efeito da calagem no solo persistiu até o sétimo ano, embora com perda de bases do solo durante esse período. 0 efeito da calagem na produção foi altamente significativo. 0 aumento de produção já no primeiro ano seria suficiente para pagar o investimento na calagem. Verificou-se que o critério do alumínio trocável para determinar a necessidade de calagem indicaria, para as condições deste trabalho, quantidades muito baixas de calcário. ABSTRACT - A liming experiment was conducted during seven years on a red-yellow podzolic soil of Mococa, state of São Paulo. Maize (Zea mays L. was grown during the tive first years and thereafter cotton and soybeans. The amounts of dolomitic limestone applied, with PRNT (relative power of total neutralization) of 59% were O, 3, 6 and 9 t/ha. With 9 t/ha of applied limestone the pH reached 5,9. The effect of liming remained until the seventh year, although with losses of calcium and magnesium from the soil. The effect of liming on yield was highly signuficant for all crops. The increases in yield of maize of the first year would be sufficient to repay the investment with limestone. The aluminum criteria to determine the lime requirements of the soil of this experiment would indicate far too low amounts of limestone MenosRESUMO - Conduziu-se um ensaio de calagem, em solo Podzólico Vermelho-Amarelo. de Mococa, SP, por um período de sete anos. Nos cinco primeiros anos cultivou-se milho (Zea mays L.) e, depois, algodão e soja. Foram aplicadas 0, 3, 6 e 9 t/ha de calcário dolornítico com PRNT de 59%. 0 nível mais elevado de aplicação do corretivo elevou o pH a 5,9. 0 efeito da calagem no solo persistiu até o sétimo ano, embora com perda de bases do solo durante esse período. 0 efeito da calagem na produção foi altamente significativo. 0 aumento de produção já no primeiro ano seria suficiente para pagar o investimento na calagem. Verificou-se que o critério do alumínio trocável para determinar a necessidade de calagem indicaria, para as condições deste trabalho, quantidades muito baixas de calcário. ABSTRACT - A liming experiment was conducted during seven years on a red-yellow podzolic soil of Mococa, state of São Paulo. Maize (Zea mays L. was grown during the tive first years and thereafter cotton and soybeans. The amounts of dolomitic limestone applied, with PRNT (relative power of total neutralization) of 59% were O, 3, 6 and 9 t/ha. With 9 t/ha of applied limestone the pH reached 5,9. The effect of liming remained until the seventh year, although with losses of calcium and magnesium from the soil. The effect of liming on yield was highly signuficant for all crops. The increases in yield of maize of the first year would be sufficient to repay the investment with limestone. The aluminum criter... Mostrar Tudo |
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Thesagro: |
Algodão; Alumínio; Calagem; Calcário Dolomítico; Corretivo; Milho; Soja; Zea Mays. |
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Thesaurus Nal: |
Cotton; Dolomitic limestone; Exchangeable aluminum; Liming; Soybeans. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/220770/1/Efeito-calagem-producoes-1982.pdf
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Marc: |
LEADER 02674naa a2200349 a 4500
001 1107687
005 2021-01-29
008 1982 bl uuuu u00u1 u #d
100 1 $aCAMARGO, A. P. de
245 $aEfeito da calagem nas produções de cinco cultivos de milho, seguidos de algodão e soja.
260 $c1982
500 $aTítulo em inglês: Effect of liming on yields of five successive crops of maize followed by cotton and soybeans.
520 $aRESUMO - Conduziu-se um ensaio de calagem, em solo Podzólico Vermelho-Amarelo. de Mococa, SP, por um período de sete anos. Nos cinco primeiros anos cultivou-se milho (Zea mays L.) e, depois, algodão e soja. Foram aplicadas 0, 3, 6 e 9 t/ha de calcário dolornítico com PRNT de 59%. 0 nível mais elevado de aplicação do corretivo elevou o pH a 5,9. 0 efeito da calagem no solo persistiu até o sétimo ano, embora com perda de bases do solo durante esse período. 0 efeito da calagem na produção foi altamente significativo. 0 aumento de produção já no primeiro ano seria suficiente para pagar o investimento na calagem. Verificou-se que o critério do alumínio trocável para determinar a necessidade de calagem indicaria, para as condições deste trabalho, quantidades muito baixas de calcário. ABSTRACT - A liming experiment was conducted during seven years on a red-yellow podzolic soil of Mococa, state of São Paulo. Maize (Zea mays L. was grown during the tive first years and thereafter cotton and soybeans. The amounts of dolomitic limestone applied, with PRNT (relative power of total neutralization) of 59% were O, 3, 6 and 9 t/ha. With 9 t/ha of applied limestone the pH reached 5,9. The effect of liming remained until the seventh year, although with losses of calcium and magnesium from the soil. The effect of liming on yield was highly signuficant for all crops. The increases in yield of maize of the first year would be sufficient to repay the investment with limestone. The aluminum criteria to determine the lime requirements of the soil of this experiment would indicate far too low amounts of limestone
650 $aCotton
650 $aDolomitic limestone
650 $aExchangeable aluminum
650 $aLiming
650 $aSoybeans
650 $aAlgodão
650 $aAlumínio
650 $aCalagem
650 $aCalcário Dolomítico
650 $aCorretivo
650 $aMilho
650 $aSoja
650 $aZea Mays
700 1 $aRAIJ, B. V.
700 1 $aCANTARELLA, H.
700 1 $aROCHA, T. R. da
700 1 $aNAGAI, V.
700 1 $aMASCARENHAS, H. A. A.
773 $tPesquisa Agropecuária Brasileira, Brasília, V.17$gn.7, p. 1007-1012, jul. 1982.
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Embrapa Unidades Centrais (AI-SEDE) |
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Biblioteca(s): |
Embrapa Amazônia Oriental; Embrapa Recursos Genéticos e Biotecnologia. |
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Data corrente: |
18/02/2008 |
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Data da última atualização: |
12/08/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
Internacional - A |
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Autoria: |
AZEVEDO, V. C. R.; KANASHIRO, M.; CIAMPI, A. Y.; GRATTAPAGLIA, D. |
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Afiliação: |
Vânia Cristina Renno Azevedo, Embrapa Recursos Genéticos e Biotecnologia; Milton Kanashiro, Embrapa Amazônia Oriental; Ana Yamaguishi Ciampi, Embrapa Recursos Genéticos e Biotecnologia; Dario Grattapaglia, Embrapa Recursos Genéticos e Biotecnologia. |
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Título: |
Genetic structure and mating system of Manilkara huberi (Ducke) A. Chev., a heavily logged amazonian timber species. |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
Journal of Heredity, v. 98, n. 7, p. 646-654, 2007. |
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Idioma: |
Inglês |
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Conteúdo: |
In this work, we report on the population genetic structure of the endangered tree species Manilkara huberi, an Amazonian tree species intensely exploited due to the high density and resistance of its wood. We investigated the patterns of spatial distribution, genetic structure, and mating system using 7 microsatellite loci and here discuss the consequences for conservation and management of the species. To examine the population genetic structure, 481 adult trees and 810 seedlings were sampled from an area of 200 ha from a natural population in FLONA Tapajo´s, PA, Brazil. We found relatively high and consistent inbreeding levels (intrapopulation ?xation index [f] 0.175 and 0.240) and a signi?cant spatial genetic structure up to a radius of approximately 300 m, most likely due to a limited seed and pollen ?ow. The multilocus (tm) population outcrossing ratewas high (0.995), suggesting that the species is predominantly allogamouswith a pollen ?owrestricted to 47m. These results suggest thatM. huberi is spatially structured, consistentwith amodel of isolation by distance. Fragmentationmay therefore cause the loss of subpopulations, suggesting that management programs for production and conservation should include large areas. The genetic data also revealed that for ex situ conservation, seeds should be collected from more than 175 maternal trees, in order to keep an effective population size of 500. Furthermore, as the species is widely distributed across the Amazon Forest, samples should include several populations in order to represent the highest genetic diversity possible. These results provide a blueprint to guide the production and conservation management policies of this valuable timber species. MenosIn this work, we report on the population genetic structure of the endangered tree species Manilkara huberi, an Amazonian tree species intensely exploited due to the high density and resistance of its wood. We investigated the patterns of spatial distribution, genetic structure, and mating system using 7 microsatellite loci and here discuss the consequences for conservation and management of the species. To examine the population genetic structure, 481 adult trees and 810 seedlings were sampled from an area of 200 ha from a natural population in FLONA Tapajo´s, PA, Brazil. We found relatively high and consistent inbreeding levels (intrapopulation ?xation index [f] 0.175 and 0.240) and a signi?cant spatial genetic structure up to a radius of approximately 300 m, most likely due to a limited seed and pollen ?ow. The multilocus (tm) population outcrossing ratewas high (0.995), suggesting that the species is predominantly allogamouswith a pollen ?owrestricted to 47m. These results suggest thatM. huberi is spatially structured, consistentwith amodel of isolation by distance. Fragmentationmay therefore cause the loss of subpopulations, suggesting that management programs for production and conservation should include large areas. The genetic data also revealed that for ex situ conservation, seeds should be collected from more than 175 maternal trees, in order to keep an effective population size of 500. Furthermore, as the species is widely distributed across the Amazon Forest, sa... Mostrar Tudo |
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Palavras-Chave: |
Brasil. |
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Thesagro: |
Árvore; Conservação; Fruta Tropical; Genética Vegetal; Maçaranduba; Manilkara Huberi. |
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Thesaurus NAL: |
Amazonia. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/178256/1/esm074.pdf
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Marc: |
LEADER 02470naa a2200253 a 4500
001 1188793
005 2022-08-12
008 2007 bl uuuu u00u1 u #d
100 1 $aAZEVEDO, V. C. R.
245 $aGenetic structure and mating system of Manilkara huberi (Ducke) A. Chev., a heavily logged amazonian timber species.$h[electronic resource]
260 $c2007
520 $aIn this work, we report on the population genetic structure of the endangered tree species Manilkara huberi, an Amazonian tree species intensely exploited due to the high density and resistance of its wood. We investigated the patterns of spatial distribution, genetic structure, and mating system using 7 microsatellite loci and here discuss the consequences for conservation and management of the species. To examine the population genetic structure, 481 adult trees and 810 seedlings were sampled from an area of 200 ha from a natural population in FLONA Tapajo´s, PA, Brazil. We found relatively high and consistent inbreeding levels (intrapopulation ?xation index [f] 0.175 and 0.240) and a signi?cant spatial genetic structure up to a radius of approximately 300 m, most likely due to a limited seed and pollen ?ow. The multilocus (tm) population outcrossing ratewas high (0.995), suggesting that the species is predominantly allogamouswith a pollen ?owrestricted to 47m. These results suggest thatM. huberi is spatially structured, consistentwith amodel of isolation by distance. Fragmentationmay therefore cause the loss of subpopulations, suggesting that management programs for production and conservation should include large areas. The genetic data also revealed that for ex situ conservation, seeds should be collected from more than 175 maternal trees, in order to keep an effective population size of 500. Furthermore, as the species is widely distributed across the Amazon Forest, samples should include several populations in order to represent the highest genetic diversity possible. These results provide a blueprint to guide the production and conservation management policies of this valuable timber species.
650 $aAmazonia
650 $aÁrvore
650 $aConservação
650 $aFruta Tropical
650 $aGenética Vegetal
650 $aMaçaranduba
650 $aManilkara Huberi
653 $aBrasil
700 1 $aKANASHIRO, M.
700 1 $aCIAMPI, A. Y.
700 1 $aGRATTAPAGLIA, D.
773 $tJournal of Heredity$gv. 98, n. 7, p. 646-654, 2007.
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Embrapa Recursos Genéticos e Biotecnologia (CENARGEN) |
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