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Registro Completo |
Biblioteca(s): |
Embrapa Amazônia Ocidental. |
Data corrente: |
15/10/1998 |
Data da última atualização: |
23/08/2012 |
Autoria: |
FERNANDES, E. C. M. |
Título: |
Alley cropping on acid soils. |
Ano de publicação: |
1990 |
Fonte/Imprenta: |
Raleigh: NCSU, 1990. |
Páginas: |
157p. |
Idioma: |
Inglês |
Notas: |
Ph.D. Thesis. |
Conteúdo: |
Two greenhouse studies were undertaken to evaluate: 1) the effects of rock phosphate additions and VA mycorrhizas on growth and nodulation of Inga edulis, Erythrina sp., and Centrosema macrocarpum, and 2) shoot pruning effects on rood dynamics, VA mycorrhizal infections and P and N accumulation in inga and centrosema on an Ultisol. Non-mycorrhizal plants required additon to between 30kg P/ha to 40kg P/ha to attain the same shoot weight as mycorrhizal plants without added P. Plants with mycorrhizae and rhizobia had significantly more nodules than plants with rhizobia alone. Shoot pruning reduced fine root biomass. The greater the intensity of shoot pruning the greater the decline in root biomass, VA mycorrhizal infection, and nodule activity. On acid soils with low P avalilability, additions of 20kg P/ha coupled with plant management to encourage vesicular arbuscular (VA) mycorrhizae could significantly improve the productivity of leguminous tree and pasture species. Two field experiments were performed on an Ultisol (pH 4.3 -4.4) to: 1) evaluate competition between inga hedgerows and crops in alley cropping; and 2) identify provenances of Gliricidia sepium with potential for alley cropping on acid soil. Root competition between inga hedgerows and crops became significant at eleven months after hedgerow establishment and resulted in lower grain yields from alley plots relative to non-alley controls. Fertilizer application and root pruning of hedgerows significantly improved yields across the shole alley. Root competition between hedgerows and crops, and asynchrony of nutrient release from inga prunings and nutrient demand by crops were porbably the main causes for low crop yields. Gliricidia provenance OFI 14/84 showed good tolerance to acid soil conditions and produced 60% more total biomass than the second ranked provenance. Selection of 14/84 for hedgerows in alley cropping, however, will result in excessive competition with crops. The use of less vigorous provenances may improve crop yields in alley cropping. MenosTwo greenhouse studies were undertaken to evaluate: 1) the effects of rock phosphate additions and VA mycorrhizas on growth and nodulation of Inga edulis, Erythrina sp., and Centrosema macrocarpum, and 2) shoot pruning effects on rood dynamics, VA mycorrhizal infections and P and N accumulation in inga and centrosema on an Ultisol. Non-mycorrhizal plants required additon to between 30kg P/ha to 40kg P/ha to attain the same shoot weight as mycorrhizal plants without added P. Plants with mycorrhizae and rhizobia had significantly more nodules than plants with rhizobia alone. Shoot pruning reduced fine root biomass. The greater the intensity of shoot pruning the greater the decline in root biomass, VA mycorrhizal infection, and nodule activity. On acid soils with low P avalilability, additions of 20kg P/ha coupled with plant management to encourage vesicular arbuscular (VA) mycorrhizae could significantly improve the productivity of leguminous tree and pasture species. Two field experiments were performed on an Ultisol (pH 4.3 -4.4) to: 1) evaluate competition between inga hedgerows and crops in alley cropping; and 2) identify provenances of Gliricidia sepium with potential for alley cropping on acid soil. Root competition between inga hedgerows and crops became significant at eleven months after hedgerow establishment and resulted in lower grain yields from alley plots relative to non-alley controls. Fertilizer application and root pruning of hedgerows significantly improved ... Mostrar Tudo |
Palavras-Chave: |
Centrosema macrocarpum; Consorciacao; Hedges; Origem; Phosphate fertilizers; Species; Tropical rain forest. |
Thesagro: |
Adubação; Espécie; Estufa; Floresta Tropical Úmida; Fosfato; Ingá Edulis; Micorriza; Nodulação; Planta Para Cerca Viva; Poda; Sistema de Cultivo; Solo Ácido. |
Thesaurus Nal: |
acid soils; alley cropping; Erythrina; Gliricidia sepium; greenhouses; mycorrhizae; nodulation; provenance; pruning. |
Categoria do assunto: |
-- |
Marc: |
LEADER 03168nam a2200469 a 4500 001 1666888 005 2012-08-23 008 1990 bl uuuu m 00u1 u #d 100 1 $aFERNANDES, E. C. M. 245 $aAlley cropping on acid soils. 260 $aRaleigh: NCSU$c1990 300 $a157p. 500 $aPh.D. Thesis. 520 $aTwo greenhouse studies were undertaken to evaluate: 1) the effects of rock phosphate additions and VA mycorrhizas on growth and nodulation of Inga edulis, Erythrina sp., and Centrosema macrocarpum, and 2) shoot pruning effects on rood dynamics, VA mycorrhizal infections and P and N accumulation in inga and centrosema on an Ultisol. Non-mycorrhizal plants required additon to between 30kg P/ha to 40kg P/ha to attain the same shoot weight as mycorrhizal plants without added P. Plants with mycorrhizae and rhizobia had significantly more nodules than plants with rhizobia alone. Shoot pruning reduced fine root biomass. The greater the intensity of shoot pruning the greater the decline in root biomass, VA mycorrhizal infection, and nodule activity. On acid soils with low P avalilability, additions of 20kg P/ha coupled with plant management to encourage vesicular arbuscular (VA) mycorrhizae could significantly improve the productivity of leguminous tree and pasture species. Two field experiments were performed on an Ultisol (pH 4.3 -4.4) to: 1) evaluate competition between inga hedgerows and crops in alley cropping; and 2) identify provenances of Gliricidia sepium with potential for alley cropping on acid soil. Root competition between inga hedgerows and crops became significant at eleven months after hedgerow establishment and resulted in lower grain yields from alley plots relative to non-alley controls. Fertilizer application and root pruning of hedgerows significantly improved yields across the shole alley. Root competition between hedgerows and crops, and asynchrony of nutrient release from inga prunings and nutrient demand by crops were porbably the main causes for low crop yields. Gliricidia provenance OFI 14/84 showed good tolerance to acid soil conditions and produced 60% more total biomass than the second ranked provenance. Selection of 14/84 for hedgerows in alley cropping, however, will result in excessive competition with crops. The use of less vigorous provenances may improve crop yields in alley cropping. 650 $aacid soils 650 $aalley cropping 650 $aErythrina 650 $aGliricidia sepium 650 $agreenhouses 650 $amycorrhizae 650 $anodulation 650 $aprovenance 650 $apruning 650 $aAdubação 650 $aEspécie 650 $aEstufa 650 $aFloresta Tropical Úmida 650 $aFosfato 650 $aIngá Edulis 650 $aMicorriza 650 $aNodulação 650 $aPlanta Para Cerca Viva 650 $aPoda 650 $aSistema de Cultivo 650 $aSolo Ácido 653 $aCentrosema macrocarpum 653 $aConsorciacao 653 $aHedges 653 $aOrigem 653 $aPhosphate fertilizers 653 $aSpecies 653 $aTropical rain forest
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Embrapa Amazônia Ocidental (CPAA) |
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Registro Completo
Biblioteca(s): |
Embrapa Soja. |
Data corrente: |
06/07/2005 |
Data da última atualização: |
06/11/2023 |
Tipo da produção científica: |
Resumo em Anais de Congresso |
Autoria: |
DIAS, W. P.; CAMPOS, V. P.; KIIHL, R. A. S.; ARIAS, C. A. A.; TOLEDO, J. F. F. |
Afiliação: |
CARLOS ALBERTO ARRABAL ARIAS, CNPSO. |
Título: |
Genética da resistência da soja à raça 4+ do nematóide de cisto Heterodera glycines. |
Ano de publicação: |
2005 |
Fonte/Imprenta: |
Nematologia Brasileira, v. 29, n. 1, p. 109, jun. 2005. |
Idioma: |
Português |
Notas: |
Resumo apresentado no XXV Congresso Brasileiro de Nematologia, Piracicaba, fev. 2005. |
Palavras-Chave: |
Nematóde. |
Thesagro: |
Soja. |
Thesaurus NAL: |
Soybeans. |
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
Marc: |
LEADER 00658nam a2200193 a 4500 001 1468157 005 2023-11-06 008 2005 bl uuuu u00u1 u #d 100 1 $aDIAS, W. P. 245 $aGenética da resistência da soja à raça 4+ do nematóide de cisto Heterodera glycines.$h[electronic resource] 260 $aNematologia Brasileira, v. 29, n. 1, p. 109, jun. 2005.$c2005 500 $aResumo apresentado no XXV Congresso Brasileiro de Nematologia, Piracicaba, fev. 2005. 650 $aSoybeans 650 $aSoja 653 $aNematóde 700 1 $aCAMPOS, V. P. 700 1 $aKIIHL, R. A. S. 700 1 $aARIAS, C. A. A. 700 1 $aTOLEDO, J. F. F.
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