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Registro Completo |
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Biblioteca(s): |
Embrapa Agropecuária Oeste. |
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Data corrente: |
13/07/2010 |
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Data da última atualização: |
13/06/2011 |
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Autoria: |
BARROS, L. C. G. |
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Título: |
Water use efficiency by corn and beans as affected by mulching rate. |
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Ano de publicação: |
1986 |
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Fonte/Imprenta: |
1986. |
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Páginas: |
137 f. |
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Idioma: |
Inglês |
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Notas: |
Dissertation (Doctor of Philosophy) - Utah State University, Logan. |
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Conteúdo: |
Field experiments were conducted to study the water-use and water-yield production function of corn and beans as influenced by straw mulch rates (), 3.5, 7.0, and 10.5 t/h) and irrigation. The original and a modified version of PLANTGRO model were used to determine the production function. Evapotranspiration (ET) was estimated from measurements of irrigation plus rainfall and soil water depletion. Evaporation (E) was estimated using a micro-lysimeter and Transformation (T) was estimated as ET minus E. Energy balance components were also measured. Despite a similar ET for mulched and bare soil for both crops, dry matter yields for corn and beans and grain yield for beans were higher for mulch than for bare treatments. Corn grain however decreased with increase in mulch rate. Higher transpiration probably contributed to higher yield under mulched condition, as compared to bare soil. Lower corn grain yield was associated with lower soil tempearature in mulch treated soil. Increased yields in a wet season (1984) for low irrigation for corn and niddle irrigation for beans resulted from mulch treatments as compared to bore soil. In a dry season (1985) beans yield was increased by mulch only at high water levels. The lowest mulch rate was as effective in improving yields, for booth crops, as the highest one. Beans yields were more responsive to mulching than corn. The PLANTGRO model gave good predictions of relative grain and dry matter yield for corn. For beans however it did not simulate the grain yield very well.(...) MenosField experiments were conducted to study the water-use and water-yield production function of corn and beans as influenced by straw mulch rates (), 3.5, 7.0, and 10.5 t/h) and irrigation. The original and a modified version of PLANTGRO model were used to determine the production function. Evapotranspiration (ET) was estimated from measurements of irrigation plus rainfall and soil water depletion. Evaporation (E) was estimated using a micro-lysimeter and Transformation (T) was estimated as ET minus E. Energy balance components were also measured. Despite a similar ET for mulched and bare soil for both crops, dry matter yields for corn and beans and grain yield for beans were higher for mulch than for bare treatments. Corn grain however decreased with increase in mulch rate. Higher transpiration probably contributed to higher yield under mulched condition, as compared to bare soil. Lower corn grain yield was associated with lower soil tempearature in mulch treated soil. Increased yields in a wet season (1984) for low irrigation for corn and niddle irrigation for beans resulted from mulch treatments as compared to bore soil. In a dry season (1985) beans yield was increased by mulch only at high water levels. The lowest mulch rate was as effective in improving yields, for booth crops, as the highest one. Beans yields were more responsive to mulching than corn. The PLANTGRO model gave good predictions of relative grain and dry matter yield for corn. For beans however it did not ... Mostrar Tudo |
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Palavras-Chave: |
Bean; Uso. |
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Thesagro: |
Água; Feijão; Irrigação; Manejo; Milho; Phaseolus Vulgaris; Zea Mays. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02151nam a2200241 a 4500
001 1857513
005 2011-06-13
008 1986 bl uuuu m 00u1 u #d
100 1 $aBARROS, L. C. G.
245 $aWater use efficiency by corn and beans as affected by mulching rate.
260 $a1986.$c1986
300 $a137 f.
500 $aDissertation (Doctor of Philosophy) - Utah State University, Logan.
520 $aField experiments were conducted to study the water-use and water-yield production function of corn and beans as influenced by straw mulch rates (), 3.5, 7.0, and 10.5 t/h) and irrigation. The original and a modified version of PLANTGRO model were used to determine the production function. Evapotranspiration (ET) was estimated from measurements of irrigation plus rainfall and soil water depletion. Evaporation (E) was estimated using a micro-lysimeter and Transformation (T) was estimated as ET minus E. Energy balance components were also measured. Despite a similar ET for mulched and bare soil for both crops, dry matter yields for corn and beans and grain yield for beans were higher for mulch than for bare treatments. Corn grain however decreased with increase in mulch rate. Higher transpiration probably contributed to higher yield under mulched condition, as compared to bare soil. Lower corn grain yield was associated with lower soil tempearature in mulch treated soil. Increased yields in a wet season (1984) for low irrigation for corn and niddle irrigation for beans resulted from mulch treatments as compared to bore soil. In a dry season (1985) beans yield was increased by mulch only at high water levels. The lowest mulch rate was as effective in improving yields, for booth crops, as the highest one. Beans yields were more responsive to mulching than corn. The PLANTGRO model gave good predictions of relative grain and dry matter yield for corn. For beans however it did not simulate the grain yield very well.(...)
650 $aÁgua
650 $aFeijão
650 $aIrrigação
650 $aManejo
650 $aMilho
650 $aPhaseolus Vulgaris
650 $aZea Mays
653 $aBean
653 $aUso
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Registro original: |
Embrapa Agropecuária Oeste (CPAO) |
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| Registros recuperados : 17 | |
| 15. |  | CARNEIRO, P. C. F.; BARROS, L. C. G.; ANJOS, G. M. dos; MARTINS, A. da S.; SANTOS, E. J. S.; SILVA, C. A. Comercialização do tambaqui Colossoma macropomum na cidade de Penedo-AL. In: SEMINÁRIO DA PISCICULTURA ALAGOANA, 2., 2007, Penedo. Anais... Penedo: APL, 2007.| Tipo: Artigo em Anais de Congresso / Nota Técnica | Circulação/Nível: -- - -- |
| Biblioteca(s): Embrapa Tabuleiros Costeiros. |
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| 16. | | RANGEL, P. H. N.; PEREIRA, J. A.; BARROS, L. C. G.; MELO, P. C. S. de; SOARES, D. M.; CUTRIM, V. dos A.; FONSECA, J. R.; MENDONÇA, J. A.; SANTIAGO, C. M. BRS Alvorada e SCSBRS Tio Taka: novas cultivares de arroz de várzea para a região Nordeste do Brasil. Santo Antônio de Goiás: Embrapa Arroz e Feijão, 2006. 4 p. (Embrapa Arroz e Feijão. Comunicado Técnico, 119).| Tipo: Comunicado Técnico/Recomendações Técnicas | Circulação/Nível: -- - -- |
| Biblioteca(s): Embrapa Arroz e Feijão. |
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| 17. | | PEDROSO, B. A.; CARMONA, P. S.; TERRES, A. L. S.; GALLI, J.; RIBEIRO, A. S.; GONÇALO, J. F. P.; CARDOSO, M. J.; MATOS, M. A. de O.; BARROS, L. C. G.; SOARES, S. F.; SANTOS FILHO, D. C. dos; TEIXEIRA, A. M. N. A. de P. Programa integrado de melhoramento de arroz com duas gerações por ano. In: REUNIÃO NACIONAL DE PESQUISA DE ARROZ, 2., 1980, Goiânia. Resumos... Goiânia: EMBRAPA-CNPAF, 1986. p. 152-154. (EMBRAPA-CNPAF. Documentos, 13).| Tipo: Resumo em Anais de Congresso |
| Biblioteca(s): Embrapa Arroz e Feijão. |
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| Registros recuperados : 17 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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