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Registro Completo |
Biblioteca(s): |
Embrapa Amazônia Oriental; Embrapa Arroz e Feijão; Embrapa Cerrados; Embrapa Meio Norte / UEP-Parnaíba; Embrapa Meio-Norte; Embrapa Rondônia; Embrapa Semiárido; Embrapa Soja; Embrapa Trigo. |
Data corrente: |
04/10/1993 |
Data da última atualização: |
21/06/2000 |
Autoria: |
GUIMARAES, C. M. |
Título: |
Effects of soil moisture and atmospheric conditions on the water status of soybean plants (Glycine max (L.) Merrill). |
Ano de publicação: |
1979 |
Fonte/Imprenta: |
Mississippi: Mississippi State University, 1979. |
Páginas: |
90p. |
Idioma: |
Inglês |
Notas: |
M.Sc. Thesis. |
Conteúdo: |
Two experiments were conducted in the field to study the effects of soil moisture and atmospheric conditions on the water status of soybeans. Leaf diffusive resistance at midday, and leaf water potential early in the morning and at midday were correlated with soil moisture and atmospheric parameters. The atmospheric parameters studied were: solar radiation, potential evapotranspiration, pan evaporation and maximum air temperature. In addition leaf temperatures were correlated with leaf diffusive resistance. Atmospheric conditions explained the variations in leaf diffusive resistance and leaf water potential of non-stressed plants better than in the stressed plants. Water status of nonstressed plants in 1977 were explained better than in 1978. Probably factors associated with limited volume of soil, and different soil structure inside the soil containers used in 1978 were the reason for those variations of results. The highest yields were obtained from plants not stressed during the entire season. Treatments A (water stress initiated during the flowering), B (water stress initiated during early pod formation), and C (water stress initiated during later pod filling) reduced seed yield 73%, 70% and 44%, respectively. The weight of 100 seeds produced by soybean plants of treatments A and the control were the same. However, the seeds on plants of treatments B and C were significantly smaller. Stress applied during the late pod filling stage produced the smallest seeds. Information obtained from this experiment illustrated two points: (1) the importance of studying plant water status under natural environmental conditions, and (2) water stress during late pod filling is more deleterious on soybean yield than water stress imposed at any other stage. MenosTwo experiments were conducted in the field to study the effects of soil moisture and atmospheric conditions on the water status of soybeans. Leaf diffusive resistance at midday, and leaf water potential early in the morning and at midday were correlated with soil moisture and atmospheric parameters. The atmospheric parameters studied were: solar radiation, potential evapotranspiration, pan evaporation and maximum air temperature. In addition leaf temperatures were correlated with leaf diffusive resistance. Atmospheric conditions explained the variations in leaf diffusive resistance and leaf water potential of non-stressed plants better than in the stressed plants. Water status of nonstressed plants in 1977 were explained better than in 1978. Probably factors associated with limited volume of soil, and different soil structure inside the soil containers used in 1978 were the reason for those variations of results. The highest yields were obtained from plants not stressed during the entire season. Treatments A (water stress initiated during the flowering), B (water stress initiated during early pod formation), and C (water stress initiated during later pod filling) reduced seed yield 73%, 70% and 44%, respectively. The weight of 100 seeds produced by soybean plants of treatments A and the control were the same. However, the seeds on plants of treatments B and C were significantly smaller. Stress applied during the late pod filling stage produced the smallest seeds. Informatio... Mostrar Tudo |
Palavras-Chave: |
Atmospheric condition; Balanco de agua; Condicao atmosferica; Efeito; Estresse hidrico; Meteorological elements; Metereological elements; Plant; Plant weater relations; Potencial; Potential; Solos; Soybean. |
Thesagro: |
Água; Água do solo; Atmosfera; Balanço hídrico; Clima; Evapotranspiração; Glycine Max; Manejo de Água; Planta; Relação Água-Planta; Retenção de água no solo; Soja; Solo; Stress; Temperatura; Umidade do Solo. |
Thesaurus Nal: |
climate; soil; soil water content; Soil water retention; soybeans; water; water balance; water stress. |
Categoria do assunto: |
-- P Recursos Naturais, Ciências Ambientais e da Terra |
Marc: |
LEADER 03279nam a2200577 a 4500 001 1560012 005 2000-06-21 008 1979 bl uuuu m 00u1 u #d 100 1 $aGUIMARAES, C. M. 245 $aEffects of soil moisture and atmospheric conditions on the water status of soybean plants (Glycine max (L.) Merrill). 260 $aMississippi: Mississippi State University$c1979 300 $a90p. 500 $aM.Sc. Thesis. 520 $aTwo experiments were conducted in the field to study the effects of soil moisture and atmospheric conditions on the water status of soybeans. Leaf diffusive resistance at midday, and leaf water potential early in the morning and at midday were correlated with soil moisture and atmospheric parameters. The atmospheric parameters studied were: solar radiation, potential evapotranspiration, pan evaporation and maximum air temperature. In addition leaf temperatures were correlated with leaf diffusive resistance. Atmospheric conditions explained the variations in leaf diffusive resistance and leaf water potential of non-stressed plants better than in the stressed plants. Water status of nonstressed plants in 1977 were explained better than in 1978. Probably factors associated with limited volume of soil, and different soil structure inside the soil containers used in 1978 were the reason for those variations of results. The highest yields were obtained from plants not stressed during the entire season. Treatments A (water stress initiated during the flowering), B (water stress initiated during early pod formation), and C (water stress initiated during later pod filling) reduced seed yield 73%, 70% and 44%, respectively. The weight of 100 seeds produced by soybean plants of treatments A and the control were the same. However, the seeds on plants of treatments B and C were significantly smaller. Stress applied during the late pod filling stage produced the smallest seeds. Information obtained from this experiment illustrated two points: (1) the importance of studying plant water status under natural environmental conditions, and (2) water stress during late pod filling is more deleterious on soybean yield than water stress imposed at any other stage. 650 $aclimate 650 $asoil 650 $asoil water content 650 $aSoil water retention 650 $asoybeans 650 $awater 650 $awater balance 650 $awater stress 650 $aÁgua 650 $aÁgua do solo 650 $aAtmosfera 650 $aBalanço hídrico 650 $aClima 650 $aEvapotranspiração 650 $aGlycine Max 650 $aManejo de Água 650 $aPlanta 650 $aRelação Água-Planta 650 $aRetenção de água no solo 650 $aSoja 650 $aSolo 650 $aStress 650 $aTemperatura 650 $aUmidade do Solo 653 $aAtmospheric condition 653 $aBalanco de agua 653 $aCondicao atmosferica 653 $aEfeito 653 $aEstresse hidrico 653 $aMeteorological elements 653 $aMetereological elements 653 $aPlant 653 $aPlant weater relations 653 $aPotencial 653 $aPotential 653 $aSolos 653 $aSoybean
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Registros recuperados : 391 | |
2. | | GUIMARÃES, C. M. Efeitos fisiológicos do estresse hídrico. In: ZIMMERMANN, M. J.de O.; ROCHA, M.; YAMADA, T. (Ed.). Cultura do feijoeiro: fatores que afetam a produtividade. Piracicaba: Associação Brasileira para Pesquisa da Potassa e do Fosfato, 1988. p. 157-174.Biblioteca(s): Embrapa Arroz e Feijão. |
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5. | | GUIMARÃES, C. M. Relacoes hidricas. In: ARAUJO, R. S.; RAVA, C. A.; STONE, L. F.; ZIMMERMANN, M. J. de O. (Coord.). Cultura do feijoeiro comum no Brasil. Piracicaba: POTAFOS, 1996. p. 139-167.Biblioteca(s): Embrapa Arroz e Feijão. |
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13. | | GUIMARÃES, C. M.; YOKOYAMA, L. P. O arroz em plantio direto. In: BRESEGHELLO, F.; STONE, L. F. (Ed.). Tecnologia para o arroz de terras altas. Santo Antônio de Goiás: Embrapa Arroz e Feijão, 1998. p. 25-30.Tipo: Capítulo em Livro Técnico-Científico |
Biblioteca(s): Embrapa Arroz e Feijão. |
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Registros recuperados : 391 | |
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