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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Norte / UEP-Parnaíba; Embrapa Semiárido. |
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Data corrente: |
03/11/1993 |
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Data da última atualização: |
14/11/2011 |
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Autoria: |
PORTO, E. R. |
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Título: |
Method for estimating water requirements in Brazil with minimum data. |
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Ano de publicação: |
1977 |
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Fonte/Imprenta: |
Logan: Utah State University, 1977. |
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Páginas: |
109p. |
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Idioma: |
Inglês |
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Notas: |
Tese Mestrado. |
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Conteúdo: |
The following developments were included in the present study: 1. A correlation analysis was made of ETP calculated using the Hargreaves equation and latitude, longitude, and elevation for 58 stations in Brazil. 2. With this information, empirical formulas were developed for estimating evapotranspiration in different areas of Brazil by using only latitude, longitude, elevation, or combinations of these parameters. 3. Determinations were made of the influence of the length of record on the reliability of monthly mean values of precipitation. The results of the comparison between the empirical equations developed in this study and Hargreaves' equation indicated reasonable agreement. The greater deviations were observed when the number of stations used in developing the equations increased. For Brazil, the use of the empirical equations is recommended when approximation of evapotranspiration with errors up to 20 percent are acceptable. This statement assumes that ETP values computed using Hargreaves' equation are correct for Brazil. Temperature presented the highest coefficient of determination (r2). A comparison between measured temperature and temperature calculated with empirical equations developed during the correlation analysis showed that the maximum deviation observed in any zone was 1,8 graus C. This indicates that average monthly temperature can be easily predicted in any part of Brazil. ... |
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Palavras-Chave: |
Brasil; Data; Evapotraspiration; Exigencia; Influencia; Method; Methods; Requirement; Requirements. |
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Thesagro: |
Água; Clima; Dado; Estimativa; Evapotranspiração; Irrigação; Método. |
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Thesaurus Nal: |
Brazil; climate; estimation; irrigation; water. |
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Categoria do assunto: |
--
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 02319nam a2200385 a 4500
001 1076284
005 2011-11-14
008 1977 bl uuuu m 00u1 u #d
100 1 $aPORTO, E. R.
245 $aMethod for estimating water requirements in Brazil with minimum data.
260 $aLogan: Utah State University$c1977
300 $a109p.
500 $aTese Mestrado.
520 $aThe following developments were included in the present study: 1. A correlation analysis was made of ETP calculated using the Hargreaves equation and latitude, longitude, and elevation for 58 stations in Brazil. 2. With this information, empirical formulas were developed for estimating evapotranspiration in different areas of Brazil by using only latitude, longitude, elevation, or combinations of these parameters. 3. Determinations were made of the influence of the length of record on the reliability of monthly mean values of precipitation. The results of the comparison between the empirical equations developed in this study and Hargreaves' equation indicated reasonable agreement. The greater deviations were observed when the number of stations used in developing the equations increased. For Brazil, the use of the empirical equations is recommended when approximation of evapotranspiration with errors up to 20 percent are acceptable. This statement assumes that ETP values computed using Hargreaves' equation are correct for Brazil. Temperature presented the highest coefficient of determination (r2). A comparison between measured temperature and temperature calculated with empirical equations developed during the correlation analysis showed that the maximum deviation observed in any zone was 1,8 graus C. This indicates that average monthly temperature can be easily predicted in any part of Brazil. ...
650 $aBrazil
650 $aclimate
650 $aestimation
650 $airrigation
650 $awater
650 $aÁgua
650 $aClima
650 $aDado
650 $aEstimativa
650 $aEvapotranspiração
650 $aIrrigação
650 $aMétodo
653 $aBrasil
653 $aData
653 $aEvapotraspiration
653 $aExigencia
653 $aInfluencia
653 $aMethod
653 $aMethods
653 $aRequirement
653 $aRequirements
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Registro original: |
Embrapa Meio Norte / UEP-Parnaíba (CPAMN-UEPP) |
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Biblioteca |
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Registro Completo
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
21/02/2018 |
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Data da última atualização: |
02/05/2018 |
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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: |
COELHO, D. S.; SIMOES, W. L.; SALVIANO, A. M.; MESQUITA, A. C.; ALBERTO, K. da C. |
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Afiliação: |
DANIELA S. COELHO, Instituto de Meio Ambiente e Recursos Hídricos/Unidade Regional Sertão do São Francisco. Juazeiro, BA; WELSON LIMA SIMOES, CPATSA; ALESSANDRA MONTEIRO SALVIANO, CPATSA; ALESSANDRO C. MESQUITA, Universidade do Estado da Bahia/Departamento de Tecnologia e Ciências Sociais. Juazeiro, BA; KEILA DA C. ALBERTO, UPE. |
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Título: |
Gas exchange and organic solutes in forage sorghum genotypes grown under different salinity levels. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Revista Brasileira de Engenharia Agrícola e Ambiental, Campina Grande, v. 22, n. 4, p. 231-236, 2018. |
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ISSN: |
1807-1929 |
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DOI: |
10.1590/1807-1929/agriambi.v22n4p231-236 |
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Idioma: |
Inglês |
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Conteúdo: |
Adaptation of plants to saline environments depends on the activation of mechanisms that minimize the effects of excess ions on vital processes, such as photosynthesis. The objective of this study was to evaluate the leaf gas exchange, chlorophyll, and organic solute in ten genotypes of forage sorghum irrigated with solutions of different salinity levels. The experiment was conducted in a randomized block design, in a 10 x 6 factorial arrangement, with three replications, using ten genotypes - F305, BRS-655, BRS-610, Volumax, 1.015.045, 1.016.005, 1.016.009, 1.016.013, 1.016.015 and 1.016.031 - and six saline solutions, with electrical conductivity (ECw) of 0, 2.5, 5.0, 7.5, 10 and 12.5 dS m-1. The photosynthetic activity in forage sorghum plants reduces with increasing salinity, and this response was found in the ten genotypes evaluated. The chlorophyll and protein contents were not affected by salinity, whereas carbohydrates and amino acid contents increased with increasing EC w. Soluble sugars are essential for osmoregulation of forage sorghum due to its high content in leaves. |
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Palavras-Chave: |
Forage sorghum. |
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Thesagro: |
Clorofila; Fotossíntese; Salinidade; Sorghum Bicolor; Sorgo forrageiro. |
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Thesaurus NAL: |
Chlorophyll; Photosynthesis; Salt stress. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/172952/1/Welson-2018.pdf
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Marc: |
LEADER 02027naa a2200301 a 4500
001 2088009
005 2018-05-02
008 2018 bl uuuu u00u1 u #d
022 $a1807-1929
024 7 $a10.1590/1807-1929/agriambi.v22n4p231-236$2DOI
100 1 $aCOELHO, D. S.
245 $aGas exchange and organic solutes in forage sorghum genotypes grown under different salinity levels.$h[electronic resource]
260 $c2018
520 $aAdaptation of plants to saline environments depends on the activation of mechanisms that minimize the effects of excess ions on vital processes, such as photosynthesis. The objective of this study was to evaluate the leaf gas exchange, chlorophyll, and organic solute in ten genotypes of forage sorghum irrigated with solutions of different salinity levels. The experiment was conducted in a randomized block design, in a 10 x 6 factorial arrangement, with three replications, using ten genotypes - F305, BRS-655, BRS-610, Volumax, 1.015.045, 1.016.005, 1.016.009, 1.016.013, 1.016.015 and 1.016.031 - and six saline solutions, with electrical conductivity (ECw) of 0, 2.5, 5.0, 7.5, 10 and 12.5 dS m-1. The photosynthetic activity in forage sorghum plants reduces with increasing salinity, and this response was found in the ten genotypes evaluated. The chlorophyll and protein contents were not affected by salinity, whereas carbohydrates and amino acid contents increased with increasing EC w. Soluble sugars are essential for osmoregulation of forage sorghum due to its high content in leaves.
650 $aChlorophyll
650 $aPhotosynthesis
650 $aSalt stress
650 $aClorofila
650 $aFotossíntese
650 $aSalinidade
650 $aSorghum Bicolor
650 $aSorgo forrageiro
653 $aForage sorghum
700 1 $aSIMOES, W. L.
700 1 $aSALVIANO, A. M.
700 1 $aMESQUITA, A. C.
700 1 $aALBERTO, K. da C.
773 $tRevista Brasileira de Engenharia Agrícola e Ambiental, Campina Grande$gv. 22, n. 4, p. 231-236, 2018.
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Registro original: |
Embrapa Semiárido (CPATSA) |
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