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Registro Completo |
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Biblioteca(s): |
Embrapa Agricultura Digital. |
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Data corrente: |
21/05/2014 |
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Data da última atualização: |
08/01/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
NASSIF, D. S. P.; MARIN, F. R.; COSTA, L. G. |
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Afiliação: |
DANIEL S. P. NASSIF, Esalq/USP; FABIO RICARDO MARIN, CNPTIA; LEANDRO G. COSTA, Esalq/USP. |
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Título: |
Evapotranspiration and transpiration coupling to the atmosphere of sugarcane in southern Brazil: scaling up from leaf to field. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Sugar Tech, New Delhi, v. 16, n. 3, p. 250-254, July/Sept. 2014. |
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DOI: |
10.1007/s12355-013-0267-0 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract In some of the traditional areas growing sugarcane and in most of the expanding regions in Brazil, water deficit stress is a limiting factor and irrigation is usually needed to assure economically viable sugarcane yields. This research evaluated the water requirements of a drip-irrigated second ratoon sugarcane crop based on three different spatial scales: field, plant and leaf. The Bowen atio method (BRM) was used to evaluate the mass and energy exchanges over the field, further computing the crop evapotranspiration (ETc). Sap flow by heat balance method nstalled in four representative stalks was used to evaluate he water use at the plant scale, and an infra-red gas analyser was used to evaluate leaf transpiration and stomatal conductance at the leaf scale. Comparing ETc and reference evapotranspiration we found that the crop coefficients or dry and wet seasons were 0.81 and 0.98, respectively. Evapotranspiration peaks of 7 mm day-1 were observed under conditions of strong crop-atmosphere coupling and high net radiation values. The stomatal conductance ranged from 0.09 to 0.19 mmol m-2 s-1 in dry and wet seasons respectively, showing sensitivity to the atmospheric conditions, notably the vapour deficit pressure and wind speed. BRM ranged from 3.7 to 4.4 mm day-1 and leaf transpiration ranged among 3.4 and 4.2 mm day-1. In an irrigated sugarcane production area in Brazil, water consumption of the sugarcane crop was highly correlated with atmospheric conditions. |
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Palavras-Chave: |
Condutância estomática; Estresse hídrico; Fluxo de seiva. |
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Thesagro: |
Balanço de Energia; Balanço hídrico; Irrigação. |
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Thesaurus Nal: |
Energy balance; Irrigation; Sap flow; Stomatal conductance; Water stress. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02393naa a2200289 a 4500
001 1986730
005 2020-01-08
008 2014 bl uuuu u00u1 u #d
024 7 $a10.1007/s12355-013-0267-0$2DOI
100 1 $aNASSIF, D. S. P.
245 $aEvapotranspiration and transpiration coupling to the atmosphere of sugarcane in southern Brazil$bscaling up from leaf to field.$h[electronic resource]
260 $c2014
520 $aAbstract In some of the traditional areas growing sugarcane and in most of the expanding regions in Brazil, water deficit stress is a limiting factor and irrigation is usually needed to assure economically viable sugarcane yields. This research evaluated the water requirements of a drip-irrigated second ratoon sugarcane crop based on three different spatial scales: field, plant and leaf. The Bowen atio method (BRM) was used to evaluate the mass and energy exchanges over the field, further computing the crop evapotranspiration (ETc). Sap flow by heat balance method nstalled in four representative stalks was used to evaluate he water use at the plant scale, and an infra-red gas analyser was used to evaluate leaf transpiration and stomatal conductance at the leaf scale. Comparing ETc and reference evapotranspiration we found that the crop coefficients or dry and wet seasons were 0.81 and 0.98, respectively. Evapotranspiration peaks of 7 mm day-1 were observed under conditions of strong crop-atmosphere coupling and high net radiation values. The stomatal conductance ranged from 0.09 to 0.19 mmol m-2 s-1 in dry and wet seasons respectively, showing sensitivity to the atmospheric conditions, notably the vapour deficit pressure and wind speed. BRM ranged from 3.7 to 4.4 mm day-1 and leaf transpiration ranged among 3.4 and 4.2 mm day-1. In an irrigated sugarcane production area in Brazil, water consumption of the sugarcane crop was highly correlated with atmospheric conditions.
650 $aEnergy balance
650 $aIrrigation
650 $aSap flow
650 $aStomatal conductance
650 $aWater stress
650 $aBalanço de Energia
650 $aBalanço hídrico
650 $aIrrigação
653 $aCondutância estomática
653 $aEstresse hídrico
653 $aFluxo de seiva
700 1 $aMARIN, F. R.
700 1 $aCOSTA, L. G.
773 $tSugar Tech, New Delhi$gv. 16, n. 3, p. 250-254, July/Sept. 2014.
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