Desempenho do método de dissipação térmica na medida do fluxo de seiva em seringueira

Delgado-Rojas, Juan Sinforiano; Righi, Ciro Abbud; Karasawa, Shiguekazu; Angelocci, Luiz Roberto; Bernardes, Marcos Silveira; Folegatti, Marcos Vinícius

doi:10.1590/s0100-69162006000300008

Cited by 7 publications

(6 citation statements)

References 10 publications

(11 reference statements)

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“…This behavior can be attributed to the continuity of SF, even in case of minimal radiation, and aims to replenish the water lost through the plant tissue throughout the day. The latter was also observed by other authors (Delgado-Rojas et al, 2006;Sérvulo et al, 2017).…”

Section: Resultssupporting

confidence: 88%

Leaf Temperature and Transpiration of Pequi Trees With and Without Water Restriction

et al. 2019

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The answers to when and how much to irrigate orchards can be obtained based on the measurements of plants' transpiration and leaf temperature. This study aims to determine the leaf temperature and sap flow of the pequi tree (Caryocar brasiliense Camb.), both with and without water restriction. Further, the leaf temperature was measured by infrared thermometry and estimated transpiration using the Granier method, where the thermal dissipation probes are inserted into the plant stems. The experiment was conducted in a 120-plant orchard located in Goiânia-GO, Brazil, from which seven of the plants (3 irrigated and 4 non-irrigated; aged 6.6-7.4 years) were evaluated for eight months (October 2015 to May 2016). The soil was characterized as a dystrophic red latosol, and its water content was determined using the EC-5 capacitance sensors. The results denoted that the leaf temperature of the irrigated plants was lower than the median air temperature during summer and the transition period into the dry season, and the non-irrigated plants exhibited shortage of water availability during the dry season. In dryland conditions, the average transpiration was 24.09 L plant −1 day −1 and, when irrigated, became 42.29 L plant −1 day −1 .

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Section: Resultssupporting

confidence: 88%

Leaf Temperature and Transpiration of Pequi Trees With and Without Water Restriction

et al. 2019

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“…The thermal dissipation method for measuring the xylematic Sap flow consists of a probe made up of two stainless steel cannulas inserted into the plant stem, with 3-cm length and 2-mm diameter, lined up vertically at a distance of approximately five inches. The use of the method of GRANIER (1985) has been observed in several studies and cultures (PIMENTEL et al, 2010;ROJAS et al, 2006).…”

Section: Sap Flow: Different Methodologiesmentioning

confidence: 99%

Advanced techniques using the plant as indicator of irrigation management

Esteves

Lousada

Sousa³

et al. 2015

Cienc. Rural

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“…No Brasil, a aplicabilidade desses métodos para a determinação da transpiração foi avaliada em laranjeira e mangueira (VELLAME et al, 2009;VELLAME et al, 2010); cafeeiro (PIMENTEL et al, 2010); citros (GIRARDI et al, 2010); lima-ácida (DELGADO-ROJAS et al, 2007); seringueira (DELGADO-ROJAS et al, 2006) e mudas de limoeiro (TREJO-CHANDIA et al, 1997). Adicionalmente, estes métodos foram utilizados em estudos dos efeitos ambientais sobre a transpiração (REIS et al, 2009;VASCONCELOS, 2008;COSTA et al, 2007), na detecção de estresse hídrico (GOMIDE et al, 2005) e na avaliação de obstruções do xilema da laranjeira, causadas pela clorose variegada dos citros (MACHADO et al, 2006).…”

Section: Introductionunclassified

Determinação do fluxo de seiva na cana-de-açúcar pelo método do balanço de energia caulinar

Boehringer¹,

Zolnier²,

Ribeiro³

et al. 2013

Eng. Agríc.

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RESUMO:Medições do fluxo de seiva são importantes não somente no campo da agrometeorologia, mas também em estudos de natureza fisiológica para identificação de doenças vasculares e pesquisas destinadas à quantificação do movimento de água no sistema solo-planta--atmosfera. Este trabalho foi realizado com o objetivo de avaliar o desempenho do método do balanço de energia, a partir da inserção de um minirresistor no centro do colmo de plantas de cana--de-açúcar, visando à determinação do fluxo de seiva sob condições ambientais distintas, utilizando--se de medições gravimétricas como padrão comparativo. O experimento foi conduzido em uma casa de vegetação não climatizada, localizada na área experimental da Universidade Federal de Viçosa, Viçosa -MG. Com base no erro médio de estimativa (MBE), verificou-se que o método do balanço de energia apresentou desempenho satisfatório para a determinação da transpiração da cana-de-açúcar, tanto em condições de céu nublado como parcialmente nublado, tendo subestimado os valores gravimétricos em apenas 3,0 e 6,5 g planta -1 h -1 , respectivamente. Em termos percentuais, esses valores correspondem a 4 e 5% da transpiração máxima da cana-de-açúcar. PALAVRAS-CHAVE:transpiração, Saccharum officinarum, eficiência do uso de água, disponibilidade hídrica, irrigação. SUGARCANE SAP FLOW DETERMINATION BY THE ENERGY BALANCE METHODABSTRACT: Sap flow measurements are important not only in the agrometeorology field, but also in studies of physiological nature to identify vascular diseases and researches concerned with quantification of water movement in soil-plant-atmosphere system. This study was carried out to evaluate the performance of the energy balance method, implemented by insertion of a miniresistor in the stem center of sugarcane plants, in order to determine the sap flow under distinct environment conditions, utilizing gravimetric measurements as comparative standard. The experiment was conducted in a non-environment controlled greenhouse, located at the Federal University of Viçosa, Viçosa-MG. Based on the mean bias error (MBE), it was verified that the energy balance method presented satisfactory results to determine sugarcane transpiration, both in cloudy and partly cloudy sky conditions, underestimating gravimetric values by only 3.0 and 6.5 g plant -1 h -1 , respectively. In percentage terms, these values correspond to 4 and 5% of the maximum sugarcane transpiration.

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Desempenho do método de dissipação térmica na medida do fluxo de seiva em seringueira

Cited by 7 publications

References 10 publications

Leaf Temperature and Transpiration of Pequi Trees With and Without Water Restriction

Leaf Temperature and Transpiration of Pequi Trees With and Without Water Restriction

Advanced techniques using the plant as indicator of irrigation management

Determinação do fluxo de seiva na cana-de-açúcar pelo método do balanço de energia caulinar

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