Estimativa Da Evapotranspiração De Referência Para Ambiente Protegido

Oliveira, Gertrudes Macário de; Santiago, Edgo Jackson Pinto; Leitão, Mário de Miranda Vilas Boas Ramos; Rocha, Ruy de Carvalho; Gonçalves, Iris Santana; Silva, Rodrigo Rafael da

doi:10.15809/irriga.2017v1n1p21-30

Cited by 5 publications

(6 citation statements)

References 8 publications

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“…Regarding temperature, there were no inportant variations in maximum, mean, and minimum temperatures between environments (Table I). According to Reis, Souza and Azevedo (2009), Oliveira et al (2017), the cultivation of tomatoes in a protected environment has several advantages, among them, the reduction in the incidence of solar radiation, the wind speed and, consequently, the reduction of evapotranspiration. However, one of the factors that change most would be solar radiation, which is associated with surface water evaporation.…”

Section: Resultsmentioning

confidence: 99%

Physiological indexes of mini tomato cultivars grown in a protected environment

et al. 2020

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Shading screens are widely used to control excessive solar radiation, thereby changing plant growth. Thus, through physiological indices the objective was to evaluate the growth of three cultivars of minitomatoes under colored meshes. The experiment was conducted from April to July in the DTCS / UNEB experimental field in experiment DBC with subdivided plots, and four replicates, comprised of three shaded environments and the control treatment, three cultivars, and seven plant sampling seasons. For growth analysis, we used the destructive method, total dry matter was determined after drying it in an oven at 65°C. The total leaf area (LAI) was obtained using the software QUANT. Results showed that there was no interaction between environments and the other factors. Regarding leaf area index, cvs. Shani and Sweet Million stood out in all environments, whereas cv. Red Sugar had a similar behavior in all environments. Shani obtained the best indices in open sun environment and in the environment covered with red shading screen, and Sweet Million obtained the best index under gray shading screen. Red Sugar had the lowest LAI, and consequently, the lowest SLA and LAR. On the other hand, it showed the highest RPF, since it obtained the highest dry matter in leaves compared to the other cultivars. Cvs. Shani and Sweet Million showed the best: TAL, TCR, TCA and TCC.

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Section: Resultsmentioning

confidence: 99%

Physiological indexes of mini tomato cultivars grown in a protected environment

et al. 2020

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“…Within the greenhouse, due to the diffusivity of the cover and the conditions of temperature, air relative humidity and the reduction of winds, the evapotranspiration tends to reduce (REIS;SOUZA;AZEVEDO, 2009;GUISELINI et al, 2010;OLIVEIRA et al, 2014). Oliveira et al (2017) when evaluating the reference evapotranspiration in a protected environment through a Class A tank (TCA) and a meteorological station installed in the area, correlated with the ETo of the external environment calculated by different estimation methods, verified that the ETo of the covered area corresponded to 77.8; 75.0 and 82.4% of the ETo obtained by the Penman-Monteith methods, TCA and Jensen and Haise, respectively; and 105 and 131.3% of the ETo obtained by the methods of Hargreaves and Samani and Makkink, respectively. Reis et al (2012) stated that agricultural cultivation in greenhouses allows protection of plants against high temperatures and higher intensity of solar radiation, during all its growth, thus reducing evapotranspiration.…”

Section: Resultsmentioning

confidence: 99%

“…Reis et al (2012) stated that agricultural cultivation in greenhouses allows protection of plants against high temperatures and higher intensity of solar radiation, during all its growth, thus reducing evapotranspiration. According to Oliveira et al (2017), protected environments provide micrometeorological modifications in relation to the external environment, favoring the processes of reflection and absorption of the solar rays and consequently, reduction of solar radiation. Figure 4 shows the crop evapotranspiration behavior estimated by an Irrigameter (4A), Radiation (4B) and Blaney-Criddle (4C), compared to the Penman-Monteith -FAO 56 method, within three days.…”

Section: Resultsmentioning

confidence: 99%

“…The adoption of protected cultivation has expanded rapidly across the world (SILVA; SILVA; PAGIUCA, 2014). Rebouças et al (2015) reported that in the 1990s, global estimates indicated that greenhouses occupied an area of 716 thousand hectares; as early as 2010, there were 3.7 million hectares of plants grown under greenhouse conditions, most of which consisted of vegetables.…”

Section: Introductionmentioning

confidence: 99%

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Irrigameter Use for Estimating Crop Evapotranspiration in Protected Environment

et al. 2019

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In the face of climatic adversities associated with water lacking for irrigation, crop cultivation in greenhouses in Brazil has increased significantly, thereby demanding research that makes it possible to estimate crop water demand when grown in these environments. Therefore, the objective of this study was to evaluate the performance of Irrigameters to estimate the evapotranspiration of cowpea grown in protected environment. The experiment was conducted in the experimental area of the State University of Southwest of Bahia (UESB) under protected environment and the cowpea variety used was BRS Guariba. For this study, two Irrigameters were installed for the direct estimation of the daily crop evapotranspiration. Likewise, with the use of an automatic weather, the meteorological data were collected and the crop evapotranspiration (ETc) was estimated using the Kc values recommended for different phases of the crop. The data collected by the Irrigameter were compared with the data estimated by the Penman-Monteith method, as well as with Radiation and Blaney Criddle methods at one-, two- and three-day intervals. The results show that all the methods were efficient and accurate at estimating ETc at all studied intervals.

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“…A estimativa da evapotranspiração de referência foi calculada através do Método de Penman-Monteith parametrizada pela FAO, utilizado em diversos estudos (MINUZZI et al, 2014;MORAIS et al, 2015;OLIVEIRA et al, 2017;SILVA et al, 2016;) tendo como referência uma superfície gramada, conforme a Equação 1.…”

Section: Materias E Métodosunclassified

Evapotranspiração De Referência Pelo Método De Penman-Monteith Em Anos De Enos Para Microrregião De Pelotas-Rs

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EVAPOTRANSPIRAÇÃO DE REFERÊNCIA PELO MÉTODO DE PENMAN-MONTEITH EM ANOS DE ENOS PARA MICRORREGIÃO DE PELOTAS-RS LUKAS DOS SANTOS BOEIRA¹; MICHAELA BÁRBARA NETO²; LÚCIO DE ARAÚJO NEVES3; VIVIANE SANTOS SILVA TERRA4 E GILBERTO LOGUERCIO COLLARES4 1Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Rua Gomes Carneiro, n° 1, Balsa, 96010-610, Pelotas, Rio Grande do Sul, Brasil, lukasdossantosboeira@gmail.com 2Departamento de Engenharia de Biossistemas, Universidade de São Paulo, Escola Superior de Agricultura “Luiz de Queiroz”, Av. Pádua Dias, 11, Caixa Postal 09, 13416-000, Piracicaba, São Paulo, Brasil, michaela.neto@usp.br 3Departamento de Solos, Instituto Federal Sul-Rio-Grandense, Campus Pelotas - Visconde da Graça, Avenida Engenheiro Ildefonso Simões Lopes, Três Vendas, 96060-290, Pelotas, Rio Grande do Sul, Brasil, lneves51@gmail.com 4Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Rua Gomes Carneiro, n° 1, Balsa, 96010-610, Pelotas, Rio Grande do Sul, Brasil, vssterra10@gmail.com; gilbertocollares@gmail.com 1 RESUMO A Microrregião de Pelotas, localizada no Sudeste do Rio Grande do Sul é uma das maiores produtoras de arroz irrigado do Brasil. A produção de arroz na região é realizada através do sistema de irrigação por inundação. Um dos fatores que influência na altura da lâmina d'água no sistema é a evapotranspiração, a qual está diretamente relacionada aos elementos e fenômenos climáticos. O El Niño Oscilação Sul (ENOS) é um dos principais fenômenos climáticos na região. O objetivo do estudo foi avaliar se a evapotranspiração de referência (ET0) é afetada pelos períodos de ENOS na Microrregião de Pelotas-RS. Para isso, foram utilizados quarenta anos de dados climáticos diários na estimativa da ET0, pelo método de Penman-Monteith, parametrizado pela FAO, sendo confrontados com a classificação do NOAA, para o fenômeno ENOS. Os resultados mostram que a região possui em média uma ET0 de 4,82 mm dia-1, sendo para os períodos de El Niño 4,71 mm dia-1, La Niña 4,89 mm dia-1 e Neutros de 4,87 mm dia-1. A partir da análise da variância e do teste de comparação de médias DMS de Fisher, foi verificado que o ENOS exerce influência significativa na ET0 da região nos meses de novembro e dezembro. Palavras-chave: variáveis climatológicas, El Niño, La Niña, Neutros, arroz irrigado. BOEIRA, L. S.; NETO, M. B.; NEVES, L. A.; TERRA, V. S. S.; COLLARES, G. L. REFERENCE EVAPOTRANSPIRATION BY THE PENMAN-MONTEITH’S METHOD IN YEARS OF ENSO FOR THE MICROREGION OF PELOTAS-RS. 2 ABSTRACT The Micro-zone of Pelotas, located in the southeast of 'Rio Grande do Sul' is one of the major producers of irrigated rice in Brazil. Rice production in the region is performed through the flood irrigation system. One of the factors that influence the depth of water into the system is evapotranspiration, which is directly related to elements and climatic phenomena. The El Niño-Southern Oscillation (ENSO) is one of the main climatic phenomena in the region. The study aimed to assess whether the reference evapotranspiration (ET0) is affected by the ENSO's periods in the Microregion of Pelotas-RS. For such, forty years of daily climatic data were used to estimate ET0 by applying Penman-Monteith's method parameterized by FAO, then the results were confronted to NOAA's classification for the ENSO's phenomenon. The results showed that the region has an evapotranspiration average of 4.82 mm day-1 and for El Niño's periods 4.71 mm day-1, La Niña's 4.89 mm day-1 and Neutral of 4.87 mm day-1. From the variance analysis and the test of average comparison LSD by Fisher, it was noted that ENOS has significant influence on the region's ET0 in November and December. Keywords: climatological variables, El Niño, La Niña, Neutral, irrigated rice.

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Estimativa Da Evapotranspiração De Referência Para Ambiente Protegido

Cited by 5 publications

References 8 publications

Physiological indexes of mini tomato cultivars grown in a protected environment

Physiological indexes of mini tomato cultivars grown in a protected environment

Irrigameter Use for Estimating Crop Evapotranspiration in Protected Environment

Evapotranspiração De Referência Pelo Método De Penman-Monteith Em Anos De Enos Para Microrregião De Pelotas-Rs

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