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Manejo da cobertura de ambientes protegidos: radiação solar e seus efeitos na produção da gérbera AGRIAMBI
Guiselini,Cristiane; Sentelhas,Paulo C.; Pandorfi,Héliton; Holcman,Ester.
Este trabalho propôs avaliar a influência das malhas de sombreamento (termorrefletora) instaladas externa e internamente em ambiente protegido coberto com polietileno de baixa densidade (PEBD), cultivado com gérbera, na radiação solar global (Qg) e nos parâmetros da planta: crescimento, desenvolvimento e qualidade da gérbera. O experimento foi conduzido em dois ciclos no ano de 2004, na ESALQ/USP, em Piracicaba, SP, em ambiente protegido, dividido em dois módulos de produção. Os ambientes foram diferenciados um do outro pela instalação da malha termorrefletora (50%): malha externa (ambiente 1 - A1) e malha interna (ambiente 2 - A2). Nesses ambientes, os resultados dos dois ciclos mostraram alteração na Qg; nos ambientes A1 e A2 as Qg foram respectivamente...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Malha de sombreamento termorrefletora; Plasticultura; Gerbera jamesonii.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662010000600011
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Microclimate under different shading screens in greenhouses cultivated with bromeliads AGRIAMBI
Holcman,Ester; Sentelhas,Paulo C..
This study had as its objective the evaluation of the influence of shading screens of different colors on the different microclimate variables in a greenhouse covered with transparent low-density polyethylene (LDPE). The experiment was conducted with five treatments: thermo-reflective screen (T1); a control - without screen (T2); red screen (T3); blue screen (T4); and black screen (T5), all of them with 70% of shading. An automatic micrometeorological station was installed in each treatment, measuring air temperature (T), relative humidity (RH), incoming solar radiation (Rg), photosynthetically active radiation (PAR) and net radiation (Rn) continuously. The control (T2) and red screen (T3) treatments promoted the highest solar radiation transmissivity,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Solar radiation; Air temperature; Protected crops.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662012000800007
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Bromeliads production in greenhouses associated to different shading screens Horticultura Brasileira
Holcman,Ester; Sentelhas,Paulo Cesar.
Bromeliads production in greenhouses is highly influenced by microclimate, which affects plants growth and development. Based on that, this study aimed to evaluate the influence of shading screens of different colors on microclimatic variables and Aechmea fasciata bromeliad growth in a greenhouse covered by transparent low-density polyethylene. The experiment had five treatments, with screens of different colors, inside a plastic greenhouse: thermo-reflective (T1); control without screen (T2); red (T3); blue (T4); and black (T5) screens, all of them with 70% of shading. From the 60 plants arranged in each one of the treatments 24 were evaluated, which were obtained randomly. The statistical design was completely randomized for the biometric variables. An...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aechmea fasciata; Plant growth; Solar radiation; Air temperature.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362013000300008
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Cherry tomato yield in greenhouses with different plastic covers Ciência Rural
Holcman,Ester; Sentelhas,Paulo Cesar; Mello,Simone da Costa.
ABSTRACT: The objective of the present study was to evaluate the influence of different plastic covers on microclimate and cherry tomato yield in greenhouses. The experiments were carried out in Piracicaba, state of São Paulo (Brazil), during three growing periods (2008/2009/2010). A greenhouse was divided in: Environment I (EI) - covered with plastic film anti-UV and thermo-reflective shading screen, and Environment II (EII) - covered with diffusive plastic film; monitored with automatic weather sensors; and cultivated with cherry tomato (‘Sweet Grape’ and ‘Sweet Million’). Use of diffusive plastic in greenhouses provides a better inside distribution of solar energy without causing major changes in air temperature and relative humidity, resulting in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: ‘Sweet Grape’; ‘Sweet Million’; Diffusive plastic; Solar radiation.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017001000204
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