Alterações na temperatura do ar mediante telas nas laterais de ambientes protegidos cultivados com tomateiro

Duarte, Larissa A; Schöffel, Edgar Ricardo; Mendez, Marta Elena Gonzalez; Schallenberger, E.

doi:10.1590/s1415-43662011000200006

Cited by 14 publications

(11 citation statements)

References 8 publications

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“…Guida et al (2017), when submitting tomato plants to a water stress, observed that the soil matricidal potential below -28 kPa promotes a reduction in the stomatal conductance, affecting the crop yield. Analyzing the climatic conditions in the greenhouse, it was found that the average temperature was 23.4°C, which is close to the ideal temperature (18°-24°C), for the tomato crop, according to Duarte et al (2011). The mean relative humidity of the period was 60.3%, presenting a variation of 33.5-86.4%.…”

Section: Resultsmentioning

confidence: 66%

Gas exchanges and water use efficiency in the selection of tomato genotypes tolerant to water stress

et al. 2017

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Water stress can affect the yield in tomato crops and, despite this, there are few types of research aiming to select tomato genotypes resistant to the water stress using physiological parameters. This experiment aimed to study the variables that are related to the gas exchanges and the efficiency in water use, in the selection of tomato genotypes tolerant to water stress. It was done in a greenhouse, measuring 7 x 21 m, in a randomized complete block design, with four replications (blocks), being five genotypes in the FBC generation, which were previously obtained from an interspecific cross between Solanum pennellii versus S. lycopersicum and three check treatments, two susceptible [UFU-22 (pre-commercial line) and cultivar Santa Clara] and one resistant (S. pennellii). At the beginning of flowering, the plants were submitted to a water stress condition, through irrigation suspension. After that CO assimilation, internal CO, stomatal conductance, transpiration, leaf temperature, instantaneous water use efficiency, intrinsic efficiency of water use, instantaneous carboxylation efficiency, chlorophyll a and b, and the potential leaf water (Ψf) were observed. Almost all variables that were analyzed, except CO assimilation and instantaneous carboxylation efficiency, demonstrated the superiority of the wild accession, S. pennellii, concerning the susceptible check treatments. The high photosynthetic rate and the low stomatal conductance and transpiration, presented by the UFU22/FBC#2 population, allowed a better water use efficiency. Because of that, these physiological characteristics are promising in the selection of tomato genotypes tolerant to water stress.

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Section: Resultsmentioning

confidence: 66%

Gas exchanges and water use efficiency in the selection of tomato genotypes tolerant to water stress

et al. 2017

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“…However, mean and maximum air temperatures remained within the range considered as adequate for the crop (22 to 30 ºC) in all production environments. Duarte et al (2011), evaluating alterations in air temperature due to the use of screens on the sides of protected environments cultivated with tomato, observed that environments covered with transparent plastic (low-density polyethylene -LDPE) during autumn-winter and side covering with anti-aphid screen promoted thermal gain to the environment.…”

Section: Resultsmentioning

confidence: 99%

Mini tomato production in organic system under greenhouse with partial control of meteorological elements

Araújo

Leal

Zorzeto

et al. 2016

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThe objective of this research was to evaluate the meteorological elements of the environments and the production components of mini tomato crop in organic system in different forms of cultivation, biofertilizer doses and technological levels of protected environments. The research was conducted in completely randomized design in a 3 x 2 x 5 factorial scheme, corresponding to three greenhouses (A -climatized, B -mobile screen and C -fixed screen), two forms of cultivation (pots and beds) and five doses of a commercial biofertilizer (0, 50, 100, 150 and 200% of dose indicated), with five replicates. The treatments affected the analyzed variables, except for biofertilizer doses and interaction of treatments. Air temperature was unchanged among the environments and the mean and minimum relative humidity were within the control range in the climatized greenhouse. The greenhouse with mobile screen showed the best production results for the cultivation in beds and the biofertilizer doses were indifferent for all treatments.Produção de minitomate em sistema orgânico sob ambientes protegidos com controle parcial de elementos meteorológicos R E S U M O Objetivou-se, nesta pesquisa, avaliar os elementos meteorológicos dos ambientes e os componentes de produção da cultura do tomateiro minitomate, em sistema orgânico de produção em diferentes formas de cultivo, doses de biofertilizante e graus tecnológicos de ambientes protegidos. A pesquisa foi conduzida em delineamento inteiramente casualizado em esquema fatorial 3 x 2 x 5 constituído de três casas de vegetação (A -climatizada, B -tela móvel e C -tela fixa) duas formas de cultivo (vasos e canteiros) e cinco doses de biofertilizante comercial (0, 50, 100, 150 e 200% da dose indicada pelo fabricante) com cinco repetições. Os tratamentos influenciaram as variáveis analisadas, exceto para as doses de biofertilizante e interação dos tratamentos. A temperatura do ar se manteve inalterada entre os ambientes e a umidade relativa média e mínima dentro da faixa de controle na casa de vegetação climatizada. A casa de vegetação com tela móvel apresentou os melhores resultados produtivos na forma de cultivo em canteiros ficando as doses de biofertilizante indiferentes a todos os tratamentos.

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“…Nas atividades agrícolas, a temperatura pode ser decisiva para o conforto térmico dos animais, para a escolha do tipo de cultura a ser adotada, na propagação de vírus e fungos e no seu crescimento e desenvolvimento (Duarte et al, 2011). A amplitude térmica diária pode vim afetar de modo negativo as culturas agrícolas, pois são fatores críticos sobre a taxa de crescimento e desenvolvimento (Segovia et al, 1997;Hoch et al, 2008) e produtividade das plantas, visto como valores extremos, durante a fase reprodutiva podem ocasionar esterilidade de grãos (Buriol et al, 2000;Kuinchtner et al, 2007).…”

Section: Introductionunclassified

Tendência climática das temperaturas do ar no município de Bom Jesus do Piauí, Brasil

Medeiros

Cavalcanti²

2020

RSD

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Several surveys carried out at the beginning of the 21st century have been showing intense indications of climate trends, on the global, regional and local scales. In this context, the objective is to analyze the thermal and annual thermal trends of maximum and minimum temperatures in Bom Jesus do Piauí, between the years (1960-2018), and to discuss their possible causes. Maximum and minimum air temperature (ºC) data acquired from the National Institute of Meteorology were used. For the data series, monthly averages and annual and seasonal totals corresponding to the summer, autumn, winter and spring seasons were calculated. The results made it possible to delimit the climatic behavior in the studied area, providing delimitations of a hot and / or cold period, serving as an alert to the authorities and decision makers, for a better agricultural and agribusiness planning. The fluctuations in temperatures are due to the synoptic systems operating at the time of the rainy and dry periods, as well as the impacts on the environment and the actions of the large-scale transient synoptic systems and their local and regional scale. These climatic trends were observed on a regional and local scale and were observed in the studied municipality. The temporal characterization, on a monthly and annual scale, generated simulated values very close to the observed values, a fact confirmed by statistical indices of satisfactory performance.

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Alterações na temperatura do ar mediante telas nas laterais de ambientes protegidos cultivados com tomateiro

Cited by 14 publications

References 8 publications

Gas exchanges and water use efficiency in the selection of tomato genotypes tolerant to water stress

Gas exchanges and water use efficiency in the selection of tomato genotypes tolerant to water stress

Mini tomato production in organic system under greenhouse with partial control of meteorological elements

Tendência climática das temperaturas do ar no município de Bom Jesus do Piauí, Brasil

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