Eficiência de conversão da radiação fotossinteticamente ativa interceptada em fitomassa de mudas de eucalipto

Caron, Bráulio Otomar; Souza, Velci Queiróz de; Trevisan, Rômulo; Behling, Alexandre; Schmidt, Denise; Bamberg, Rogério; Eloy, Élder

doi:10.1590/s0100-67622012000500005

Cited by 25 publications

(46 citation statements)

References 19 publications

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“…Entretanto, o ganho de massa não pode ser atribuído apenas à AF, mas também à capacidade de aproveitamento da energia luminosa, que envolve, sobretudo o mecanismo de fixação de carbono, que é o responsável principal por governar o crescimento e o desenvolvimento vegetal (Caron et al, 2012).…”

Section: Resultsunclassified

Análise de crescimento em cultivares de alface nas condições do sul do Piauí

et al. 2016

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Análise de crescimento em cultivares de alface nas condições do sul do PiauíObjetivou-se, com este trabalho, avaliar o crescimento de quatro cultivares de alface, nas condições do sul do Piauí, para recomendar os melhores para a região. O experimento foi realizado em casa de vegetação, em blocos casualizados, com avaliação em parcelas subdivididas no tempo, avaliadas em seis épocas (20, 24, 28, 32, 36, Growth analysis in lettuce cultivars in Southern PiauíThe aim of this study was to evaluate the growth and recommend the best one (s) of four lettuce cultivars in Southern Piaui. The experiment was carried out in a greenhouse with a randomized block design, with split-plot in time evaluation (20, 24, 28, 32, 36, 40 days after sowing -DAS), and the corresponding treatments to four cultivars (Americana Rafaela ® , Grand Rapids TBR ® , Crespa Repolhuda ® and Repolhuda todo ano ® ) with five replications. We evaluated leaf area; leaf number; stem diameter; shoot fresh mass; shoot, root and total dry mass and physiological indexes of growth analysis. The cultivars showed significant effect in the studied parameters. Under the submitted conditions, the Americana Rafaela ® and Repolhuda todo ano ® lettuce cultivars showed better performance and greater morphological and physiological indexes. The cultivars Americana Rafaela ® and Repolhuda todo ano ® can be grown under Southern Piaui conditions.

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Section: Resultsunclassified

Análise de crescimento em cultivares de alface nas condições do sul do Piauí

et al. 2016

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“…Caron et al (2012) observed that increasing the density of Eucalyptus grandis seedlings increased the use efficiency of radiation by 44%.…”

Section: Use Efficiency Of Solar Radiation Is Influenced By Density Omentioning

confidence: 99%

“…In the seedlings cultivated in greenhouses, water supply and nutrients are not limiting factors due to the possibility of control for these elements; thus, biomass production is controlled by solar radiation, which was observed and proposed by Caron et al (2012). So, the growth of Hovenia dulcis seedlings is influenced by the amount of photosynthetically active radiation intercepted, in the utilization efficiency of the energy in the photosynthetic process and the seedling density in the tray.…”

Section: Partitioning Of Assimilates Produced By Plantsmentioning

confidence: 99%

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The high density of plants increases the radiation use efficiency of photosynthetically active seedlings of Japanese grape (Hovenia dulcis)

Schwerz¹,

Caron²,

Elli³

et al. 2017

Aust J Crop Sci

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The objective of this study was to determine the use efficiency intercepted photosynthetically active solar radiation of Hovenia dulcis seedlings grown under different plant density treatments. The experiment was conducted in a greenhouse at the forestry nursery. A complete randomized block design was applied. The study was characterized by two plant densities; high (494 plants m -2 ) and medium (247 plants m -2 ) densities of seedling in the trays, and fifteen evaluation periods that began after first emergence. Evaluations were carried out every 15 days, totaling 210 days, with six replications. The leaf area index, total dry biomass of seedlings, partitioning of dry biomass, interception of global radiation, accumulated intercepted photosynthetically active radiation, and use efficiency of radiation were evaluated. The high density treatments promoted greater use efficiency and accumulation of intercepted photosynthetically active radiation in dry biomass of Hovenia dulcis seedlings. In this work, a model is present for analyzing the growth and development of plants and their relation to both photosynthetic rate and radiation use efficiency.

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“…A área foliar foi obtida através do uso do seguinte modelo proposto por Caron et al (2012): AF = (c 1 x l 1 ) x 0,7226 x nfp + (c 2 x l 2 ) x 0,7226 x nfm + (c 3 x l 3 ) x 0,7226 x nfg Em que: AF = área foliar, em cm²; c 1 = comprimento mediano da folha de tamanho pequeno, em cm; c 2 = comprimento mediano da folha de tamanho médio, em cm; c 3 = comprimento mediano da folha de tamanho grande, em cm; l 1 = largura mediana da folha de tamanho pequeno, em cm; l 2 = largura mediana da folha de tamanho médio, em cm; l 3 = largura mediana da folha de tamanho grande, em cm; nfp = número total de folhas pequenas (até 2,5 cm de comprimento); nfm = número total de folhas médias (de 2,6 a 5 cm de comprimento); nfg = número total de folhas grandes (maior que 5 cm de comprimento); e 0,7226 = fator de correção do retângulo (comprimento x largura da folha).…”

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AVALIAÇÃO DA QUALIDADE DE MUDAS DE Eucalyptus grandis UTILIZANDO PARÂMETROS MORFOLÓGICOS

Eloy¹,

Caron²,

Schmidt³

et al. 2013

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Resumo AbstractQuality assessment of Eucalyptus grandis seedlings using morphological parameters. The present work had as objective determines the index of Dickson's quality (IDQ) and its relation to the morphologic variables in Eucalyptus grandis W. Hill ex Maiden seedlings produced in different treatments. The experiment was driven in the agronomic nursery of the Center of Superior Education North of Rio Grande do Sul (CESNORS), in experimental design of randomized complete block. Four treatments were tested, that involved two volumes sizes (50 and 90 cm³) and two levels of density of plants in the tray. It evaluated height of the aerial part, diameter of the lap, mass dries of leaves, mass dries of the stem, mass dries of the aerial part, mass dries of root, mass total drought (MST), foliar area (AF) and the index of Dickson's quality (IDQ). The size of the containers and the density of the seedlings in the tray had significant influence in growth of the seedlings along the time, putting limits to the volume of exploitable substratum and generating competition for space by the plants. All the appraised variables correlated significantly and IDQ revealed high index with MST. The treatments with container of volume 90 cm³ were the ones that presented the best IQD, resulting in seedlings of good quality capable to support the adverse conditions of the field.

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Eficiência de conversão da radiação fotossinteticamente ativa interceptada em fitomassa de mudas de eucalipto

Cited by 25 publications

References 19 publications

Análise de crescimento em cultivares de alface nas condições do sul do Piauí

Análise de crescimento em cultivares de alface nas condições do sul do Piauí

The high density of plants increases the radiation use efficiency of photosynthetically active seedlings of Japanese grape (Hovenia dulcis)

AVALIAÇÃO DA QUALIDADE DE MUDAS DE Eucalyptus grandis UTILIZANDO PARÂMETROS MORFOLÓGICOS

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