Épocas de plantio e doses de silício no rendimento de alface tipo americana

Resende, G. M. de; Yuri, J. E.; Souza, Rovilson José de

doi:10.1590/s0102-05362007000300026

Cited by 20 publications

(16 citation statements)

References 8 publications

(1 reference statement)

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“…Similar results were found by Resende et al (2007) who observed positive responses with Si spraying in crisphead lettuce, where an increase in commercial and total values on fresh matter was found. The silicon application on different varieties of plants has shown to improve the productivity and quality of vegetable because it provides nutrients to the vegetables, greater turgidity to the leaves, due to less water loss by the plant, since this nutrient tends to accumulate in the leaf epidermis serving as a barrier to water loss through transpiration by the plant (Barker and Pilbeam, 2007).…”

Section: Resultssupporting

confidence: 88%

Silicon in the turgidity maintenance of American lettuce

Mattiuz¹,

Filho²,

Muniz³

et al. 2015

Afr. J. Agric. Res.

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This study aimed to verify the influence of silicon application in hydroponics lettuce cv Lucy Brown, on post-harvest under refrigeration. In hydroponic production silicon was used in the doses of 0, 28, 56 and 84 mg L -1 of potassium silicate. Lettuces were harvested early in the morning and immediately transported to UNESP, campus of Jaboticabal. Upon being received at the laboratory the plants were standardized in size and appearance, removing the three older leaves. The plants were placed in polystyrene trays (Styrofoam © ) and packaged under the temperature at 8±2°C and 80 ± 3% relative humidity. The experimental design was completely randomized with three replications, and two plants per repetition. The fresh matter of shoots was analyzed together with the silicon content in the leaves, the firmness, the fresh matter loss, titratable acidity, pH and enzyme activity of polyphenoloxidize and peroxides. The evaluations were performed every four days, for a total of 16 days of storage. The concentration of 84 mg L -1 silicon increased the fresh matter of the plant at harvest and post-harvest, provided less water loss and consequently greater firmness in the leaves during the storage period for lettuce at 8±2°C for 16 days.

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Section: Resultssupporting

confidence: 88%

Silicon in the turgidity maintenance of American lettuce

Mattiuz¹,

Filho²,

Muniz³

et al. 2015

Afr. J. Agric. Res.

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“…Esse destaque se deve, principalmente, às características apresentadas por este grupo, que se diferencia dos demais por apresentar folhas externas de coloração verde-escura, folhas internas de coloração amarela ou branca, imbricadas, semelhantes ao repolho e crocantes, além de apresentar maior duração pós-colheita, possibilitando o transporte a longas distâncias principalmente, as redes de fast foods (Yuri et al, 2002a). Tem-se constatado maior demanda dessa alface e aceitação pelo mercado consumidor brasileiro, na forma de salada (Resende et al, 2007;Sala & Costa, 2012). Nos Estados Unidos, esse grupo de alface denominado crisphead lettuce, é considerado o mais importante dentre as hortaliças para ser consumido em forma de saladas cruas, tendo um consumo per capita superior a 11,3 kg/ano (Sanders, 2016).…”

Section: Grower's Pageunclassified

Desempenho agronômico de genótipos de alface americana no Submédio do Vale do São Francisco

et al. 2017

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Agronomic performance of crisphead lettuce genotypes at Sub-Middle São Francisco ValleyAmong the types of lettuce currently cultivated, crisphead lettuce has exceeded, which aims to serve mainly the networks of fast food. In order to evaluate the productive behavior of lettuce cultivars in Sub-Middle of São Francisco Valley, Pernambuco State, Brazil, two experiments were carried out, in 2013 and 2014. Randomized blocks with twelve genotypes in 2013 and twenty-two genotypes in 2014, with three replications, were evaluated. Total and commercial production per plant; total and commercial productivity; circumference of the commercial "head" and stem length in each year of cultivation were obtained. On both experiments the cultivars were evaluated through joint analysis. For the 2013 crop, total production and productivity showed significant differences between treatments, wherein Havassu (940 g/plant and 78.3 t/ha), Perovana (922 g/plant and 76.8 t/ha), Laurel (903 g/plant and 75.2 t/ha) and Balsamo (875 g/ plant and 72.8 t/ha) were the genotypes that exceeded. In 2014, fresh mass and total productivity ranged between 526 and 816 g/plant and 43.8 and 67.9 t/ha, Laurel (816 g/plant and 67.9 t/ha) and Silvana (809 g/plant and 67.4 t/ha) presenting the best results, with no difference among them. For joint analysis, every evaluated characteristic was significantly affected by the interaction between the factors, year and cultivars. We concluded that the cultivation of crisphead lettuce is viable in the region. The cultivars Ironwood, Havassu, Laurel, Flora, Perovana, Raider Plus, Balsamo and Silvana are the most indicated.

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“…Despite the proven effects of Si on the mentioned metabolic processes, little information on its effects on traits related to post-harvest quality can be found. Resende et al (2007) showed that foliar application of Si reduced oxidation in the outer leaves of lettuce, causing the formation of compact "heads", with a higher retention of the green coloration, compared to the control (without Si). Concerning tomato, Stamatakis et al (2003a) observed an increase in concentration of soluble solids, vitamin C, lycopene and fruit firmness by adding Si to the nutrient solution.…”

Section: Palavras-chavementioning

confidence: 99%

Tomato post-harvest durability and physicochemical quality depending on silicon sources and doses

et al. 2016

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This study aimed to investigate the effect of silicon (Si) sources and doses on the physicochemical quality as well as post-harvest conservation of tomato fruits. Treatments were arranged in a 3 x 5 factorial scheme corresponding to sources [calcium silicate, potassium silicate and sodium silicate] and five doses of Si (equivalent to 0, 100, 200, 400 and 800 kg/ha SiO 2 ). Randomized blocks were the experimental design, with four replications. Soluble solids, vitamin C, lycopene, titratable acidity, mature fruit firmness, initial firmness, firmness half-life, time until reaching firmness equivalent to 3.0 x 10 4 N/m 2 and 2.0 x 10 4 N/m 2 and Si content in fruits were evaluated. Soluble solids, vitamin C and lycopene of fruits increased with increasing doses of Si, except for the highest dose. Calcium and sodium silicate provided the highest lycopene concentration in fruits. An increase in initial firmness, number of days until reaching firmness half-life and firmness equivalent to 3.0 and 2.0 x 10 4 N/m 2 were observed along with increasing doses of Si. Tomato fertilization with calcium silicate, potassium silicate and sodium silicate, used as sources of Si, increased the post-harvest conservation as well as the physicochemical quality of tomato.

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Épocas de plantio e doses de silício no rendimento de alface tipo americana

Cited by 20 publications

References 8 publications

Silicon in the turgidity maintenance of American lettuce

Silicon in the turgidity maintenance of American lettuce

Desempenho agronômico de genótipos de alface americana no Submédio do Vale do São Francisco

Tomato post-harvest durability and physicochemical quality depending on silicon sources and doses

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