Production of iceberg lettuce using mulches

Verdial, Marcelo Fontanetti; Lima, Márcio Santos; Morgor, Átila F.; Goto, Rumy

doi:10.1590/s0103-90162001000400014

Cited by 20 publications

(15 citation statements)

References 3 publications

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“…According to Herencia et al (2011) and Kleiber et al (2013), in less favorable conditions during autumn, synthesis of N-poor molecules (e.g., polyphenols, cellulose, starch) may increase dry matter content. A significant correlation between higher dry matter content and increased amount of macro-and micronutrients in lettuce was observed by Fontanetti et al (2001) and Koudela and Petříková (2008). In our study, the strongest accumulation in lettuce leaves was obtained for polyphenols, calcium, and nitrates (Table 2).…”

Section: Resultssupporting

confidence: 62%

The Effect of Plant Growth Promoting Bacteria on Transplants Growth and Lettuce Yield in Organic Production

Szczech

Szafirowska

Kowalczyk

et al. 2016

Journal of Horticultural Research

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Application of beneficial bacterial strain B125 (Enterobacter sp.) and strain PZ9 (Bacillus sp.) in lettuce transplants production significantly enhanced seed germination and plant biomass. The best effect was obtained when the mixture of B125 and PZ9 was used. Combined application of these bacteria significantly increased transplants biomass, which was about 45% higher than that in the control. However, after planting these transplants in organic field, generally, there were no differences in yield and nutrient content in plants treated and not treated with the bacteria, except for nitrogen and vitamin C. The lettuce grown from transplants treated with bacterial mixture B125 + PZ9 contained significantly higher nitrogen than plants from other treatments. Opposite to nitrogen, bacterial applications decreased the amount of vitamin C. The growth and organic lettuce composition was affected by planting time. The yield was higher in spring, but the concentration of nutrients in these plants was lower than that in plants harvested in autumn. Climatic and light conditions in the late season were the reasons for increased dry matter content, minerals, phenolic compounds, and vitamin C, as well as high concentration of nitrates.

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Section: Resultssupporting

confidence: 62%

The Effect of Plant Growth Promoting Bacteria on Transplants Growth and Lettuce Yield in Organic Production

Szczech

Szafirowska

Kowalczyk

et al. 2016

Journal of Horticultural Research

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“…Verdial et al (2001), avaliando diferentes tipos de cobertura do solo na produção de alface, observaram temperatura do solo mais elevada sob cobertura com polietileno preto quando comparada com cobertura vegetal morta. Em experimento conduzido por Moura Filho et al (2009), o filme de polietileno promoveu o aquecimento do solo, com aumento de 1 ºC em relação ao tratamento sem cobertura e de até 4,0 °C em tratamentos com cobertura morta de capim-elefante.…”

Section: Resultsunclassified

Crescimento e produtividade de alface sob diferentes tipos de cobertura do solo

Meneses

Moreira

Souza

et al. 2016

AGRO@MBIENTE ON-LINE

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Resumo:No Brasil, a alface é a principal hortaliça produzida e comercializada, carecendo, contudo, de tecnologias para otimizar a produção e garantir a sustentabilidade ambiental em áreas agrícolas. Objetivou-se com este trabalho verificar o efeito de diferentes coberturas do solo no crescimento, produtividade de plantas de alface e na temperatura do solo. O delineamento experimental utilizado foi em blocos casualizados, com seis tratamentos e cinco repetições. Os tratamentos estudados consistiram de tipos de cobertura do solo, sendo: cobertura com material vegetal (CVe), polietileno preto (0,020 mm) (PPt), polietileno prata (0,020 mm) (PPr), polietileno branco (0,020 mm) (PBr), polietileno transparente (0,100 mm) (PTr) e solo sem cobertura (Testemunha -T). As variáveis analisadas foram: massa fresca total, número e massa fresca de folhas comerciais, massa fresca de raiz, diâmetro da cabeça e produtividade. Foi realizado o monitoramento da temperatura do solo durante toda condução da cultura. As coberturas com polietilenos prata, branco e preto foram estatisticamente iguais e superiores às demais coberturas para todas as características agronômicas avaliadas na alface. A temperatura do solo foi influenciada pelos tipos de cobertura. Em relação ao solo descoberto, a temperatura do solo aumentou nos tratamentos com coberturas plásticas, e diminuiu no tratamento com cobertura vegetal morta. Palavras-chave: Lactuca sativa L.. Mulching. Temperatura do solo.Abstract: In Brazil, the lettuce is the main vegetable produced and marketed, however, the crop is deficient in technology to optimize production and to ensure environmental sustainability in agricultural areas. This study aimed to verify the effect of different soil covering on soil temperature, and lettuce growth and yield. The experiment was settled adopting a randomized block design with six treatments consisted by different types of soil covering: cover with organic matter (CVe), black polyethylene (0.020 mm) (PPt), silver polyethylene (0.020 mm) (PPr), white polyethylene (0.020 mm) (PBr), transparent polyethylene (0.100 mm) (PTr) and bare soil (control -T); and with five repetitions per each treatment. The variables analyzed were: total fresh weight, number and fresh weight of commercial leaves, root fresh weight, lettuce head diameter and yield. The soil temperature was monitored during the crop growth. The silver, white and black polyethylene coverings showed similar results. However, they were superior for all the evaluated characteristics compared to other coverings. The soil temperature was influenced by the different types of covering. There was increases of soil temperature for all the plastic coverings. However, the organic material reduced the soil temperature in comparison to the control treatment.

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“…1998; Guo and Gu 2000; Liu 2000). The use of mulching during butterhead lettuce cultivation has helped to improve both the quality and productivity of this crop (Verdial et al . 2001).…”

Section: Introductionmentioning

confidence: 99%

Ring Characterization of Quality Indices in Butterhead Lettuce Cultivated Under Mulch and Bare Soil

Goñi

Moreira

Ponce

et al. 2010

Journal of Food Quality

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Butterhead lettuce was characterized by physical, microbiological and nutritional quality indices as a function of plant zoning and soil management (bare soil and mulch). Quality indices were measured in all the rings from the external toward the internal ratio. Assayed indices were: relative water content, water content, free and bound water, and the ratio between free water and total water, leaf area and color, total microbial counts (TMC) and ascorbic acid content (AA). The lettuce characterization by rings showed a remarkable plant zoning as a function of leaf age and development; also, some initial indices were affected by the soil management employed. Plastic mulches affect the microclimate around the plant, resulting in better plant water status. However, the use of black plastic covers could absorb sunlight therefore increasing soil temperature and causing lower AA and higher TMC in lettuce tissue. 4 Corresponding

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Production of iceberg lettuce using mulches

Cited by 20 publications

References 3 publications

The Effect of Plant Growth Promoting Bacteria on Transplants Growth and Lettuce Yield in Organic Production

The Effect of Plant Growth Promoting Bacteria on Transplants Growth and Lettuce Yield in Organic Production

Crescimento e produtividade de alface sob diferentes tipos de cobertura do solo

Ring Characterization of Quality Indices in Butterhead Lettuce Cultivated Under Mulch and Bare Soil

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