Épocas de plantio e doses de nitrogênio e potássio na produtividade e armazenamento da cebola

Resende, G. M. de; Costa, N. D.

doi:10.1590/s0100-204x2008000200010

Cited by 6 publications

(5 citation statements)

References 9 publications

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“…The minimum PNMB was 2.16% at the K 2 O dose of 226.8 kg ha -1 , which was very close to the dose responsible for maximum MY. An effect of K on the reduction of the NMY has also been observed by Resende and Costa (2008) and Resende et al (2009).…”

Section: Resultsmentioning

confidence: 65%

Agronomic and Qualitative Performance of Densely Cultivated Onion Cultivars as Affected by Potassium Fertilisation

et al. 2019

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The increase in plant density, combined with the use of hybrids in onion cultivation, has provided significant gains in yield, with a direct impact on the amount of absorbed macronutrients. The present work aimed to evaluate the yield and quality of two onion cultivars under a densified system as a function of potassium doses supplied via fertirrigation. A randomized complete block design was used in a 2 x 7 factorial scheme with four replications. The treatments consisted of two cultivars (IPA 11 and Rio das Antas) and seven potassium doses (0, 70, 140, 210, 280, 350 and 420 kg ha-1 K2O), provided by fertigation. The potassium doses that provided maximum total and commercial yields were 215 and 216 kg ha-1 of K2O, respectively. The soluble solids and the percentage of bulbs of classes 2, 3 and 4 were not influenced by potassium fertilization. There was a reduction in the percentage of non-commercial bulbs with the increase of potassium doses. The dose with maximum economical efficiency was 210.6 kg ha-1 of K2O, responsible for a commercial yield of 61.8 t ha-1.

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Section: Resultsmentioning

confidence: 65%

Agronomic and Qualitative Performance of Densely Cultivated Onion Cultivars as Affected by Potassium Fertilisation

et al. 2019

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“…A melhoria na síntese de compostos simples (monossacarídeos e aminoácidos) em compostos mais complexos como amidos e proteínas, aumentam a resistência ao ataque microbiológico e consequente o apodrecimento. O resultado corrobora com trabalho de Resende & Costa (2008) que também apresentaram redução linear nas perdas com o incremento das doses de K, mas contraria Resende & Costa (2009) que apresentou mínima perda com ausência de adubação potássica.…”

Section: Resultsunclassified

Avaliação Das Práticas Do Sistema De Produção E Seus Efeitos Na Armazenagem De Bulbos De Cebola

Marconatto

Marcuzzo

2021

Glob. Sci. Technol.

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Production onion part in the Santa Catarina state, Brazil is stored in rustic warehouses without environmental control, which favors losses weight and quality. The purpose of this study is to understand the causes of onion losses in storage, their relationship, and influence using inputs and techniques applied in cultivation and preharvest, as well as part of the production infrastructure for the two cultivars. Through the data collection with the producers and samples of bulbs of their harvest that were stored for 140 days and is evaluated the losses, was presented that in the Alto Vale do Itajaí the cv. Crioula receives more rain during the cure, is harvested with a lower fallen leaves rate, being more susceptible to budding than cv. Bola Precoce. Bulbs originating from crops with higher productivity, a greater number of plants per area, and a higher volume of nitrogen fertilization in coverage, reduce sprouting in storage. Dehydration was lower in relation to productivity, production, curing period, furthermore, experience time of farmer in onion cultivation. To rotting is lower with increased productivity, production, and potassium fertilization during cultivation. There is a waste in nitrogenous and potassic fertilizers that increase the cost of production in crops with the greater planted area.

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“…Fresh weight loss was between 12.4 and 14.1% in onion bulbs cv. Texas Grano 502 PRR stored during 40 days under environmental conditions after curing under field conditions (Resende & Costa, 2008). The longer the shelf life at room temperature, the greater fresh weight loss (Miguel & Durigan, 2007).…”

Section: Resultsmentioning

confidence: 99%

Artificially cooling of onion bulbs stored in brickwork-patterned vertical silos

Rêgo

Ferreira²,

Pereira

et al. 2019

Hortic. Bras.

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Onion is the third most consumed vegetable worldwide, such as potatoes and tomatoes. Its conservation is influenced by temperature and humidity, and greatest losses occur at postharvest due to lack of storage infrastructure. Thus, the aim of this study was to evaluate the effect of partial cooling in vertical silo on postharvest conservation of cured onion bulbs cultivar Bola Precoce. The experimental design was completely randomized, with six replicates, arranged in split plot scheme. Plots consisted of two storage conditions: onion bulbs stored in silo 1 at room temperature (T1) and bulbs stored in silo 2 with artificial cooling (T2). Subplots were two periods of bulb removal from storage (0 and 14 days). We evaluated peel color, using chroma (C*) and internal and external luminosity (L*); relative water content (TRA) of peel and pulp of bulbs and fresh mass loss (PMF) when the experiment was installed and after 14 days for both experiments and at 21 days for T2. The average temperatures obtained in both silos were 30.4 and 16.4°C, respectively. Bulbs of T1 had 14 days shelf life whereas, bulbs of T2 had a shelf life of 21 days. Bulbs of T1 showed lighter peel on day zero. The 14-day storage made the bulbs lighter in T2. In relation to pulp color, storage period made pulp lighter in both treatments. On day 14, bulbs of T1 showed lighter pulp color comparing to bulbs of T2. Both treatments showed similar behavior on day zero for internal chroma. After 14 days storage, internal and external chroma was higher in bulbs of T2. Storage period reduced internal hue only in bulbs of T2 which showed lower internal hue in both evaluation periods. TRA was higher in T1 in both evaluation periods. PMF was higher according to storage period; however loss did not differ between treatments. Storage of onion bulbs in cooled silos increased their viability in 7 days, in relation to storage without refrigeration. RESUMO Resfriamento artificial em bulbos de cebola armazenados em silos verticais de alvenariaA cebola é a terceira hortaliça mais consumida no mundo, ao lado da batata e do tomate. Sua conservação é influenciada pela umidade e temperatura e, as maiores perdas pós-colheita ocorrem devido à falta de infraestrutura no armazenamento. O objetivo do presente trabalho foi avaliar o efeito do resfriamento parcial de silo vertical na conservação pós-colheita de bulbos curados de cebola, cultivar 'Bola Precoce'. O delineamento experimental utilizado foi inteiramente casualisado, com seis repetições, em esquema de parcelas subdivididas. As parcelas foram constituídas de duas condições de armazenamento [bulbos de cebola armazenados em silo 1 com temperatura ambiente (T1) e bulbos armazenados em silo 2 resfriado (T2)] e as subparcelas foram consideradas dois períodos de retirada dos bulbos do armazenamento (0 e 14 dias). Foram avaliados a cor da casca, a partir do croma (C*) e luminosidade (L*) interna e externa; teor relativo de água (TRA) da casca e da polpa dos bulbos e perda de massa fresca (PMF) no momento de instalação do exper...

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Épocas de plantio e doses de nitrogênio e potássio na produtividade e armazenamento da cebola

Cited by 6 publications

References 9 publications

Agronomic and Qualitative Performance of Densely Cultivated Onion Cultivars as Affected by Potassium Fertilisation

Agronomic and Qualitative Performance of Densely Cultivated Onion Cultivars as Affected by Potassium Fertilisation

Avaliação Das Práticas Do Sistema De Produção E Seus Efeitos Na Armazenagem De Bulbos De Cebola

Artificially cooling of onion bulbs stored in brickwork-patterned vertical silos

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