Coeficiente de cultura e produtividade da cebola submetida a diferentes lâminas de irrigação

Oliveira, Gertrudes Macário de; Leitão, M. M. V. B. R.; Bispo, Regiane de Carvalho; Santos, Irai Manuela Santana; Lima, C. B. de; Carvalho, Adheilton Rogers Pilé de

doi:10.1590/s1415-43662013000900009

Cited by 14 publications

(23 citation statements)

References 10 publications

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“…Similar responses were reported by Marouelli et al (2005) and Oliveira et al (2013), who observed this same trend. In the present study, the use of mulch, which according to Marouelli et al (2005) decreases soil exposure to evaporation, promoted lower Kc values, with reductions of 18% in stage II and 3% in stage IV, compared with the AM (Table 3).…”

Section: Methodssupporting

confidence: 91%

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Marketable yield of onion under different irrigation depths, with and without mulch

Carvalho

Ribeiro

Gomes

2018

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThe objectives of this study were to obtain the onion crop coefficients and evaluate the influence of different irrigation depths (0, 22, 45, 75 and 100% of crop evapotranspiration) on marketable yield and quality of onion bulbs cultivated with and without mulch of elephant grass. The experiment was carried out in Seropédica, RJ, Brazil, from May to September 2012, in a Red Yellow Argisol. The experimental design was in randomized blocks in split plots, with 10 treatments and seven replicates. Irrigation management was performed through soil water balance using the Time Domain Reflectometry technique, with probes installed horizontally at 7.5 and 22.5 cm depths. The use of mulch allowed the application of smaller irrigation depths, leading to lower crop coefficient (18% in stage II and 3% in stage III) in comparison to the crop without mulch. Irrigation depths associated with the use of mulch influenced the evaluated production variables, proving to be an alternative to increase marketable yield and quality of onion bulbs, with lower irrigation depth.Produtividade comercial da cebola sob diferentes lâminas de irrigação, com e sem cobertura do solo R E S U M O Objetivou-se neste estudo obter os coeficientes de cultivo para a cultura da cebola e avaliar a influência de diferentes lâminas de irrigação (0, 22, 45, 75 e 100% da evapotranspiração da cultura) na produtividade comercial e na qualidade de bulbos de cebola, cultivada com e sem cobertura vegetal morta de capim-elefante no solo. O experimento foi realizado em Seropédica, RJ, Brasil, entre maio e setembro de 2012, em um Argissolo VermelhoAmarelo. O delineamento experimental adotado foi em blocos casualizados em parcelas subdivididas, com10 tratamentos e sete repetições. O manejo da irrigação foi realizado por meio do balanço de água no solo utilizando a técnica da Reflectometria no Domínio do Tempo, a partir de sondas instaladas horizontalmente a 7,5 e 22,5 cm de profundidade. A utilização da cobertura morta permitiu a aplicação de menores lâminas de irrigação, proporcionando coeficientes de cultivo inferiores (18% no estágio II e 3% no estágio III) ao cultivo sem cobertura do solo. A lâmina de irrigação associada ao uso da cobertura vegetal morta no solo influenciou as variáveis de produção avaliadas, demonstrando ser uma alternativa para elevar a produtividade comercial e a qualidade de bulbos de cebola com menor lâmina de irrigação.

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Section: Methodssupporting

confidence: 91%

“…Onion (Allium cepa L.) stands out among the other cultivated vegetables, for its volume of production and consumption and economic value (Oliveira et al, 2013). In 2015, an area of 56.4 thousand hectares was harvested in Brazil, generating a production of 1.42 million tons (IBGE, 2016).…”

Section: Introductionmentioning

confidence: 99%

Marketable yield of onion under different irrigation depths, with and without mulch

Carvalho

Ribeiro

Gomes

2018

Rev. bras. eng. agríc. ambient.

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“…Studies on irrigation of onion show that bulb productivity is highly dependent on the amount of water applied (Santa Olalla et al, 1994, Shock et al, 2000. Despite the dependence of the onion crop on irrigation, little information about actual water requirements, which allows to promote higher yields, can be found (Oliveira et al, 2013).…”

Section: Researchmentioning

confidence: 99%

Onion productivity in relation to irrigation water depths and nitrogen doses

et al. 2018

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Onion is considered the third most important vegetable in terms of economic value in Brazilian horticulture. The factors of production which most limit the productivity of the species are water and nutrients; so, irrigation and soil fertility control are determinant criteria for crop success. The aim of this study was to evaluate the influence of different water depths and nitrogen doses on the productivity of onion, Aquarius hybrid. Five water depths [(0, 75, 100, 125 and 150% of crop evapotranspiration (ETc)] and five nitrogen doses (0, 120, 180, 240 and 300 kg ha-1, urea form), arranged in a scheme of subdivided plots, in a completely randomized design with four replicates. We used sprinkler irrigation system. Irrigation management and water depths were estimated using Irrigameter. Plants were harvested when more than 60% of them completed the vegetative period. The water depth corresponding to 150% of the crop evapotranspiration provided higher total and commercial onion productivities, applying doses of 226.8 and 229.8 kg ha-1 of nitrogen, respectively.

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“…A evapotranspiração da cultura (ETc) é uma variável dependente dos elementos meteorológicos, da cultura e do solo podendo ser medida diretamente (lisímetros) ou indiretamente, por equações combinadas (OLIVEIRA et al 2013). O coeficiente de cultura (Kc) é determinado empiricamente, varia com a cultura e com seu estádio de desenvolvimento da cultura (FIGUERÊDO et al 2009).…”

Section: Introductionunclassified