Produtividade de cebola influenciada pela aplicação de micronutrientes

Kürtz, Claudinei; Ernani, Paulo Roberto

doi:10.1590/s0100-06832010000100014

Cited by 15 publications

(12 citation statements)

References 7 publications

(5 reference statements)

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“…Adequate nutrition of the onion crop influences several factors, such as increased yield and sanity and bulb quality. Excessive fertilization, mainly of N, P, and K, monoculture, and indiscriminate use of acidity correctors are common practices in producing regions of this vegetable (KURTZ;ERNANI, 2010). Fertilizer programs should define the amount of nutrients to be replenished in the soil since the quantities exported by bulbs represent a significant component (MAY et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Macronutrient extraction curves of the onion crop

Gonçalves

Aquino

Duarte

et al. 2019

SCA

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This study aimed to determine the extraction curves and accumulation order of macronutrients of two onion cultivars. In commercial fields in the region of Alto Paranaíba, MG, Brazil, onion plants of the cultivars ‘Optima’ and ‘Sirius’ were collected during the cycle in 2014 and 2015 to determine dry matter and macronutrient accumulation. The yield was determined at harvest time. Three phases of dry matter and nutrient accumulations were observed. The first phase had a slow accumulation and was followed by a fast increment and subsequent stabilization in phases two and three, respectively, for most of the nutrients in both cultivars and years of cultivation. Duration and accumulated at each phase were different between cultivars and years of cultivation. The total and commercial bulb yield did not vary between cultivars but only between years of cultivation, with average values of 117 and 60 Mg ha?1 in 2014 and 2015, respectively. The partitioning of dry matter and macronutrients followed the same model for both cultivars and years of cultivation. Macronutrients with the largest partitioning for bulbs are P and S. The decreasing extraction order for both cultivars was K > Ca > N > P > Mg > S in 2014 and K > N > Ca > P > S > Mg in 2015.

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Section: Introductionmentioning

confidence: 99%

Macronutrient extraction curves of the onion crop

Gonçalves

Aquino

Duarte

et al. 2019

SCA

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“…Plant nutrition is one of the several factors influencing the productivity and quality of onion bulbs (KURTZ; ERNANI, 2010). Balanced plant nutrition, attained through the supply of nutrients for the growth and development of plants at different stages of development, is essential for them to express their maximum genetic potential.…”

Section: Introductionmentioning

confidence: 99%

Determination of Growth and Nutrient Accumulation in Bella Vista Onion

et al. 2018

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Knowledge of the nutrient uptake by crops at different stages of growth may provide the basis for rational application of fertilizers, which may lead to reduced production costs and improved use of fertilizers by plants. Based on this knowledge, we conducted this study to determine the biomass and nutrient accumulation curve of the onion cultivar Bella Vista in a system of transplanted seedlings. The experiment was carried out in Ituporanga-SC, Brazil, by using a randomized block design with three replicates. Eleven plant collections were carried out throughout the crop cycle. The variables evaluated included plant length; total dry biomass of leaves, bulbs, and roots; and concentrations of macro- and micronutrients. The maximum dry biomass accumulation in the shoots and bulbs at 140 days after transplanting (DAT) was 4.26 and 27.41 mg per plant, respectively, which contributed to 13% and 85% of the whole plant dry biomass at the end of the cycle, respectively. Potassium (K, 521.6 mg) was accumulated in the largest quantity per plant, followed by nitrogen (N, 465.7 mg), calcium (Ca, 253.3 mg), sulfur (S, 109.0 mg), magnesium (Mg, 86.9 mg), and phosphorus (P, 76.5 mg). The micronutrient accumulation was as follows: iron (Fe, 6,227.5 µg), boron (B, 902.3 µg), zinc (Zn, 573.7 µg), manganese (Mn, 573.7 µg), and copper (Cu, 241.4 µg).

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“…A adição excessiva de fertilizantes, principalmente de N, P e K, o uso indiscriminado de corretivos de acidez e o monocultivo, são práticas comuns em regiões produtoras ( Kurtz & Ernani, 2010). Rodolfo Júnior et al (2008) citam que adubos orgânicos não substituem os fertilizantes convencionais.…”

Section: Introductionunclassified

Crescimento e acúmulo de macronutrientes na cultura da cebola em Baraúna (RN) e Petrolina (PE)

Neto¹,

Grangeiro

Mendes

et al. 2014

Rev. bras. eng. agríc. ambient.

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Com o objetivo de avaliar o crescimento e o acúmulo de nutrientes por cultivares de cebola experimentos foram desenvolvidos na estação experimental de Bebedouro (Petrolina, PE) pertencente à Embrapa Semiárido, no período de maio a outubro de 2009 e em Baraúna, RN, em área comercial, no período de junho a outubro de 2009. O delineamento utilizado em cada experimento foi em blocos casualizados completos, com quatro repetições em esquema fatorial 2 x 6. Os tratamentos resultaram da combinação de duas cultivares de cebola (IPA 11 e Texas Grano 502) e seis épocas de coleta (15, 30, 45, 60, 75 e 90 DAT). Em cada coleta foram utilizadas seis plantas por repetição. A cebola, cultivares IPA 11 e Texas Grano, apresentou crescimento inicial lento intensificando-o a partir dos 30 dias após o transplantio. Maiores incrementos na matéria seca total, da parte aérea e do bulbo, ocorreram no período de 60 a 75 DAT. Os nutrientes foram absorvidos pela cebola na seguinte ordem: Ca > K > N > Mg > P e Ca > N > K > Mg > P para "Texas Grano 502" e "IPA 11" em Petrolina e K > Ca > N > Mg > P e N > K > Ca > Mg > P para "Texas Grano 502" e "IPA 11" em Baraúna. As cultivares Texas Grano 502 e IPA 11 exportaram mais nutrientes em Baraúna.

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Produtividade de cebola influenciada pela aplicação de micronutrientes

Abstract: RESUMO

Cited by 15 publications

References 7 publications

Macronutrient extraction curves of the onion crop

Macronutrient extraction curves of the onion crop

Determination of Growth and Nutrient Accumulation in Bella Vista Onion

Crescimento e acúmulo de macronutrientes na cultura da cebola em Baraúna (RN) e Petrolina (PE)

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