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

Gonçalves, Francisco das Chagas; Grangeiro, Leílson Costa; Sousa, Valdívia de Fátima Lima de; Jesus, Priscila Maylana Modesto de; Silva, Gerlani Alves da

doi:10.1590/1983-21252019v32n404rc

Cited by 6 publications

(2 citation statements)

References 24 publications

(26 reference statements)

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“…Ambiental, v.28, n.4, e279061, 2024. Gonçalves, 2019b), 43.0 kg ha -1 of Ca, 14.0 kg ha -1 of Mg and 0.19 kg ha -1 of S. As nutritional sources, urea, potassium chloride, potassium nitrate, calcium nitrate, and magnesium sulfate were used.…”

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confidence: 99%

Selenium as an inorganic biostimulant in onion grown in a semi-arid climate

Paiva,

Grangeiro,

Nascimento

et al. 2024

Rev. bras. eng. agríc. ambient.

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The common climatic characteristics in semi-arid regions can cause abiotic stress and be a limiting factor for crops. Under these conditions, the use of beneficial elements such as selenium (Se) is an alternative to mitigate the harmful effects of abiotic stresses and increase yield. Therefore, this research aimed to evaluate the agronomic performance of onion grown in a semi-arid region under the application of Se. A field experiment was performed in a randomized block design, where five doses of Se (0, 15, 30, 45, and 60 g ha-1), by foliar application, were tested on two onion hybrids (Andrômeda and Rio das Antas). Growth, nutritional and yield variables were analyzed. Se increased the height and accumulation of dry mass in onion plants, with a maximum at the 60 g ha-1 dose of Se, the same dose at which the highest commercial (78.15 t ha-1) and total (86.03 t ha-1) bulb yields were obtained in Rio das Antas; however, for Andrômeda, there was no effect of Se on yield. Applied Se doses also increased the content of this element in the bulbs. Despite increasing bulb yields only in the Rio das Antas hybrid, 60 g ha-1 of Se is recommended for onions due to its effects on plant growth and the biofortification of bulbs with Se.

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Section: /7mentioning

confidence: 99%

Selenium as an inorganic biostimulant in onion grown in a semi-arid climate

Paiva,

Grangeiro,

Nascimento

et al. 2024

Rev. bras. eng. agríc. ambient.

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“…The productivity and quality of onion bulbs are associated with genetic, climatic and phytotechnical factors (Gonçalves et al, 2019). In onion culture, the choice of cultivar is conditioned by environmental factors, especially photoperiod and temperature, characteristic of each region, which favors the bulbification process.…”

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confidence: 99%

Agronomic performance and physicochemical characteristics of onion genotypes under different spacing in the humid Amazonian tropics

Piacentini

Moreira

Cordeiro

et al. 2021

Int J Innov Educ Res

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The Southwest region of Pará state, Brazil, imports 100% of all onion consumed from other regions of the country, which generates market dependence and raises the product's costs. The present study investigated parameters related to germination, agronomic performance and postharvest characteristics of five onion cultivars at different planting densities. The experiment was conducted in two stages. In the first, in a greenhouse, the germination kinetics was evaluated. In the second, in the field, the seedlings were transplanted into beds. The experimental design was in complete randomized blocks in a 5 x 3 factorial scheme with three replications. The treatments consisted of the combination of five cultivars (Mata Hari, Dulciana, Cimarron, NUN 1205-F1 and Vale Ouro IPA 11) and three line spacing (20, 30 and 40 cm) 8 cm between plants. As for the germination rate (GR), the results allowed to highlight the cvs. Cimarron and Vale Ouro IPA 11 with an 80.55% and 77.77% of GR, respectively. There was a significant difference for total bulb productivity, highlighting Vale Ouro IPA 11 in the 8 x 20 cm spacing. For the bulb diameter, cv. Vale Ouro IPA 11 obtained the best results in all classes. In the average weight of the bulbs, cv. Vale Ouro IPA 11 in the 8 x 40 cm spacing was the best treatment with 60.77g. As for total soluble solids, cv. Vale Ouro IPA 11 presented °Brix higher than the others, being significant at 1%. These results demonstrate that it is possible to produce quality onions in the Southwest region of Pará, which would reduce prices, since all commercialized onions come from regions outside the state.

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