Potassium Fertilization for Optimization of Onion Production

Marrocos, Saulo de Tarcio Pereira; Grangeiro, Leílson Costa; Sousa, Valdívia de Fátima Lima de; Ribeiro, Rayanne Maria Paula; Cordeiro, Carlos J. X.

doi:10.1590/1983-21252018v31n214rc

Cited by 8 publications

(9 citation statements)

References 5 publications

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“…However, no symptoms of K deficiency were observed, even in the treatment without the addition of this nutrient. A positive response to K fertilisation, but with leaf contents of this nutrient superior to those obtained in this experiment, was verified by Marrocos et al (2018), who evaluated the effect of cultivation periods and K doses on the cultivar 'IPA 11', obtaining average leaf K contents of 51.22 and 43.84 g kg -1 in September/2012 and April/2013, respectively.…”

Section: Resultssupporting

confidence: 72%

“…An explanation for this difference may be related to the interaction in the soil between K and the elements Ca and Mg since in the soil (Argissolo Vermelho Amarelo -Ultisol) used by Marrocos et al (2018), this ratio was 6.4, whereas, in the present study, it was 14.0. The effect of the (Ca+Mg)/K ratio on the absorption of these three elements in the vegetative part of the garlic crop was observed by Bull et al (1998), who found that that the reduction in this ratio from 207.3 to 1.9 practically quadrupled the leaf K content.…”

Section: Resultscontrasting

confidence: 61%

“…Studies with K fertilisation in onion have demonstrated yields from 2.9 to 32.0% with the K 2 O dose of 100 kg ha -1 (NABI et al 2010;KAUR et al 2017), from 36.1 to 85.8% with the K 2 O dose of 120 kg ha -1 (SAUD et al 2013), from 9.4 to 23.4% with the K 2 O dose of 180 kg ha -1 (MARROCOS et al 2018) and 78.2% with the K 2 O dose of 225 kg ha -1 (CECÍLIO FILHO et al 2010). The observed variations are due to the genetic material, K levels in soil, the forms and moment of nutrient application, besides plant density.…”

Section: Introductionmentioning

confidence: 99%

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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: Resultssupporting

confidence: 72%

Section: Resultscontrasting

confidence: 61%

Section: Introductionmentioning

confidence: 99%

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

et al. 2019

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“…The higher concentrations of nitrogen during vegetative period can be attributed to the active growth at this stage, resulting in partitioning of the nutrients to the above-ground plants. Increasing the dosage of potassium from 36 to 180 kg K 2 O per ha significantly increased onion yield, with bulb production at 180 kg K 2 O per ha being 22.8% higher than without fertilizer, while the leaf potassium contents of onion with no fertilizers was still within the sufficiency range (Marrocos et al, 2018). In our study, we did not notice the symptoms of N, P or K deficiency in the control plants.…”

Section: Bulb Production In E Bulbosacontrasting

confidence: 57%

Biology and bulb production of Eleutherine bulbosa (Iridaceae), a native species from Borneo, Indonesia

2021

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Eleutherine bulbosa is a known ornamental plant of the Iris family, which originated from Central Borneo, Indonesia. The bulbs of E. bulbosa have long been used as a medicinal source by the local people of Borneo. Despite its known medicinal and other values, studies on the morphology and efficiency in bulb production of this species are limited. The aims of our study are to examine the vegetative and reproductive morphology of E. bulbosa, and to determine the effect of various dosages of NPK fertilizer on flowering and bulb production. The plants were grown in pots using potting mix consists of equal volume of burnt rice hulls, cocopeat, and organic manures (1:1:1). Our study showed that E. bulbosa has a cymose rhipidium inflorescence with 25-50 mm long peduncles, have 3-4 umbel on the secondary axis, each consists of 10-12 florets that opens in turn every day. Florets are 20-30 mm long, 20 mm in diameter, 10-15 mm pedicels, and short-lived. The perianth is white, about 25 mm wide with yellow anthers and stigma. Fruits were not formed during the duration of the study. NPK fertilizer application at the lowest dose of 1 g per pot had promoted earlier shoot emergence and vegetative growth, including plant height, leaf number, leaf size, number of tillers, and bulb production compared to control (no fertilizer). Application of fertilizer at 1 and 2 g per plant significantly promoted earlier flowering, whereas application at 3 g per plant delayed and reduced the proportion of flowering plants. The results of this study can aid in taxonomic identification and efficient cultivation of this plant for uses as potted flowering ornamentals or bulb production for different purposes. Higher cultivation and reduced wild harvesting can result in the conservation of this species.

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“…Potassium can improve plant strength and health because it plays an important role in plant physiology, including in the synthesis, transportation, and storage of assimilation products (BUKHSH et al, 2012;HAWKESFORD et al, 2012). Potassium is an important nutrient for shallots in agricultural culture, and several studies have shown that the accumulation of potassium varies according to cultivar and planting location (VIDIGAL; MOREIRA; PEREIRA, 2010; AGUIAR NETO et al, 2014;MARROCOS et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

GROWTH CHARACTERISTICS OF SHALLOT var. TINOMBO FOLLOWING APPLICATION OF POTASSIUM FERTILIZER AND MANURE

Muhardi

2022

Rev. Caatinga

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The response of shallot plants to potassium differs substantially depending on the cultivar, organic matter, soil conditions, and weather in the cultivation area. This research aimed to determine some of the growth characteristics of a Tinombo variety of shallot following treatment with an organic fertilizer comprising manure and potassium in the area of Palu, Central Sulawesi. This research took the form of a greenhouse experiment with planting in pots arranged in a completely randomized factorial pattern. The first factor was the application of chicken manure at 0 and 10 tons.ha-1, while the second factor was the dose of KCl fertilizer: 0 kg.ha-1; 30 kg.ha-1; 60 kg.ha-1 and 90 kg K2O.ha-1. Each treatment was replicated three times. The application of potassium and manure significantly affected the accumulation of dry matter and the linear growth rate of shallot var. Tinombo. Manure applied at 10 tons.ha-1 increased the leaf area index when combined with 0 to 60 kg K2O.ha-1. However, the addition of manure increased the net assimilation rate at all doses of potassium fertilizer. The number of bulbs and harvest index were affected by the amount of manure and potassium fertilizer applied, but there was no significant interaction between these two factors. Applying manure and K2O fertilizer resulted in a significantly higher number of bulbs and a better harvest index than in those cases where the two types of fertilizer were not applied.

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Potassium Fertilization for Optimization of Onion Production

Cited by 8 publications

References 5 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

Biology and bulb production of Eleutherine bulbosa (Iridaceae), a native species from Borneo, Indonesia

GROWTH CHARACTERISTICS OF SHALLOT var. TINOMBO FOLLOWING APPLICATION OF POTASSIUM FERTILIZER AND MANURE

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