The split application of potassium influence the production, nutrients extraction, and quality of sweet potatoes

Corrêa, Carla Verônica; Gouvêia, Amauri; Lanna, Natália de Brito Lima; Tavares, Ana Emília Barbosa; Mendonça, Veridiana Zocoler de; Campos, Felipe Girotto; Silva, Janaína Oliveira; Cardoso, Antônio Ismael Inácio; Evangelista, Regina Marta

doi:10.1080/01904167.2018.1485162

Cited by 14 publications

(9 citation statements)

References 8 publications

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“…Potassium (K) is the nutrient most absorbed by sweet potato (Figure 2), being essential for its development (Corrêa et al, 2018). This element is important for sweet potato for its role in enzymatic activation and in carbohydrate formation and conversion into starch, besides acting in the transport of photoassimilates from the leaves to the storage organs (Kumar et al, 2007;Corrêa, 2016).…”

Section: Fertilization With Macronutrientsmentioning

confidence: 99%

“…Moreover, the practice provides K for sweet potato during the formation of storage roots, i.e., in later stages of the cycle, when the plant's demand for K is greater (Figure 1 a, b). In sandy soils, some authors recommend to split potassium fertilization with half the rate at planting and the rest at topdressing together with N (Corrêa et al, 2018). In K-deficient soils, there is evidence that supplying K in two applications (topdressing at 40 and 90 DAP) is better than applying the entire rate at planting or with an early application at topdressing, at 40 DAP (Figueiredo, 2019).…”

Section: Fertilization With Macronutrientsmentioning

confidence: 99%

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Mineral nutrition and fertilization of sweet potato

Fernandes¹,

Ribeiro²

2020

Científica

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Sweet potato (Ipomoea batatas L.) is a versatile crop, but it is often grown in marginal and low-fertility areas, which reflects storage root yields far below its potential. For this reason, balanced liming and fertilization in sweet potato are essential to increase crop yield. Based on this approach, themes related to the nutritional requirements of sweet potato are presented and discussed considering the main cultivars currently used in Brazil as well as references for rational fertilization management in this crop. Sweet potato is a crop that absorbs large amounts of nutrients during its development cycle, but this should not be used as a prerogative to excessively increase the fertilizer rates applied in this root crop. As a strategy for rational fertilization management, one should take advantage of the ability of this crop to associate with N-fixing microorganisms, thus reducing the use of mineral N. Moreover, it is necessary to encourage the use of organic fertilizer, whether using animal manure or green manure. In addition to increasing storage root yield and improving storage root shape, organic fertilizers can partially replace mineral chemical fertilizers. Studies aimed at updating cultivar-specific potassium and phosphate fertilizer recommendations should also be encouraged, as well as research addressing micronutrient supply for sweet potato.

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Section: Fertilization With Macronutrientsmentioning

confidence: 99%

Section: Fertilization With Macronutrientsmentioning

confidence: 99%

Mineral nutrition and fertilization of sweet potato

Fernandes¹,

Ribeiro²

2020

Científica

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“…Sweet potato [Ipomoea batatas (L.) Lam.] crops have been often grown in marginal areas of tropical and subtropical climate regions, in which the soils are poor in essential nutrients (Minemba et al, 2019;Munda et al, 2019;Navarro et al, 2020;Wang et al, 2022) and have low addition of nutrients, especially phosphorus (P) (Corrêa et al, 2018;Munda et al, 2019;Kareem et al, 2020;Nyarko et al, 2022). It results in poor vegetative growth and yield (Munda et al, 2019), since P is one of the main nutrients for most plant species, including sweet potato (El-Sayed et al, 2011;Ichikawa et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Sweet potato yield and quality as a function of phosphorus fertilization in different soils

Cordeiro

Echer

Batista

et al. 2023

Rev. bras. eng. agríc. ambient.

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Phosphorus (P) is an essential nutrient for growth and yield of sweet potatoes; in sandy soils, sweet potato yield and quality may be limited by application of low P doses, mainly in degraded areas. The objective of this work was to evaluate the effect of P doses on yield and quality of sweet potato root tubers grown in tropical sandy soils with different initial P availabilities: 23.2 mg dm-3 (high P - crop rotation) and 3.7 mg dm-3 (low P - post degraded pasture). Two experiments were carried out in a randomized block design, with four replicates. The treatments consisted of P doses (0, 22, 44, 88, and 176 kg ha-1) applied to the planting bed. Tuber yield, number and mean weight of tubers, P concentration in leaves and tubers, exported P, as well as the percentage of starch, reducing sugars, total sugars, and sucrose in the tubers were evaluated. P concentration in the soil was evaluated at the end of the experiment. In the area with high P availability (> 20 mg dm-3 - resin), increasing P doses did not increase root tuber yield and decreased root starch concentrations. In the area with low P availability (< 3.7 mg dm-3 - resin), root tuber yield and starch concentration peaked when applying 68 and 33 kg ha-1 of P, respectively. In areas after degraded pasture, with low initial soil P concentration, P fertilization for sweet potato crops should be carried out with a P dose of 68 kg ha-1. In areas with crop rotation and adequate soil P concentration, P fertilization should be carried out to replace the amount of P exported by the harvested root tubers to avoid decreases in soil fertility.

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“…Potassium influences the quality and development of vegetables by increasing biomass production and leaf area and reducing sugar concentration. Meanwhile, potassium deficiency reduces the distribution of assimilates via the phloem (Corrêa et al, 2018;Koch et al, 2020). The demand for this macronutrient can be met by using potassium chloride (KCl) and potassium sulfate (K 2 SO 4 ) (El-Mogy et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Sweet potato yield in response to different potassium sources and splitting of fertilization

Silva

Cruz

Sousa

et al. 2022

Rev. bras. eng. agríc. ambient.

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Sweet potatoes are an important staple food for human consumption. This study evaluated sweet potato yield in response to potassium fertilization using different sources and splitting. It was conducted at the Universidade Federal da Paraíba, Areia-PB. A complete randomized block experimental design was used in a 7 × 2 factorial arrangement. The fertilization was split into seven treatments (100% after planting; 100% at 30 days after planting (DAP); 100% at 60 DAP; 50% after planting and 50% at 30 DAP; 50% after planting and 50% at 60 DAP; 50% at 30 DAP and 50% 60 at DAP; 33% after planting, 33% at 30 DAP, and 33% at 60 DAP). Two fertilization sources were used, namely potassium chloride and potassium sulfate, with three replicates. Plant fresh mass, mass of marketable roots, production of marketable roots per plant, leaf K concentration, total and marketable root yields were evaluated. Chloride and sulfate potassium efficiently increased the fresh mass of the plant and the mass of marketable roots, respectively. The marketable yield of the roots (25.16 and 22.28 Mg ha-1) was higher than the national average (14.07 Mg ha-1) when K2O was supplied in the sulfate and potassium chloride sources, respectively. The leaf K concentration remained within the standard levels for the crops under chloride and potassium sulfate fertilization. Potassium sulfate application results in higher sweet potato yields. When supplied in a single application, chloride and sulfate potassium increase the total and commercial yield only when the plants are at 60 DAP.

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The split application of potassium influence the production, nutrients extraction, and quality of sweet potatoes

Cited by 14 publications

References 8 publications

Mineral nutrition and fertilization of sweet potato

Mineral nutrition and fertilization of sweet potato

Sweet potato yield and quality as a function of phosphorus fertilization in different soils

Sweet potato yield in response to different potassium sources and splitting of fertilization

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