Produtividade da batata-doce em função de doses de K2O em solo arenoso

Brito, Carlos Henrique de; Alves, Arnaud Azevêdo; Dorneles, Carina S M; Santos, João Francisco dos; Nóbrega, José Pires Ribeiro

doi:10.1590/s0102-05362006000300010

Cited by 14 publications

(11 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Splitting potassium fertilization, especially in sandy soils, is important to reduce the problems of salinity and leaching (Brito et al, 2006;Rosolem et al, 2006). 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).…”

Section: Fertilization With Macronutrientsmentioning

confidence: 99%

Mineral nutrition and fertilization of sweet potato

Fernandes¹,

Ribeiro²

2020

Científica

View full text Add to dashboard Cite

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.

show abstract

Section: Fertilization With Macronutrientsmentioning

confidence: 99%

Mineral nutrition and fertilization of sweet potato

Fernandes¹,

Ribeiro²

2020

Científica

View full text Add to dashboard Cite

show abstract

“…Por outro lado, o K é importante para a translocação de carboidratos, para o uso eficiente da água e pode favorecer a qualidade do produto a ser comercializado, entre outras funções (MARSCHNER, 1995). Além disso, há o fato de a batata-doce ser expressivamente responsiva à adubação potássica (MONTEIRO; PERESSIN, 1997;MARTI;MILLS, 2002;FILGUEIRA, 2003;ECHER et al, 2009b;BRITO et al, 2006). Portanto, evidencia-se que, mais importante do que as adubações isoladas de N e K na batata-doce, são as interações entre ambas.…”

Section: Fonte: Elaboração Dos Autoresunclassified

Adubação de cobertura na batata-doce com doses combinadas de nitrogênio e potássio

Foloni

Corte

et al. 2013

Sem. Ci. Agr.

View full text Add to dashboard Cite

“…In Brazilian K‐deficient soils, studies have indicated that K fertilization increased the marketable root yield of sweetpotato with the application of up to 174–180 kg ha −1 K 2 O (Brito et al., 2006; Nogueira et al., 1992). In contrast, the optimal rate for sweetpotato yield in K‐deficient soils in China ranges from 150 to 300 kg ha −1 K 2 O (Gao et al., 2021; George et al., 2002; Wang et al., 2020).…”

Section: Introductionmentioning

confidence: 99%

“…The Brazilian guidelines recommend only 120 kg ha −1 K 2 O for K‐deficient soils; for soils with medium or high exchangeable K concentrations, the suggested rates are 90 and 60 kg ha −1 K 2 O, respectively (Casali, 1999; Echer et al., 2015; Lorenzi et al., 1997). Under low or medium soil K availability, K fertilization increases sweetpotato root yield (Brito et al., 2006; Gao et al., 2021; George et al., 2002; Nogueira et al., 1992, Wang et al., 2020), but a negative response to K fertilization can occur in soils with high exchangeable K concentrations. However, some studies on sweetpotato yield in tropical sandy soils have shown a positive response to K fertilization, even in soils with medium to high exchangeable K concentrations (Corrêa et al., 2018; Echer et al., 2009a; Foloni et al., 2013).…”

Section: Introductionmentioning

confidence: 99%

Sweetpotato responses to potassium rate and timing in tropical sandy soils

et al. 2023

View full text Add to dashboard Cite

The response of sweetpotato [Ipomoea batatas (L.) Lam.] to potassium (K) can vary based on soil K availability and the rate and timing of K application. This study evaluated the effects of K application rate and timing on leaf K concentration and yield attributes of sweetpotatoes grown in tropical sandy soils with different K availabilities. Treatments had three rates (60, 120, and 240 kg ha−1 K2O) and four timings (pl, the full rate at planting; pl‐1.3, 1/2 rate at planting plus 1/2 at 1.3 months after planting [MP]; pl‐3, 1/2 rate at planting plus 1/2 at 3 MP; pl‐1.3–3, 1/3 rate at planting plus 1/3 each at 1.3 and 3 MP), including a control (without K application). The benefits of K timings and application rates on sweetpotato yield were greater in K‐deficient soils with the maximum yield of sweetpotato (25.8–34.3 Mg ha−1) at the estimated rate of 153–179 kg ha−1 K2O in three application times. In soil with medium exchangeable K, the maximum total root yield (28.5–34.2 Mg ha−1) occurred at an optimum estimated rate of 113–122 kg ha−1 K2O. In soils with high exchangeable K, K application rates reduced the yield of roots or starch, and no K deficiency occurred in the unfertilized K treatments. To obtain high storage root and starch yields in sweetpotatoes grown in K‐deficient tropical sandy soils, there should be three K applications, and K application rates should be based on K levels already available in the soil.

show abstract

Produtividade da batata-doce em função de doses de K2O em solo arenoso

Cited by 14 publications

References 0 publications

Mineral nutrition and fertilization of sweet potato

Mineral nutrition and fertilization of sweet potato

Adubação de cobertura na batata-doce com doses combinadas de nitrogênio e potássio

Sweetpotato responses to potassium rate and timing in tropical sandy soils

Contact Info

Product

Resources

About