Influence of phosphate fertilization on phosphorus levels in foliage and tuber yield of the potato cv. Ágata

Luz, José Magno Queiróz; Queiroz, Antônia Márcia Duarte; Borges, Marcela; Oliveira, Roberta Camargos de; Leite, Samara Soares; Cardoso, Rodrigo Ribeiro

doi:10.5433/1679-0359.2013v34n2p649

Cited by 21 publications

(32 citation statements)

References 4 publications

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“…Phosphorus fertilization linearly increased the leaf P concentration in the sandy soil, but in the clayey soil, the increases in leaf P concentration occurred only up to the estimated rate of 151 mg dm -3 P ( Figure 1a). Luz et al (2013) observed a reduction in leaf P concentration in the potato cultivated in clayey soil, with an increase in P supply, although the P availability in the soil increased. In the lower and higher P rates, the P concentration in the leaves of the potatoes cultivated in the sandy soil was higher than in the potatoes cultivated in the clayey soil, possibly due to relatively higher increase in P availability in the sandy soil compared to the clayey soil.…”

Section: Resultsmentioning

confidence: 97%

Phosphorus Fertilization and Soil Texture Affect Potato Yield

et al. 2018

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-Potato (Solanum tuberosum L.) is a nutritionally demanding crop, and phosphorus (P) is a nutrient that exerts a large effect on tuber yield. However, as the availability of P is influenced by soil texture, there are doubts about how P supplementation affects the growth and yield of potato plants in different soil textures. Thus, here we aimed to evaluate the effect of P fertilization and soil texture on the nutrition, growth, tuber yield, and P use efficiency (PUE) of potato plants. The experiment was conducted under greenhouse conditions in a randomized block design with a 4×2 factorial scheme and five replications. The treatments were represented by four P rates (10, 50, 100, and 200 mg dm -3 P) and two soil textures (clayey and sandy). The concentrations of P, Ca, and Mg in the leaves were higher in sandy soil, and P rates increased the concentrations of N, P, and Ca in the leaves of potato plants. Phosphorus fertilization increased plant growth, the amount of P accumulated in the shoot, and tuber yield in both soils; this trend was stronger in the potato cultivated in the clayey soil than in the sandy soil. The applied-PUE was not affected by soil texture. In the potato cultivated in the sandy soil, the taken up-PUE was reduced due to the decrease in dry matter production and an increase in P concentration in the organs of the plant with higher P fertilizer rates.Keywords: Solanum tuberosum. Sandy soil. Clayey soil. Dry matter. Phosphorus accumulation.ADUBAÇÃO FOSFATADA E TEXTURA DO SOLO INFLUENCIAM NA PRODUTIVIDADE DA BATATA RESUMO -A batata (Solanum tuberosum L.) é uma cultura nutricionalmente exigente e o fósforo (P) é um dos nutrientes que exerce grande efeito sobre a produtividade de tubérculos. Porém, como a disponibilidade de P é influenciada pela textura do solo, existem dúvidas de como o fornecimento de P afeta o crescimento e a produtividade das plantas de batata em solos de texturas diferentes. Assim, objetivou-se com esta pesquisa avaliar o efeito da adubação fosfatada e da textura do solo na nutrição, crescimento, produtividade e eficiência de uso (EU) do P das plantas de batata. O experimento foi conduzido em casa de vegetação no delineamento de blocos casualizados em esquema fatorial 4×2, com cinco repetições. Os tratamentos foram representados por quatro doses de P (10, 50, 100 e 200 mg dm -3 P) e duas texturas de solo (argiloso e arenoso). Os teores foliares de P, Ca e Mg foram maiores no solo arenoso e as doses de P aumentaram os teores de N, P e Ca nas folhas. A adubação fosfatada aumentou o crescimento das plantas, a quantidade de P acumulada na parte aérea e a produtividade de tubérculos em ambos os solos, porém, de forma mais expressiva e até maiores doses na batata cultivada no solo argiloso. A EU do P aplicado não foi afetada pela textura do solo. Na batata cultivada no solo arenoso, a EU do P absorvido foi reduzida em função da diminuição na produção de MS e aumento nos teores de P nos órgãos da planta com fornecimento de altas doses de P.Palavras-chave: Solanum tuberosum. ...

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Section: Resultsmentioning

confidence: 97%

Phosphorus Fertilization and Soil Texture Affect Potato Yield

et al. 2018

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“…At low pH, M3 is expected to be highly efficient at extracting Al-related P (Figure 2), likely due to the use of an acidic and fluoride-rich extraction solution, yet at low pH levels, Al-P is poorly water soluble [22], which will be reflected in plant availability [57], coinciding with the minimum water solubility (Figures 1, 6 and 7). This could help explain the common observation that potatoes often respond to P fertilizer, even under conditions where soil test P is optimum [58], as potatoes are mostly grown in fairly acidic soils. Mehlich-3 is generally a poor extractor of Fe compared to Al, partly due to the lack of complex formation with F − and short reaction time.…”

Section: Discussionmentioning

confidence: 99%

A Discussion on Mehlich-3 Phosphorus Extraction from the Perspective of Governing Chemical Reactions and Phases: Impact of Soil pH

et al. 2018

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Mehlich-3 (M3) is one of the most common agronomic and environmental phosphorus (P) extractants for determining P fertilizer requirements and the potential for non-point source pollution. Understanding how soil properties impact M3 extractability can improve our ability to properly use this soil test. The objectives of this study were to investigate the impact of soil pH on P extractability by M3 and water in different soils containing equal total P, and to ascertain information about mechanisms of M3-P extraction. Soil pH at four field sites was previously adjusted to a range of approximately 4.5-7.5. Soils (Grant, Dale, Teller, Easpur) were characterized, and P was extracted with M3 and water. Extraction of Mehlich-3 P decreased 40% to 55% with increasing pH, which was potentially due to changing P forms, partial neutralization of extractant pH, and consumption of extractant fluoride (F − ) by non P-containing calcium (Ca) minerals. Water-soluble P (WSP) increased with increasing pH up to pH 6-7. Mehlich-3 P and WSP were not positively correlated except for one soil type. Mehlich-3 P is best utilized with WSP as indicators of quantity and intensity, respectively. Use of M3-P alone at pH < 5.5 may overestimate solubility. Further research should examine the suitability of M3-P at pH > 7.

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“…Em solos com baixa disponibilidade de P, outros autores obtiveram aumentos maiores na produtividade de tubérculos, que variaram de 42% (BOOCK & FREIRE, 1960;FONtES et al, 1997) a 112% (ALvAREz-SáNCHEz et al, 1999. Contudo, tanto em solo de baixa como de alta disponibilidade inicial de P, os incrementos na produtividade de tubérculos observados com a aplicação de doses acima de 500kg ha -1 de P 2 O 5 foram pequenos, ou seja, entre 2,5 e 7,0% (NAvA et al, 2007;LUz et al, 2013). Neste estudo, a aplicação de doses maiores que 300 kg ha -1 de P 2 O 5 não alterou a produtividade de tubérculos comercializáveis nas duas condições de disponibilidade de P no solo, porque não afetou a massa média de tubérculos (Figuras 1a e 1b).…”

Section: Resultsunclassified

“…tubérculos grandes e com formato redondo (PáDUA, 2010), com elevado peso específico (HOCHMUtH et al, 2002), alta porcentagem de matéria seca (MS) e baixo teor de açúcares redutores (PEREIRA et al, 2007;PáDUA, 2010) Devido ao fato de a batateira ser considerada como exigente em nutrientes (FERNANDES et al, 2011), na maioria das vezes, essa cultura recebe elevadas doses de fertilizantes, a fim de garantir elevados níveis de produtividade (QUADROS et al, 2009;FERNANDES & SORAttO, 2012a), muitas vezes, sem se atentar para as características de qualidade dos tubérculos. Entre os fertilizantes utilizados no cultivo da batata, os fosfatados se destacam pelas elevadas doses que são aplicadas no momento do plantio (FERNANDES & SORAttO, 2012b) e pelo fato de ser o nutriente que oferece as maiores respostas de produtividade nos solos brasileiros (LUz et al, 2013).…”

Section: Introductionunclassified