Adsorção de fósforo em frações argila na presença de ácido fúlvico

Cessa, Raphael Maia Aveiro; Vitorino, Antônio Carlos Tadeu; Celi, Luisella; Novelino, José Oscar; Barberis, Elisabetta

doi:10.1590/s0100-06832010000500006

Cited by 12 publications

(10 citation statements)

References 25 publications

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“…Although acidity increases phosphate adsorption, compromising the desorption of this anion, the positive action of fulvic acid on P desorption was also found in clay of Latosols with pH 4.5 (Cessa et al, 2010), as observed in the present study.…”

Section: Resultssupporting

confidence: 87%

“…On the other hand, with highest P dose (107.4 µg P g -1 ) the added amount was six times lower than this capacity. Since the sites of higher binding energy of P to the adsorbents decrease as P saturation increases (Borggaard et al, 2005;Guppy et al, 2005;Cessa et al, 2010;Fu et al, 2013), this may have influenced the effects of HAs observed in the treatments with highest P dose.…”

Section: Resultsmentioning

confidence: 99%

“…In general, the effect of HAs on P content have been reported in studies that use larger amounts than the recommended one to correct P deficiency in agricultural soils (Hua et al, 2008;Cessa et al, 2010). Besides being uneconomic, high P doses reduce the adsorption sites that retain this nutrient with greater energy (Guppy et al, 2005), which may lead to overestimation of the observed effects.…”

Section: Introductionmentioning

confidence: 99%

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Modifications of phosphorus in Latosol as a function of humic acids and acidity

Beck

Escosteguy

Dick

2018

Rev. bras. eng. agríc. ambient.

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Palavras-chave:fosfato sorção substâncias húmicas A B S T R A C TThe effect of humic acids (HA) on phosphorus (P) availability is still contradictory; thus, it is necessary to identify the conditions that play a crucial role in this effect. The aim of this study was to investigate the effect of HA application, combined with doses of P, on the content of this nutrient in a Latosol with and without acidity correction. Two experiments were carried out, one with HA from peat and another with HA from mineral charcoal (leonardite). Doses of these acids (0; 1.12 and 5.62 mg C g -1 of soil) and P (26.2 and 104.7 mg P g -1 of soil, 1 and 4-fold higher than recommended, respectively) were tested at soil pH 4.5 and 7.0, in a three-factorial design. The soil was incubated for 20 days and the soil-P content was measured by Mehlich-1 and remaining-P tests. The effect of HAs on P availability varied with the P doses and soil acidity. Humic acids application increases P content in Latosol when P dose is higher than recommended and there is no acidity correction (pH 4.5). However, there is no effect of HAs application on soil-P content when applying the recommended amount of this nutrient, irrespective of the pH value.Modificações de fósforo em Latossolo em função de ácidos húmicos e acidez R E S U M O O efeito de ácidos húmicos (AH) na disponibilidade de fósforo (P) ainda é contraditório. Assim, é necessário identificar as principais condições que podem influenciar esse efeito. Com o trabalho, objetivou-se investigar o efeito da aplicação de AH, combinada com doses de P, no teor desse nutriente em Latossolo com e sem correção de acidez. Foram conduzidos dois experimentos, um com AH extraído de turfa e outro com AH extraído de carvão mineral (leonardita). Doses desses ácidos (0; 1,12 e 5,62 mg C g -1 de solo) e de P (26,2 e 104,7 mg P g -1 de solo, 1 e 4 vezes maior que o recomendado, respectivamente) foram testadas, em dois valores de pH do solo (4,5 e 7,0), em esquema trifatorial. O solo foi incubado por 20 dias e os teores de P foram extraídos com os métodos Mehlich-1 e P remanescente. O efeito dos AHs na disponibilidade desse nutriente variou com as doses de P e o pH do solo. A adição desses ácidos aumenta o teor desse nutriente em latossolo somente quando a dose de correção de P for maior que a recomendada e a acidez (pH 4,5) não for corrigida. Por outro lado, os AHs não influenciam o teor desse nutriente quando a dose de correção aplicada corresponder à quantidade recomendada, independentemente do pH do solo.

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Section: Resultssupporting

confidence: 87%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Modifications of phosphorus in Latosol as a function of humic acids and acidity

Beck

Escosteguy

Dick

2018

Rev. bras. eng. agríc. ambient.

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“…With the dose of 78.9 m 3 ha -1 , P content reached 14.78 mg dm -3 as a result of the content of P present in the effluent. In the lower layers there were no significant differences (p > 0.05); this is likely due to the characteristic of phosphate ions, which have a high affinity for the clay mineral fraction, particularly iron and aluminum oxides; this means that P becomes adsorbed on the soil and thus has low mobility (CESSA et al, 2010).…”

Section: +mentioning

confidence: 88%

Soil chemical alterations of a Dystroferric Red Latosol (Oxisol) treated with an alkaline effluent from a pharmaceutical industry

Neto

Batista

Inoue

et al. 2016

SCA

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Effluents from different industrial supply conglomerates are often discarded in the environment without proper treatment. The concern for an economically viable industrial production line, which is both environmentally sound and socially acceptable, is increasing. Some of these effluents are alkaline in nature and may be used as an alternative to chemical conditioners for acidic soils in agricultural systems. This research aimed to evaluate changes in the chemical attributes of a Dystroferric Red Latosol (Oxisol) after application of an effluent from a pharmaceutical industry. The experiment was conducted in a greenhouse using PVC tubes of 1-m length and a 0.2-m diameter filled with soil and different doses of the effluent. After 3 days, 100 mm of water was applied to each treatment. The PVC tubes were incubated for 30 days; thereafter, the tubes disassembled, and soil chemical analysis were ResumoOs efluentes das diversas cadeias produtivas industriais são muitas vezes descartados no ambiente sem tratamento adequado. A preocupação por uma linha de produção industrial economicamente viável, ambientalmente correta e socialmente aceita é cada vez mais preconizada. Alguns desses efluentes apresentam caráter alcalino, e podem ser utilizados como condicionadores químicos de solos ácidos, em sistemas agrícolas. Objetivou-se com a realização do presente trabalho, avaliar alterações químicas de um LATOSSOLO VERMELHO distroférrico, após aplicação de efluente da indústria farmacêutica. O experimento foi realizado em casa de vegetação e conduzido em tubos de PVC de 1 m de comprimento e 0,2 m de diâmetro. Nos tubos, preenchidos com solo, foram aplicadas diferentes doses do efluente. Após 3 dias, 100 mm de água foi aplicado sobre cada tratamento. As colunas foram incubadas por 30 dias, posteriormente desmontadas e feitas análises químicas nas diferentes profundidades: 0-0,2; 0, 2-0,4; 0,4-0,6; 0,6-0,8 e 0,8-1,0

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“…P available for assimilation by plants (Guppy et al, 2005). However, according to Matias (2010) and Cessa et al (2010), high doses of HSs have negative effect on the availability of P, because they favor the formation of organometallic complexes and their adsorption. Andrade et al (2007) compared the use of humic acids, acetic acid and citric acid, and concluded that the addition of humic acids promoted the best results for corn, which led to greater accumulations of biomass and P in the plants.…”

Section: Dmentioning

confidence: 99%

Liquid organomineral fertilizer containing humic substances on soybean grown under water stress

Prado

Weber

Moraes

et al. 2016

Rev. bras. eng. agríc. ambient.

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A B S T R A C TThis study evaluated the effect of an organomineral fertilizer enriched with humic substances on soybean grown under water stress. The experiment was performed in a greenhouse using a Red Latosol (Oxisol) with adequate fertility as substrate, in which soybean plants were cultivated with and without water stress. The experimental design was randomized blocks, in a 2 x 5 factorial scheme (two moisture levels and five fertilizer doses: 0, 1, 2, 4 and 8 mL dm -3 ), totaling 10 treatments, with four replicates. The organomineral fertilizer was applied in the soil 21 days after plant emergence and the water regimes were established one week thereafter. The fertilizer was not able to attenuate the effects of water stress, reducing soybean grain yield by more than 50% compared with plants cultivated under no stress. Fertilizer doses caused positive response on soybean nutrition and grain yield and, under water stress condition, the most efficient dose was 5.4 mL dm -3 . There were lower leaf concentrations of nitrogen, phosphorus and potassium and higher concentrations of sulfur in plants under stress. Humic substances favor the absorption of micronutrients.Fertilizante organomineral líquido contendo substâncias húmicas em soja cultivada sob estresse hídrico R E S U M O Avaliou-se, neste trabalho, o efeito de um fertilizante organomineral enriquecido com substâncias húmicas em soja submetida a estresse hídrico. Em casa de vegetação foi realizado um experimento utilizando-se, como substrato, um Latossolo Vermelho com nível de fertilidade adequado no qual foram cultivadas plantas de soja em duas condições, sem e com estresse hídrico. O delineamento foi em blocos casualizados em esquema fatorial 2 x 5 (dois níveis de umidade e cinco doses: 0, 1, 2, 4 e 8 mL dm -3 ) totalizando 10 tratamentos, com 4 repetições. O fertilizante organomineral foi aplicado ao solo 21 dias após a emergência das plantas estabelecendo-se, uma semana após sua aplicação, os níveis de umidade. O fertilizante organomineral não foi capaz de atenuar os efeitos adversos do estresse hídrico reduzindo a produtividade dos grãos de soja em mais de 50% quando comparado às plantas cultivadas sem estresse hídrico. Houve resposta positiva quanto às doses sobre a nutrição e produtividade de grãos sendo que, na condição de estresse hídrico, a mais eficiente foi 5,4 mL dm -3 ; foi menor a concentração foliar de nitrogênio, fósforo e potássio nas plantas com estresse e maior concentração de enxofre; as substâncias húmicas favorecem a absorção de micronutrientes. Key words:humic and fulvic acids biostimulants plant mineral nutrition Palavras-chave: ácidos húmicos e fúlvicos bioestimulantes nutrição mineral de plantas

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Adsorção de fósforo em frações argila na presença de ácido fúlvico

Cited by 12 publications

References 25 publications

Modifications of phosphorus in Latosol as a function of humic acids and acidity

Modifications of phosphorus in Latosol as a function of humic acids and acidity

Soil chemical alterations of a Dystroferric Red Latosol (Oxisol) treated with an alkaline effluent from a pharmaceutical industry

Liquid organomineral fertilizer containing humic substances on soybean grown under water stress

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