Atividade e especiação química na solução afetadas pela adição de fósforo em latossolo sob plantio direto em diferentes condições de acidez

Nolla, Antônio; Anghinoni, Ibanor

doi:10.1590/s0100-06832006000600005

Cited by 20 publications

(20 citation statements)

References 13 publications

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“…Álvarez et al (2002) reported that the AlSO 4 + species rarely occurred in Spanish soils with different parent materials. Nolla & Anghinoni (2006) verified that aluminum phosphate was not present in the soil solution of an Oxisol under NT, even after the application of high rates of P. Figure 2, representing, when added up, less than 1% of the total Ca species. The levels of association of Ca Table 3 with chloride and nitrate in this study are in accordance with Adams (1971), who stated that ionic pairs with these anions do not occur or are negligible, while sulfates can have a more expressive association.…”

Section: Resultsmentioning

confidence: 75%

“…Nevertheless, studies that also focus on the soil solution under NT, especially through chemical speciation, are scarce. In a recent study with samples of an Oxisol collected in areas of distinct acidity conditions, and later placed in columns with several rates of phosphorus, Nolla & Anghinoni (2006) pointed out the importance of chemical speciation in the evaluation of the phytotoxic potential of aluminum in soils cultivated under the NT system.…”

Section: Introductionmentioning

confidence: 99%

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Liming and Ionic speciation of an Oxisol under no-till system

Zambrosi

Alleoni²,

Caires³

2008

Sci. agric. (Piracicaba, Braz.)

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The chemical speciation of the soil solution is an important tool for evaluating nutrient availability and aluminum phytotoxicity. The effect of liming in the composition of the soil solution under the no-till (NT) system is still not well known. We evaluated the chemical speciation of Al and nutrients in the soil solution (water extract 1:1), five years after liming at the moment of the establishment of NT in a native pasture, in Ponta Grossa, Paraná State, Brazil. Dolomitic lime was applied at a rate of 4.5 t ha -1 (either incorporated or surface-applied), or split in three annual rates of 1.5 t ha CALAGEM E ESPECIAÇÃO IÔNICA DE UM LATOSSOLO SOB SISTEMA PLANTIO DIRETORESUMO: A especiação química da solução do solo é uma importante ferramenta para avaliar a disponibilidade de nutrientes e o potencial fitotóxico do alumínio. As formas em que os elementos ocorrem na solução dos solos sob sistema plantio direto (SPD) ainda são pouco conhecidas, sobretudo em áreas que receberam aplicação de calcário. Avaliou-se a distribuição das espécies químicas de alumínio e nutrientes na solução do solo (extrato aquoso 1:1), cinco anos após a aplicação de calcário, na introdução do SPD em área de pastagem nativa, em Ponta Grossa -PR. Aplicaram-se 4,5 t ha -1 de calcário dolomítico na superfície, em dose única ou parcelada durante três anos, ou com incorporação na camada de 0 -0,20 m, de um Latossolo Vermelho distrófico textura argilosa. As amostras de solo foram coletadas nas profundidades de 0 -0,05; 0,05 -0,1; 0,1 -0,2; 0,2 -0,4; 0,4 -0,6 e 0,6 -0,8 m. O alumínio (Al) ocorreu predominantemente complexado pelo carbono orgânico dissolvido (DOC) e pelo fluoreto, e em baixíssimas proporções na forma livre Al 3+ , mesmo em condições de alta acidez. Para cálcio (Ca) e magnésio (Mg), as espécies químicas que ocorreram em maiores proporções foram as formas livres (Ca 2+ e Mg 2+ ) e complexadas pelo DOC. O fósforo, além das formas livres (H 2 PO 4 -, HPO 4 2-), interagiu com alumínio (par iônico Al-H x PO 4 x ), sobretudo até 0,1 m de profundidade. A complexação do alumínio pelo carbono orgânico dissolvido não foi influenciada pela correção da acidez do solo por meio da calagem na superfície ou com incorporação. A aplicação de calcário não alterou a especiação de cálcio e magnésio na solução do solo sob sistema plantio direto. Contudo, a ocorrência das formas livres H 2 PO 4 -e HPO 4 2-foi influenciada pela calagem, havendo incremento das formas associadas com cátions. Palavras-chave: calcário dolomítico, complexos, par iônico, carbono orgânico dissolvido

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Section: Resultsmentioning

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Liming and Ionic speciation of an Oxisol under no-till system

Zambrosi

Alleoni²,

Caires³

2008

Sci. agric. (Piracicaba, Braz.)

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“…This saturation was significantly lower at the surface, coinciding with the high levels of OM. Previous research has shown that the effects of the organic compounds of low molecular weight from plant residues and manures in reducing aluminum concentrations in soil solution are attributable to both an increase in pH and the complexing ability of OM for Al (Miyazawa et al, 1993;Naramabuye & Haynes, 2006;Nolla & Anghinoni, 2006).…”

Section: Resultsmentioning

confidence: 99%

Humic Haplustox under different land uses in a high altitude environment in the Agreste region of Pernambuco, Brazil

Araújo

Ribeiro

Corrêa

et al. 2014

Rev. Bras. Ciênc. Solo

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SUMMARYThe Garanhuns Plateau in the Agreste region of the State of Pernambuco, Brazil is characterized by humid climatic conditions due to orographic rains, unlike the surrounding semiarid region. These soils are subjected to intense agricultural use and are extremely important for the regional economy. This study was carried out in the municipality of Brejão in the Agreste region with the aim of assessing changes in humic Haplustox soils subjected to different land uses. Four plots with different vegetation covers (native forest, secondary shrubby vegetation (capoeira), traditional cropping system, and planted pasture) were selected, and samples were taken from a soil profile and four small pits surrounding it at each site. Physical and chemical properties were assessed, including aggregate stability, humic organic fractions, and a microbiological evaluation through determination of basal respiration, microbial biomass carbon, and metabolic quotient. The soils under study showed physical and chemical properties typical of a Haplustox, such as low nutrient content, low cation exchange capacity, and high levels of acidity and Al saturation. The total organic carbon (TOC) contents were high regardless of the type of land use. Aggregates < 2 mm were dominant in all the conditions under study. The TOC content was higher in the soil under capoeira, 43.91 g kg -1 on the surface, while 34.36 and 33.43 g kg -1 of TOC were observed in the first layer of forest and pasture soils, respectively. While the microbial biomass C (MBC) was greater than 700 mg kg -1 in the forest and pasture areas (in the 0-5 cm layer), and 588 mg kg -1 in the soil under capoeira, these numbers were not statistically different. In the cultivated soil area, there was a reduction of around 28 % in TOC and MBC contents. Agricultural activity contributed to degradation of the humic 1338 horizon, as can be seen from a significant decrease in the TOC and changes in the relative distribution of the humic fractions. In contrast, aggregate stability was not altered as a function of the different land uses; the soil under planted pasture and capoeira were similar to the soil under native forest. Humin was the most important humified fraction for C reserves, contributing over 40 % of the TOC in these soils.Index terms: land use, highland soils, humic substances, aggregate stability, microbial biomass C. RESUMO: LATOSSOLOS AMARELOS HÚMICOS SOB DIFERENTES TIPOS DE UTILIZAÇÃO EM UM AMBIENTE ALTIMONTANO NO AGRESTE DE PERNAMBUCOO Planalto de Garanhuns, no Agreste de Pernambuco, destaca-se por apresentar características climáticas privilegiadas, favorecidas pelas chuvas orográficas, distinguindose da região semiárida circundante. Essas áreas mais úmidas são conhecidas como "brejos de altitude" e intensamente utilizadas e importantes para a economia regional. Este trabalho foi desenvolvido no município de Brejão, Agreste de Pernambuco, com o objetivo de identificar alterações nos atributos de Latossolos Amarelos Húmicos, submetidos às diferentes formas de uso do s...

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“…The lower proportion of AlHPO 4 + in the 1 st sampling in the soil solution after PS applications of 40 and 80 m 3 ha -1 , especially in the 0-5 cm layer, can be attributed to the higher DOC concentration (Table 1), since Al 3+ has greater affinity to organic compounds than to phosphate (Nolla and Anghinoni, 2006). However, the reduction in AlHPO 4 + in soil solution in all treatments in the 2 nd sampling probably occurred because of the increase in the pH of the solution in response to the crops.…”

Section: Discussionmentioning

confidence: 98%

“…Continued applications of PS, a multielement fertilizer, are expected to induce changes in the chemical composition and distribution of P species in the soil solution, together with crop cultivation, which can alter the concentration of elements in the soil solution by absorption and accumulation in plant tissues, by exudation of organic compounds and by changes in pH through the release of OH -or H + (Gahoonia et al, 1992). The P species in soil solution can be estimated with specific software such as Visual Minteq, since P bioavailability and mobility depend on the concentration and chemical species in the solution (Nolla and Anghinoni, 2006;Zambrosi et al, 2007;Girotto et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Effects of Pig Slurry Application and Crops on Phosphorus Content in Soil and the Chemical Species in Solution

Conti

Ceretta

Ferreira

et al. 2015

Rev. Bras. Ciênc. Solo

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the application of pig slurry rates and plant cultivation can modify the soil phosphorus (P) content and distribution of chemical species in solution. the purpose of this study was to evaluate the total P, available P and P in solution, and the distribution of chemical P species in solution, in a soil under longstanding pig slurry applications and crop cultivation. the study was carried out in soil columns with undisturbed structure, collected in an experiment conducted for eight years in the experimental unit of the universidade federal de santa maria (ufsm), santa maria (rs). the soil was an Argissolo Vermelho distrófico arênico (typic hapludalf), subjected to applications of 0, 20, 40, and 80 m 3 ha -1 pig slurry. soil samples were collected from the layers 0-5, 5-10, 10-20, 20-30, 30-40, and 40-60 cm, before and after black oat and maize grown in a greenhouse, for the determination of available P, total P and P in the soil solution. in the solution, the concentration of the major cations, anions, dissolved organic carbon (doc), and ph were determined. the distribution of chemical P species was determined by software Visual minteq. the 21 pig slurry applications increased the total P content in the soil to a depth of 40 cm, and the P extracted by mehlich-1 and from the solution to a depth of 30 cm. successive applications of pig slurry changed the balance between the

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Atividade e especiação química na solução afetadas pela adição de fósforo em latossolo sob plantio direto em diferentes condições de acidez

Abstract: RESUMO

Cited by 20 publications

References 13 publications

Liming and Ionic speciation of an Oxisol under no-till system

Liming and Ionic speciation of an Oxisol under no-till system

Humic Haplustox under different land uses in a high altitude environment in the Agreste region of Pernambuco, Brazil

Effects of Pig Slurry Application and Crops on Phosphorus Content in Soil and the Chemical Species in Solution

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