Organic N mineralization and transformations in soils treated with animal waste in relation to carbonate dissolution and precipitation

Tamir, Guy; Shenker, Moshe; Heller, Hadar; Bloom, Paul R.; Fine, Pinchas; Bar‐Tal, Asher

doi:10.1016/j.geoderma.2013.05.028

Cited by 34 publications

(17 citation statements)

References 30 publications

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“…The soil AC9 was an exception, for it presented an inverse behavior, with reduction of EC after soybean cultivation (data not shown). This reduction is related to the Ca 2+ and Mg 2+ contents and can be explained by the buffering power of each soil presented on the increase of EC, by the content of OM, clay and CEC and by the precipitation and adsorption of other processes that remove ions from the liquid phase of the soil (Tamir et al, 2013).…”

Section: /10mentioning

confidence: 96%

Composition, chemical speciation and activity of ions in the solution of Brazilian acid soils

Cunha

Almeida

Ernani

et al. 2018

Agraria

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The knowledge of the chemical composition of the soil solution through chemical speciation is important for the monitoring of nutrient availability, soil fertility management and plant nutrition. The objective of this study was to evaluate the chemical composition and activity of Al, cations and anions by chemical speciation in solution of some Brazilian acid soils (AC, PE, RS and SC) submitted to liming and cultivated with soybean and maize plants. In addition, to identify the chemical elements responsible for the reduction of Al activity in the solution and its toxicity to plants. The predominant aluminum, calcium, magnesium, potassium, sulfate, chloride and nitrate species in all soils were: Ca 2+ and Mg 2+ , K + , SO 4 2-, Cland NO 3 in all soils. In the treatments without limestone in the soils AC9, RS and CB predominated the species of P H 2 PO 4 and in the soils PE and BR was the AlHPO 4 + . However, with liming the P form that predominated in all soils was H 2 PO 4 and, to a lesser extent, HPO 4 2-. The activity of the Ca 2+ and Mg 2+ ions was the main responsible for the neutralization of the toxic effects of Al 3+ in the evaluated plants.Composição, especiação química e atividade de íons na solução de solos ácidos brasileiros RESUMO: O conhecimento da composição química da solução do solo, por meio da especiação química, é importante para o acompanhamento da disponibilidade de nutrientes para o manejo da fertilidade do solo e da nutrição de plantas. O estudo objetivou avaliar a composição química e a atividade do Al, dos cátions e dos ânions, por meio da especiação química, na solução de alguns solos ácidos brasileiros (AC, PE, RS e SC) submetidos à calagem e cultivados com plantas de soja e milho. Além disso, identificar os elementos químicos responsáveis pela redução da atividade do Al na solução e sua toxidez às plantas. As espécies químicas de alumínio, cálcio, magnésio, potássio, sulfato, cloreto e nitrato predominantes em maiores proporções em todos os solos foram: Al 3+ , Ca 2+ e Mg 2+ , K + , SO 4 2-, Cle NO 3 -. Nos tratamentos sem calcário nos solos AC9, RS e CB predominou a espécie de P H 2 PO 4 e nos solos PE e BR foi a AlHPO 4 + . Porém, com a calagem a forma de P que predominou em todos os solos foi a H 2 PO 4 e, em menor proporção, a HPO 4 2-. A atividade dos íons Ca 2+ e Mg 2+ foi a principal responsável pela neutralização dos efeitos tóxicos do Al 3+ nas plantas avaliadas. Palavras-chave: ânions; calcário dolomítico; cátions; complexos; plantas Composition, chemical speciation and activity of ions in the solution of Brazilian acid soils Rev. Bras. Cienc. Agrar., Recife, v.13, n.3, e5542, 2018 2/10

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Section: /10mentioning

confidence: 96%

Composition, chemical speciation and activity of ions in the solution of Brazilian acid soils

Cunha

Almeida

Ernani

et al. 2018

Agraria

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“…The soil cation-exchange capacity (CEC) was determined using the buffered salt extraction method [26]. The available N (NH 4 + and NO 3 − ) was extracted using 2 M KCl in a 1:10 soil:extract volume [27] and the concentration of these ions was then determined using colorimetric methods on a Technicon auto-analyzer [28]. The soil organic C (SOC) was determined using finely-ground samples (<250 µm) by rapid dichromate oxidation [29], while the total soil nitrogen (TN) was determined from Kjeldahl digests that were analyzed by steam distillation on a Labconco II Rapidstill [30].…”

Section: Analysis Of Soils and Organic Residuesmentioning

confidence: 99%

Organic Residues and Ammonium Effects on CO2 Emissions and Soil Quality Indicators in Limed Acid Tropical Soils

2019

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Aglime (agricultural lime), commonly applied to acid soils to increase the soil pH and productivity, may lead to the release of CO2 into the atmosphere or to carbon (C) sequestration, although the processes involved are not fully understood. As large acreages of arable land are limed annually, exploring soil management practices that reduce aglime-induced CO2 emissions from acid soils while maintaining or improving the soil quality is paramount to mitigating the effects of global climate change. This study, therefore, assessed the effects of organic residues and ammonium on CO2 emissions and soil quality indicators in two limed soils. Two contrasting acid soils (Nariva series, Mollic Fluvaquents and Piarco series, Typic Kanhaplaquults) were amended with varying combinations of aglime (0% and 0.2% w/w CaCO3), organic residue (0% and 5% w/w biochar or poultry litter), and NH4-N (0% and 0.02% w/w) and were incubated in 300 mL glass jars for 31 days. The sampling for CO2 was performed on 11 occasions over the course of the incubation, while soil sampling was conducted at the end. The results indicate that aglime application significantly (p < 0.05) increased the cumulative CO2 emissions in all cases except with the addition of poultry litter. Alternatively, ammonium did not regulate the effect of aglime on CO2 emissions, which was l because of the low rate at which it was applied in comparison to aglime. The results also showed that poultry litter significantly (p < 0.05) increased the soil electrical conductivity (EC), available nitrogen (N), and pH, especially in the Piarco soil, while the hardwood biochar had little to no effect on the soil properties. Our findings indicate the potential for utilizing poultry litter to reduce the impact of aglime on CO2 emissions while improving the soil quality. Further studies utilizing 13C to trace aglime CO2 emissions are, however, required to identify the mechanism(s) that contributed to this reduction in the emissions.

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“…, seu excesso em solo pode levar à diminuição da CE, quando ela ocorre, possivelmente, em razão da formação de sais insolúveis de Ca com outros co-íons, o que reduz a condução de corrente elétrica no solo (Tamir et al, 2013 , são justificadas pelo poder tampão que cada solo apresenta sobre o aumento da CE, que pode ser explicado pela MO, argila e CTC, e pelas reações de precipitação e de adsorção e de outros processos que retiram íons da fase líquida do solo. Este tamponamento da CE ocorre graças aos teores contrastantes de MO, argila e de outros condicionantes que exercem influência sobre o poder tampão do solo (Xu et al, 2012;Heiniger et al, 2003).…”

Section: Methodsunclassified

Condutividade elétrica e crescimento do milho em solos contrastantes sob aplicação de diversos níveis de calagem

Carmo

Silva

2016

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi avaliar o efeito da aplicação de níveis crescentes de calagem sobre a condutividade elétrica de solos contrastantes quanto à textura e aos teores de matéria orgânica, assim como o grau de associação da condutividade elétrica e da concentração de nutrientes com a massa de matéria seca total de milho. A condutividade elétrica e os teores disponíveis de macro e micronutrientes foram determinados, tendo-se calculado a concentração de nutrientes de solos incubados com doses crescentes de CaCO 3 +MgCO 3 . Determinou-se o grau de associação da condutividade elétrica com os atributos de fertilidade e de acidez de cada solo e com a massa de matéria seca de milho, cultivado por 35 dias em vaso. A condutividade elétrica aumenta com o acréscimo dos níveis de calagem e se correlaciona positivamente ao pH, à saturação por bases, aos teores de Ca 2+ e de Mg 2+ e à concentração de nutrientes. Não há uma equação universal que relacione os dados de condutividade elétrica com os atributos dos dez solos investigados e com a massa de matéria seca total de milho. Para cada solo, há relação direta entre a condutividade elétrica e a massa de matéria seca de milho, e entre a condutividade elétrica e a concentração de nutrientes.Termos para indexação: atributos de acidez do solo, disponibilidade de nutrientes, matéria orgânica, solução do solo, textura do solo. Electrical conductivity and corn growth in contrasting soils affected by liming application at various levelsAbstract -The objective of this work was to evaluate the effect of the application of increasing liming levels on the electrical conductivity of soils contrasting for texture and contents

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Organic N mineralization and transformations in soils treated with animal waste in relation to carbonate dissolution and precipitation

Cited by 34 publications

References 30 publications

Composition, chemical speciation and activity of ions in the solution of Brazilian acid soils

Composition, chemical speciation and activity of ions in the solution of Brazilian acid soils

Organic Residues and Ammonium Effects on CO2 Emissions and Soil Quality Indicators in Limed Acid Tropical Soils

Condutividade elétrica e crescimento do milho em solos contrastantes sob aplicação de diversos níveis de calagem

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