Reactions of Phosphate Fertilizers in Soils

Sample, E. C.; Soper, R. J.; Racz, G. J.

doi:10.2134/1980.roleofphosphorus.c12

Cited by 181 publications

(75 citation statements)

References 137 publications

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“…After wetting, all monocalcium phosphate [Ca(H 2 -PO 4 ) 2 ÁH 2 O] converted to dicalcium phosphate (CaH-PO 4 Á2H 2 O). Lindsay et al 15 and Sample et al 16 also showed by x-ray diffraction analysis that dicalcium phosphate is the major product after a short period of wetting of TSP/ monocalcium phosphate in soils.…”

Section: Resultsmentioning

confidence: 98%

Determination of Phosphorus Fertilizer Soil Reactions by Raman and Synchrotron Infrared Microspectroscopy

et al. 2013

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The reaction mechanisms of phosphate-bearing mineral phases from sewage sludge ash-based fertilizers in soil were determined by Raman and synchrotron infrared microspectroscopy. Different reaction mechanisms in wet soil were found for calcium and magnesium (pyro-) phosphates. Calcium orthophosphates were converted over time to hydroxyapatite. Conversely, different magnesium phosphates were transformed to trimagnesium phosphate. Since the magnesium phosphates are unable to form an apatite structure, the plant-available phosphorus remains in the soil, leading to better growth results observed in agricultural pot experiments. The pyrophosphates also reacted very differently. Calcium pyrophosphate is unreactive in soil. In contrast, magnesium pyrophosphate quickly formed plant-available dimagnesium phosphate.

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Section: Resultsmentioning

confidence: 98%

Determination of Phosphorus Fertilizer Soil Reactions by Raman and Synchrotron Infrared Microspectroscopy

et al. 2013

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“…Solos de regiões tropicais possuem uma grande quantidade de óxidos de ferro (Fe) e de alumínio (Al) na fração argila, minerais responsáveis pela adsorção e fixação de P previamente Revista de Agricultura Neotropical, Cassilândia-MS, v. 5, n. 3, p. 10-19, jul./set. 2018. disponível na forma de ortofosfato-H 2 PO 4 - (Sample et al, 1980;Eriksson et al, 2015). Nos dois anos agrícolas, a aplicação de calcário na dose recomendada de 2 Mg ha -1 , proporcionou teor de P nas plantas acima do obtido no tratamento-controle (Tabelas 2 e 3).…”

Section: Resultsunclassified

Diagnose Foliar E Produção De Soja Após Aplicação De Resíduos Em Um Latossolo Sob Sistema Plantio Direto

Santos

Antonângelo

Deus

et al. 2018

Rev. Agric. Neotrop.

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A aplicação superficial de resíduos e o não revolvimento do solo decorrente do sistema plantio direto (SPD) favorecem os atributos químicos, físicos e biológicos do solo, afetando também a dinâmica de nutrientes ao longo do seu perfil. Além de atenuadores da acidez do solo, alguns resíduos ainda são excelentes fontes de nutrientes às plantas, dentre eles os macronutrientes, como o fósforo, o nitrogênio e o cálcio, e os micronutrientes, como o manganês e o zinco. Neste contexto, objetivou-se avaliar o estado nutricional e a produtividade de grãos da cultura da soja (Glycine max) cultivada sob SPD em um Latossolo Vermelho Distrófico submetido à aplicação superficial de resíduos industriais e urbanos. O delineamento experimental utilizado foi o de blocos casualizados, com quatro repetições (n=4). Os tratamentos foram constituídos por quatro resíduos: lodo de esgoto centrifugado e tratado com cal virgem (LC), lodo de esgoto de biodigestor (LB), escória de aciaria (E) e lama cal (Lcal), aplicados em quatro doses: 0 (controle), 2, 4 e 8 Mg ha-1. Houve aumento nos teores de N, P e Ca nas folhas da soja com a aplicação de doses crescentes dos resíduos. Já para o Mn e o Zn, os teores diminuíram com o aumento das doses de resíduos aplicadas, exceto para a dose 8 Mg ha-1. A aplicação crescente de doses de resíduos aumentou a produção de grãos na cultura da soja.

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“…Low PRE is predictable on many soils due to the strong interaction of this nutrient with the soil matrix. For example, strong soil‐retention of P occurs under low pH (below 6) when P is fixed by Fe and Al and under high pH (above 7) when P is fixed by Ca (Sample et al, 1980). Thus more plant‐available P would be expected for a given P fertilization rate when soil pH ranges between 6 and 7 units.…”

Section: Resultsmentioning

confidence: 99%

Understanding Global and Historical Nutrient Use Efficiencies for Closing Maize Yield Gaps

Ciampitti

Vyn

2014

Agronomy Journal

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Global food security must address the dual challenges of closing yield gaps (i.e., actual vs. potential yield) while improving environmental sustainability. Nutrient balance is essential for achieving global food security. Historical (in distinct "Eras" from late 1800s to 2012) and geographical (in United States vs. remainder of World) changes in maize (Zea mays L.) grain yields and plant nutrient content (N, P, and K) were characterized from studies (>150) with known plant densities. At the community scale, greater yield to nutrient content ratios (physiological efficiency, PE) were documented for United States vs. World. The U.S. historical trend displayed increasing gains for community-scale yield and nutrient uptake, except for a recent decline attributed to weather. At the individual-plant scale, geographic PE differences over time were primarily explained by changes in yield, and secondarily by nutrient content changes. Despite wide variation, high-yield maize in both geographies was associated with balanced N/P (5:1) and N/K (1:1) ratios. More scope exists for maize nutrient PE gains in developing regions. Achieving balanced nutrition in optimally integrated soil-crop management cropping systems will facilitate simultaneous realization of high-yield and bio-fortification goals in maize improvement efforts.

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Reactions of Phosphate Fertilizers in Soils

Cited by 181 publications

References 137 publications

Determination of Phosphorus Fertilizer Soil Reactions by Raman and Synchrotron Infrared Microspectroscopy

Determination of Phosphorus Fertilizer Soil Reactions by Raman and Synchrotron Infrared Microspectroscopy

Diagnose Foliar E Produção De Soja Após Aplicação De Resíduos Em Um Latossolo Sob Sistema Plantio Direto

Understanding Global and Historical Nutrient Use Efficiencies for Closing Maize Yield Gaps

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