Phosphorus availability in boreal forest soils: A geochemical and nutrient uptake modeling approach

Ohno, Tsutomu; Amirbahman, Aria

doi:10.1016/j.geoderma.2009.11.022

Cited by 35 publications

(15 citation statements)

References 33 publications

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“…Year results also confirm a clear relation between soil pH and the P availability which have been shown by several modellers (Devau et al, 2009;Ohno and Amirbahman 2010). Moreover, the levels of WSP observed in this study (0.70-3.87 mg kg À1 ) were lower than those found by Nair et al (2007) in the surface soil of a silvopastoral system established in Florida with Pinus elliotti (4.23 mg kg À1 ) and in areas of treeless pasture (9.11 mg kg À1 ).…”

Section: Variablessupporting

confidence: 88%

Phosphorous dynamics in poplar silvopastoral systems fertilised with sewage sludge

Ferreiro-Domínguez

Nair

Freese

2016

Agriculture, Ecosystems & Environment

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Section: Variablessupporting

confidence: 88%

Phosphorous dynamics in poplar silvopastoral systems fertilised with sewage sludge

Ferreiro-Domínguez

Nair

Freese

2016

Agriculture, Ecosystems & Environment

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“…To better manage soil P for maximum bioavailability, a clearer understanding of both sorption and desorption is necessary because they are the processes that, along with P mineralization, control soil solution P concentration; hence P bioavailability. Organic matter additions have long been used in the tropics to enhance P cycling and bioavailability by reducing P sorption sites (Ohno et al ., ; Ohno & Amirbahman, ). Biochar is expected to act in the same fashion while adding a limited supply of essential nutrients to the soil (Glaser et al ., ; Lehmann et al ., ).…”

Section: Introductionmentioning

confidence: 97%

Sorption and desorption of phosphate on biochar and biochar–soil mixtures

Morales

Comerford

Guerrini

et al. 2013

Soil Use and Management

111

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The term biochar refers to materials with diverse chemical, physical and physicochemical characteristics that have potential as a soil amendment. The purpose of this study was to investigate the P sorption/desorption properties of various slow biochars and one fast pyrolysis biochar and to determine how a fast pyrolysis biochar influences these properties in a degraded tropical soil. The fast pyrolysis biochar was a mixture of three separate biochars: sawdust, elephant grass and sugar cane leaves. Three other biochars were made by slow pyrolysis from three Amazonian tree species (Lacre, Ingá and Embaúba) at three temperatures of formation (400 °C, 500 °C, 600 °C). Inorganic P was added to develop sorption curves and then desorbed to develop desorption curves for all biochar situations. For the slow pyrolysis, the 600 ºC biochar had a reduced capacity to sorb P (4–10 times less) relative to those biochars formed at 400 °C and 500 °C. Conversely, biochar from Ingá desorbed the most P. The fast pyrolysis biochar, when mixed with degraded tropical mineral soil, decreased the soil's P sorption capacity by 55% presumably because of the high soluble, inorganic P prevalent in this biochar (909 mg P/kg of biochar). Phosphorus desorption from the fast pyrolysis biochar/soil mixture not only exhibited a common desorption curve but also buffered the soil solution at a value of ca. 0.2 mg/L. This study shows the diversity in P chemistry that can be expected when biochar is a soil amendment and suggests the potential to develop biochars with properties to meet specific objectives.

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“…The recovery of phosphorus by plants from applied fertilizer is limited in acidic soils due to P fixation. In acidic soils, the P is fixed by high-energy sorption surfaces such as oxides and hydroxides of Fe and Al by formation of insoluble Fe and Al phosphates by ligand exchange and precipitation reactions (Ohno and Amirbahman, 2010). The availability of P is influenced by soil organic matter, pH, and exchangeable and soluble Al and Fe.…”

Section: Introductionmentioning

confidence: 99%

Improving available phosphorus in acidic soil using biochar

Dume¹,

Ayele²,

Regassa³

et al. 2017

J. Soil Sci. Environ. Manage.

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Understanding of phosphorus (P) retention and release mechanisms provides crucial information for the effective management of phosphorus to enhance crop production and sustain soil. In acidic soil, available phosphorus is fixed by aluminum and iron. To overcome this problem, soils are limed to fix aluminum and iron. But this practice is not economical for small scale farmers and also it is not environmentally friendly. This study was conducted to improve phosphorus availability using biochar produced from coffee husk and corn cob to fix aluminum and iron instead of phosphorus. Acidic soil samples were mixed with biochar applied at the rates of 0, 5, 10 and 15 t ha -1 and incubated in laboratory for 2 months at ambient temperature. The results showed significant effects (p<0.01) on selected soil chemical properties by increasing soil pH and reduced exchangeable acidity, exchangeable aluminum, and exchangeable iron in a way that enhanced the availability of phosphorus. Due to the incorporation of biochar the available P level increased to a level ranging 3.64±0.34 -23.21±0.07 mg/kg after an incubation period of 2 months and it increased by 84.3% available phosphorus when coffee husk biochar produced at 500°C temperature was applied at a rate of 15t/ha. Moreover, further field researches are needed to evaluate the effect of biochar on availability, the fate and uptake of available P in soil.

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Phosphorus availability in boreal forest soils: A geochemical and nutrient uptake modeling approach

Cited by 35 publications

References 33 publications

Phosphorous dynamics in poplar silvopastoral systems fertilised with sewage sludge

Phosphorous dynamics in poplar silvopastoral systems fertilised with sewage sludge

Sorption and desorption of phosphate on biochar and biochar–soil mixtures

Improving available phosphorus in acidic soil using biochar

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