HEATING EFFECT ON INORGANIC PHOSPHORUS FRACTIONS AND SORPTION OF HIGHLY CALCAREOUS SOILS

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ADHAMI E.; OWLIAIE H.R.; MOLAVI R.

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Journal: Journal of Soil Management and Sustainable Production Year:2013 | Volume:3 | Issue:2 Page(s): 95-114

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Title

HEATING EFFECT ON INORGANIC PHOSPHORUS FRACTIONS AND SORPTION OF HIGHLY CALCAREOUS SOILS

Author(s)

ADHAMI E. | OWLIAIE H.R. | MOLAVI R. | Issue Writer Certificate

Keywords

CALCAREOUS SOILSQ2

FIREQ2

NAHCO3-PQ2

PEDOGENIC CA-PQ2

ADSORPTION ISOTHERMSQ2

Abstract

The objectives of the present study were to evaluate the effect of heating on various inorganic phosphorus (P) fractions and sorption characteristics of highly CALCAREOUS SOILS of Kohgyloyeh and Boier-Ahmad province. Treatments were consisted of 5 soils and 4 heating treatment (untreated, 200, 350 and 550oC) for two hour. P fractionation included successive extraction with NaHCO3 (NaHCO3-P); PEDOGENIC CA-P (NH4OAc-P+MgCl2-P); NH4F (NH4F-P); NaOHNa2CO3 (HC-P), citrate-dithionite-bicarbonate (CBD-P), and H2SO4 (H2SO4-P) carried on 1 g sample in duplicate. P sorption was studied by equilibrating 2 g of samples with 20 ml solution containing 5 to 400 mg P kg-1 soil with 0.01 M KCl as background solution in duplicate. Results indicated that generally high temperatures (350 and 550o C) significantly increased NaHCO3-P, PEDOGENIC CA-P and NH4F-P. H2SO4-P significantly decreased in 350oC but significantly increased by 550oC heating. These changes indicate the transformation of inorganic P fractions to each other in studied temperatures in addition to transformation of organic P to inorganic P. Quantity of P sorption in the unity of P concentration (KF) decreased by 550oC in soils with lower CCE and higher Fe oxides, while it increased in soils with higher CCE and lower Fe oxides content. This effect is probably due to the transformation of crystalline Fe oxides to forms with lower specific surface area, which regualte P retention in the low concentration of P.

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APA: Copy

ADHAMI, E., OWLIAIE, H.R., & MOLAVI, R.. (2013). HEATING EFFECT ON INORGANIC PHOSPHORUS FRACTIONS AND SORPTION OF HIGHLY CALCAREOUS SOILS. ELECTRONIC JOURNAL OF SOIL MANAGEMENT AND SUSTAINABLE PRODUCTION, 3(2), 95-114. SID. https://sid.ir/paper/209783/en

Vancouver: Copy

ADHAMI E., OWLIAIE H.R., MOLAVI R.. HEATING EFFECT ON INORGANIC PHOSPHORUS FRACTIONS AND SORPTION OF HIGHLY CALCAREOUS SOILS. ELECTRONIC JOURNAL OF SOIL MANAGEMENT AND SUSTAINABLE PRODUCTION[Internet]. 2013;3(2):95-114. Available from: https://sid.ir/paper/209783/en

IEEE: Copy

E. ADHAMI, H.R. OWLIAIE, and R. MOLAVI, “HEATING EFFECT ON INORGANIC PHOSPHORUS FRACTIONS AND SORPTION OF HIGHLY CALCAREOUS SOILS,” ELECTRONIC JOURNAL OF SOIL MANAGEMENT AND SUSTAINABLE PRODUCTION, vol. 3, no. 2, pp. 95–114, 2013, [Online]. Available: https://sid.ir/paper/209783/en

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