CONCENTRATION OF PHOSPHORUS ENVIRONMENTAL THRESHOLD IN SOME CALCAREOUS SOILS OF EAST AZERBAIJAN PROVINCE

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SALMASI RAMIN; FARAHBAKHSH MOHSEN; ASADI HOSSIEN

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Journal: WATERSHED ENGINEERING AND MANAGEMENT Year:2018 | Volume:10 | Issue:3 Page(s): 256-265

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Title

CONCENTRATION OF PHOSPHORUS ENVIRONMENTAL THRESHOLD IN SOME CALCAREOUS SOILS OF EAST AZERBAIJAN PROVINCE

Author(s)

SALMASI RAMIN | FARAHBAKHSH MOHSEN | ASADI HOSSIEN | Issue Writer Certificate

Keywords

DEGREE OF P SATURATIONQ1

EXTRACTION METHODS OF OLSENQ1

MEHLICH-3Q1

SOLTANPOURQ1

FERROUS OXIDEQ1

EUTROPHICATIONQ1

Abstract

There is critical need for a practical indicator to assess the potential of phosphorus (P) movement from a given site to surface waters, either via surface runoff or subsurface drainage. The DEGREE OF P SATURATION (DPS), which relates a measure of P already adsorbed by a soil to its P adsorption capacity, could be a good indicator of that soils P release capacity. For our country soils, there is not any report for DPS calculating. This study aimed to develop techniques of calculating the DPS for calcareous soils of western Azerbayjan, Uremieh Lake sub-watershed, obtaining DPS levels for calcareous soils, and evaluating DPS by use of soluble P as indicator of P runoff potential. For this purpose, 30 surface soil samples with widely P contents were selected and after determining some of general physico-chemical properties, useing of four measures of soil available P and four indices of P sorption capacity, sixteen different forms of DPS were obtained. Significant correlation was obtained between soluble P and different forms of DPS in this study. Threshold P concentration between four extractants, were obtained for Olsen, MEHLICH-3, and SOLTANPOUR ones, except in calculations with Mg as P adsorbed contributor in range of 0.4-33 percent, with 8.14 mean, and for FeO extractant, only in calculations with Ca + Mg as adsorbing one was obtained that was equal to 1.3 percent. DEGREE OF P SATURATION in soils with higher than threshold P concentration values are sustainable to P runoff via surface runoff or leaching, and as a result EUTROPHICATION intensification, and for control this phenomenon should apply management practices with regard to different situations of watershed.

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APA: Copy

SALMASI, RAMIN, FARAHBAKHSH, MOHSEN, & ASADI, HOSSIEN. (2018). CONCENTRATION OF PHOSPHORUS ENVIRONMENTAL THRESHOLD IN SOME CALCAREOUS SOILS OF EAST AZERBAIJAN PROVINCE. WATERSHED ENGINEERING AND MANAGEMENT, 10(3 ), 256-265. SID. https://sid.ir/paper/234699/en

Vancouver: Copy

SALMASI RAMIN, FARAHBAKHSH MOHSEN, ASADI HOSSIEN. CONCENTRATION OF PHOSPHORUS ENVIRONMENTAL THRESHOLD IN SOME CALCAREOUS SOILS OF EAST AZERBAIJAN PROVINCE. WATERSHED ENGINEERING AND MANAGEMENT[Internet]. 2018;10(3 ):256-265. Available from: https://sid.ir/paper/234699/en

IEEE: Copy

RAMIN SALMASI, MOHSEN FARAHBAKHSH, and HOSSIEN ASADI, “CONCENTRATION OF PHOSPHORUS ENVIRONMENTAL THRESHOLD IN SOME CALCAREOUS SOILS OF EAST AZERBAIJAN PROVINCE,” WATERSHED ENGINEERING AND MANAGEMENT, vol. 10, no. 3 , pp. 256–265, 2018, [Online]. Available: https://sid.ir/paper/234699/en

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