INDIGENOUS MAKING OF DGT TECHNIQUES IN IRAN AND THEIR APPLICATION IN THE MEASUREMENT OF PHOSPHORUS CONTENT IN SOIL AND WATER

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REYHANITABAR ADEL; HIDARI SABER; OLAD ALI

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Journal: Iranian Journal of Soil and Water Research Year:2015 | Volume:46 | Issue:1 Page(s): 151-161

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Title

INDIGENOUS MAKING OF DGT TECHNIQUES IN IRAN AND THEIR APPLICATION IN THE MEASUREMENT OF PHOSPHORUS CONTENT IN SOIL AND WATER

Author(s)

REYHANITABAR ADEL | HIDARI SABER | OLAD ALI | Issue Writer Certificate

Keywords

ACRYLAMIDEQ2

ALYL AGAROSEQ2

DGTQ2

PHOSPHOROUSQ2

SOILQ2

Abstract

Next to nitrogen, among the crop essential nutrients, phosphorus is the most important limiting factor as far as yield in agricultural production is concerned, throughout the world. There are different methods of assessing phosphorus status in SOIL and in solutions. One of the new techniques in this regard is the techniques of Diffusive Gradient in Thin films (DGT). This method is based upon ion transport in a diffusion layer and its absorption by a resin layer. In manufacturing the gels in DGT, the material used is among the monopolies and patented ones. Throughout the present study, ACRYLAMIDE – ALYL AGAROSE gel was used as the diffusion layer and ferryhydrite in ACRYLAMIDE - ALYL AGAROSE gel as the resin layer in DGT assembly. The effect of diffusion coefficient in diffusive gel, diffusive gel reactivity, and phosphorus desorption kinetics from resin gel, phosphorus recovery efficiency from the resin gel as well as DGT performance in SOIL and water were then examined. The results revealed that the diffusion coefficient of phosphorus ions in the gel with a 0.3% of ALYL AGAROSE at 25 °C was 8.2´10-6 cm2/s, decreasing with increased ALYL AGAROSE concentrations. PHOSPHOROUS recovery efficiency from resin gel measured by use of 10 ml H2SO4 0.15 M was almost 100 percent. The assessed P, using DGT, revealed a strong linear correlation (r=0.98**) with the actual phosphorus concentration in the examined solution. Throughout the study, an excellent correlation (r=0.99**) was observed between P measured through DGT and the available P detected through the traditional Olsen method. This was observed in three types of calcareous SOILs, implying that DGT could be a suitable alternative for a rapid available P determination in calcareous SOILs.

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APA: Copy

REYHANITABAR, ADEL, HIDARI, SABER, & OLAD, ALI. (2015). INDIGENOUS MAKING OF DGT TECHNIQUES IN IRAN AND THEIR APPLICATION IN THE MEASUREMENT OF PHOSPHORUS CONTENT IN SOIL AND WATER. IRANIAN JOURNAL OF SOIL AND WATER RESEARCH, 46(1), 151-161. SID. https://sid.ir/paper/225798/en

Vancouver: Copy

REYHANITABAR ADEL, HIDARI SABER, OLAD ALI. INDIGENOUS MAKING OF DGT TECHNIQUES IN IRAN AND THEIR APPLICATION IN THE MEASUREMENT OF PHOSPHORUS CONTENT IN SOIL AND WATER. IRANIAN JOURNAL OF SOIL AND WATER RESEARCH[Internet]. 2015;46(1):151-161. Available from: https://sid.ir/paper/225798/en

IEEE: Copy

ADEL REYHANITABAR, SABER HIDARI, and ALI OLAD, “INDIGENOUS MAKING OF DGT TECHNIQUES IN IRAN AND THEIR APPLICATION IN THE MEASUREMENT OF PHOSPHORUS CONTENT IN SOIL AND WATER,” IRANIAN JOURNAL OF SOIL AND WATER RESEARCH, vol. 46, no. 1, pp. 151–161, 2015, [Online]. Available: https://sid.ir/paper/225798/en

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