The effect of orthophosphate‚ nitrate and chloride anions on desorption and availability of adsorbed zinc in some calcareous soils

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Kiani Harchegani S.Z.; HOSSEINPUR A.R.; MOTAGHIAN H.R.

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Journal: Journal of Water and Soil Conservation Year:2020 | Volume:26 | Issue:6 Page(s): 231-246

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Title

The effect of orthophosphate‚ nitrate and chloride anions on desorption and availability of adsorbed zinc in some calcareous soils

Author(s)

Kiani Harchegani S.Z. | HOSSEINPUR A.R. | MOTAGHIAN H.R. | Issue Writer Certificate

Keywords

Nonspecific adsorptionQ1

OrthophosphateQ1

AvailabilityQ2

ZincQ1

Abstract

Background and Objectives: Nowadays, the use of Zinc (Zn) fertilizers has been expanded to alleviate the deficiency of this element and improve the yield and quality of agricultural products. The knowledge about the Availability and release of adsorbed Zn after application in soil is necessary to achieve the best fertilization management and soil and water conservation against Zn accumulation in soil. On the other hand, presence of anions in irrigation water, agricultural fertilizers and sewage sludge can affect adsorption, desorption and Availability of nutrients such as Zn. Zinc adsorption characteristics was usually studied using isotherm coefficients; while Availability of adsorbed Zn in soil is important in soil fertility. In this study, the effects of Orthophosphate, nitrate and chloride anions on adsorption and desorption capacity were investigated in five calcareous soil of Chaharmahal-Va-Bakhtiari province. Materials and Methods: In this study, a solution containing concentrations of 25, 50, 75, 100, 150 and 200 mg l-1 of Zn as ZnSO4 source in the presence of KH2PO4, KNO3 and KCl electrolytes (50 mM) was used. After Zn adsorption in soils, Availability and desorbed of Zn was measured by DTPA-TEA and 0. 01 M CaCl2, respectively. The amount of Zn desorbed in 0. 01M CaCl2 is adsorbed Zn as non-specific. The adsorbed Zn as specific was calculated from the difference between the amounts of adsorbed Zn and desorbed Zn by 0. 01 M CaCl2. Results: According to the results, the highest amount of Zn adsorbed in the presence of all three anions was specific. Percentages of adsorbed Zn in all soils in the presence of nitrate anion were more than two other anions (P<0. 05) and ranged from 99. 65 to 99. 80 in the chloride solution (more than other anions P<0. 05), 99. 84 to 99. 99 in the nitrate solution and 99. 55 to 99. 72 in the Orthophosphate solution. Availability of adsorbed Zn ranged from 41 to 43% in Orthophosphate solution, 49 to 54% in nitrate solution and 58 to 61% in chloride solution. Conclusion: The result showed that highest amount of available adsorbed Zn was extracted in the presence of chloride, nitrate and Orthophosphate (P<0. 05). About 50% of the Zn adsorbed extracted by DTPA-TEA. In the presence of all studied anions, more than 99% Zn adsorbed as specific. Therefore, Zinc at specific adsorption sites and 0. 01 M CaCl2 were not able to release this element. The results of this study showed the application of P and Zn as fertilizers in calcareous soils can lead to a reduction in extracted Zn by DTPA-TEA in treated soils with these nutrients.

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APA: Copy

Kiani Harchegani, S.Z., HOSSEINPUR, A.R., & MOTAGHIAN, H.R.. (2020). The effect of orthophosphate‚ nitrate and chloride anions on desorption and availability of adsorbed zinc in some calcareous soils. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), 26(6 ), 231-246. SID. https://sid.ir/paper/389879/en

Vancouver: Copy

Kiani Harchegani S.Z., HOSSEINPUR A.R., MOTAGHIAN H.R.. The effect of orthophosphate‚ nitrate and chloride anions on desorption and availability of adsorbed zinc in some calcareous soils. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES)[Internet]. 2020;26(6 ):231-246. Available from: https://sid.ir/paper/389879/en

IEEE: Copy

S.Z. Kiani Harchegani, A.R. HOSSEINPUR, and H.R. MOTAGHIAN, “The effect of orthophosphate‚ nitrate and chloride anions on desorption and availability of adsorbed zinc in some calcareous soils,” JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), vol. 26, no. 6 , pp. 231–246, 2020, [Online]. Available: https://sid.ir/paper/389879/en

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