Availability of zinc in the rhizosphere of corn in two contaminated soils with different texture treated with chelators

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RAHMANIAN M.; HOSSEINPOUR A.R.

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Journal: Journal of Water and Soil Conservation Year:2018 | Volume:25 | Issue:2 Page(s): 187-202

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Title

Availability of zinc in the rhizosphere of corn in two contaminated soils with different texture treated with chelators

Author(s)

RAHMANIAN M. | HOSSEINPOUR A.R. | Issue Writer Certificate

Keywords

ChelatorQ1

AvailabilityQ1

RhizosphereQ2

Sandy loam soilQ2

Clay loam soilQ2

Abstract

Background and Objectives: Rhizosphere processes have a major impact on zinc (Zn) Availability in soils. The chemical and biological characteristics of the Rhizosphere soils can be very different from those of the bulk soils. In the peresent study, the effects of EDTA, citric acid and poultry manure extract (PME) were investigated on Availability of Zn in the Rhizosphere of corn (hybrid (KSC. 704)) in two contaminated soils with different texturs. Materials and Methods: This research was done as factoriel in a completely randomized design with three replications in greenhouse condition and citric acid and EDTA were used at concentrations level 0, 0. 5 and 1 mmol kg-1 soil and poultry manure extract at concentrations level 0, 0. 5 and 1 g kg-1 soil to rhizoboxes. Three seeds of corn were plant in the rhizobox and after 10 weeks, plants were harvested and Rhizosphere and bulk soils were separated. pH, dissolved organic carbon (DOC), microbial biomass carbon (MBC) and available Zn were determined in the Rhizosphere and bulk soils by using four chemical procedures including DTPA-TEA, AB-DTPA, Mehlich3 and Rhizosphere-based methods. Results: In both soils, the results indicated that DOC and MBC in the Rhizosphere were significantly (P<0. 05) increased, while, pH in the Rhizosphere was significantly (P<0. 05) decreased compared to bulk soils. In both soils, Zn extracted by different methods in the Rhizosphere were significantly (P<0. 05) lower than those in the bulk soils. The amount of exteracted Zn with extractants ranged from 9. 00 to 75. 00 mg kg-1 in Sandy loam soil and 0. 78 to 75. 00 mg kg-1 in Clay loam soil. The maximum amount of Zn was exteracted by mehlich3 and the least amount of Zn exteracted by Rhizosphere based method. The available Zn increased a long with addition of Chelators to soil. Conclusion: The results of this study showed that in Sandy loam soil, the maximum amount of Zn was obtained in the citric acid treatment (1 mmol kg-1) and the least amount in control condition, while, in Clay loam soil, the maximum amount of Zn was noticed in the EDTA treatment (1 mmol kg-1) and the least amount in the PME treatment (1 g kg-1). The mean of Zn extracted by DTPA-TEA, AB-DTPA, Mehlich3, in Clay loam soil was significantly (P<0. 05) higher than those in Sandy loam soil. The mean of Zn extracted by Rhizosphere-based method in Sandy loam soil was significantly (P<0. 05) lower than those in Clay loam soil.

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APA: Copy

RAHMANIAN, M., & HOSSEINPOUR, A.R.. (2018). Availability of zinc in the rhizosphere of corn in two contaminated soils with different texture treated with chelators. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), 25(2 ), 187-202. SID. https://sid.ir/paper/156346/en

Vancouver: Copy

RAHMANIAN M., HOSSEINPOUR A.R.. Availability of zinc in the rhizosphere of corn in two contaminated soils with different texture treated with chelators. JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES)[Internet]. 2018;25(2 ):187-202. Available from: https://sid.ir/paper/156346/en

IEEE: Copy

M. RAHMANIAN, and A.R. HOSSEINPOUR, “Availability of zinc in the rhizosphere of corn in two contaminated soils with different texture treated with chelators,” JOURNAL OF WATER AND SOIL CONSERVATION (JOURNAL OF AGRICULTURAL SCIENCES AND NATURAL RESOURCES), vol. 25, no. 2 , pp. 187–202, 2018, [Online]. Available: https://sid.ir/paper/156346/en

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