The fate and transformations of zinc added to soils
A new sequential extraction procedure to remove specifically adsorbed forms of trace metals and easily reducible manganese (Mn) oxide fractions was used to study the fate and transformations of zinc (Zn) added to soils. Most of the endogenous Zn in field soils (75–87%) was found to exist in a residu...
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| Veröffentlicht in: | Australian journal of soil research 1997, Vol.35 (4), p.727-738 |
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| description | A new sequential extraction procedure to remove specifically adsorbed forms of trace metals and easily reducible manganese (Mn) oxide fractions was used to study the fate and transformations of zinc (Zn) added to soils. Most of the endogenous Zn in field soils (75–87%) was found to exist in a residual fraction which is considered to be silicates, while the Zn added as a fertiliser in the field soils was found predominantly in an EDTA-extractable fraction and in association with iron (aluminium) [Fe (Al)] and Mn oxides. The Zn recently added to soils was found to be more in the reactive forms (water-soluble plus exchangeable and EDTA-extractable Zn) than the Zn added to field soils in association with long-term Zn application. With time, the EDTA-extractable Zn transformed into the unreactive forms (Zn associated with Fe (Al) and Mn oxides). The processes could be described by a diffusion equation. The apparent diffusion rate coefficients were found to be in the order of 10 –10 –10 –11 /s. The diffusion activation energy ( E a ) was found to be 67 kJ/mol. The diffusion of Zn cations into microporous solids is probably a rate-limiting process. The transformation of reactive Zn into unreactive Zn was enhanced by elevated temperatures and by drying and rewetting. The drying and rewetting effect at relatively high temperature may be important in the processes which lead to decreases in the availability of Zn to plants. Keywords: micronutrients, heavy metals, fractionation, micropore diffusion. Australian Journal of Soil Research 35(4) 727 - 738 Full text doi:10.1071/S96102 © CSIRO 1997 |
| doi_str_mv | 10.1071/S96102 |
| format | Article |
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B ; UREN, N. C</creator><creatorcontrib>MA, Y. B ; UREN, N. C</creatorcontrib><description>A new sequential extraction procedure to remove specifically adsorbed forms of trace metals and easily reducible manganese (Mn) oxide fractions was used to study the fate and transformations of zinc (Zn) added to soils. Most of the endogenous Zn in field soils (75–87%) was found to exist in a residual fraction which is considered to be silicates, while the Zn added as a fertiliser in the field soils was found predominantly in an EDTA-extractable fraction and in association with iron (aluminium) [Fe (Al)] and Mn oxides. The Zn recently added to soils was found to be more in the reactive forms (water-soluble plus exchangeable and EDTA-extractable Zn) than the Zn added to field soils in association with long-term Zn application. With time, the EDTA-extractable Zn transformed into the unreactive forms (Zn associated with Fe (Al) and Mn oxides). The processes could be described by a diffusion equation. The apparent diffusion rate coefficients were found to be in the order of 10 –10 –10 –11 /s. The diffusion activation energy ( E a ) was found to be 67 kJ/mol. The diffusion of Zn cations into microporous solids is probably a rate-limiting process. The transformation of reactive Zn into unreactive Zn was enhanced by elevated temperatures and by drying and rewetting. The drying and rewetting effect at relatively high temperature may be important in the processes which lead to decreases in the availability of Zn to plants. Keywords: micronutrients, heavy metals, fractionation, micropore diffusion. 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Ionic and exchange properties ; Physics, chemistry, biochemistry and biology of agricultural and forest soils ; Soil and rock geochemistry ; Soil science ; Soil-plant relationships. Soil fertility. Fertilization. Amendments</subject><ispartof>Australian journal of soil research, 1997, Vol.35 (4), p.727-738</ispartof><rights>1997 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c333t-d852c9df3f90e88b513e6a72ef51dea7b1745bf356d92254afec56be636971d23</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,3337,3338,4010,27846,27900,27901,27902</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=2829879$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>MA, Y. B</creatorcontrib><creatorcontrib>UREN, N. C</creatorcontrib><title>The fate and transformations of zinc added to soils</title><title>Australian journal of soil research</title><description>A new sequential extraction procedure to remove specifically adsorbed forms of trace metals and easily reducible manganese (Mn) oxide fractions was used to study the fate and transformations of zinc (Zn) added to soils. Most of the endogenous Zn in field soils (75–87%) was found to exist in a residual fraction which is considered to be silicates, while the Zn added as a fertiliser in the field soils was found predominantly in an EDTA-extractable fraction and in association with iron (aluminium) [Fe (Al)] and Mn oxides. The Zn recently added to soils was found to be more in the reactive forms (water-soluble plus exchangeable and EDTA-extractable Zn) than the Zn added to field soils in association with long-term Zn application. With time, the EDTA-extractable Zn transformed into the unreactive forms (Zn associated with Fe (Al) and Mn oxides). The processes could be described by a diffusion equation. The apparent diffusion rate coefficients were found to be in the order of 10 –10 –10 –11 /s. The diffusion activation energy ( E a ) was found to be 67 kJ/mol. The diffusion of Zn cations into microporous solids is probably a rate-limiting process. The transformation of reactive Zn into unreactive Zn was enhanced by elevated temperatures and by drying and rewetting. The drying and rewetting effect at relatively high temperature may be important in the processes which lead to decreases in the availability of Zn to plants. Keywords: micronutrients, heavy metals, fractionation, micropore diffusion. Australian Journal of Soil Research 35(4) 727 - 738 Full text doi:10.1071/S96102 © CSIRO 1997</description><subject>Agronomy. Soil science and plant productions</subject><subject>Biological and medical sciences</subject><subject>Chemical, physicochemical, biochemical and biological properties</subject><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>General agronomy. Plant production</subject><subject>Geochemistry</subject><subject>Micronutrients fertilization</subject><subject>Mineral components. Ionic and exchange properties</subject><subject>Physics, chemistry, biochemistry and biology of agricultural and forest soils</subject><subject>Soil and rock geochemistry</subject><subject>Soil science</subject><subject>Soil-plant relationships. Soil fertility. Fertilization. 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B</au><au>UREN, N. C</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The fate and transformations of zinc added to soils</atitle><jtitle>Australian journal of soil research</jtitle><date>1997</date><risdate>1997</risdate><volume>35</volume><issue>4</issue><spage>727</spage><epage>738</epage><pages>727-738</pages><issn>0004-9573</issn><issn>1838-675X</issn><eissn>1446-568X</eissn><coden>ASORAB</coden><abstract>A new sequential extraction procedure to remove specifically adsorbed forms of trace metals and easily reducible manganese (Mn) oxide fractions was used to study the fate and transformations of zinc (Zn) added to soils. Most of the endogenous Zn in field soils (75–87%) was found to exist in a residual fraction which is considered to be silicates, while the Zn added as a fertiliser in the field soils was found predominantly in an EDTA-extractable fraction and in association with iron (aluminium) [Fe (Al)] and Mn oxides. The Zn recently added to soils was found to be more in the reactive forms (water-soluble plus exchangeable and EDTA-extractable Zn) than the Zn added to field soils in association with long-term Zn application. With time, the EDTA-extractable Zn transformed into the unreactive forms (Zn associated with Fe (Al) and Mn oxides). The processes could be described by a diffusion equation. The apparent diffusion rate coefficients were found to be in the order of 10 –10 –10 –11 /s. The diffusion activation energy ( E a ) was found to be 67 kJ/mol. The diffusion of Zn cations into microporous solids is probably a rate-limiting process. The transformation of reactive Zn into unreactive Zn was enhanced by elevated temperatures and by drying and rewetting. The drying and rewetting effect at relatively high temperature may be important in the processes which lead to decreases in the availability of Zn to plants. Keywords: micronutrients, heavy metals, fractionation, micropore diffusion. 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| identifier | ISSN: 0004-9573 |
| ispartof | Australian journal of soil research, 1997, Vol.35 (4), p.727-738 |
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| source | CSIRO Publishing Journals; Periodicals Index Online |
| subjects | Agronomy. Soil science and plant productions Biological and medical sciences Chemical, physicochemical, biochemical and biological properties Earth sciences Earth, ocean, space Exact sciences and technology Fundamental and applied biological sciences. Psychology General agronomy. Plant production Geochemistry Micronutrients fertilization Mineral components. Ionic and exchange properties Physics, chemistry, biochemistry and biology of agricultural and forest soils Soil and rock geochemistry Soil science Soil-plant relationships. Soil fertility. Fertilization. Amendments |
| title | The fate and transformations of zinc added to soils |
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