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Transformation of zinc and iron in submerged rice soils of Kashmir

Indian Agricultural Research Journals

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Title Transformation of zinc and iron in submerged rice soils of Kashmir
 
Creator WANI, MUSHTAQ A
BHAT, M A
KIRMANI, N A
NAZIR, SHAISTA
 
Subject Rice, Soils, Submergence, Transformation, Zinc fractions
 
Description Thirty five alluvial rice (Oryza sativa L.) growing soils of Kashmir (India) were studied for transformation and distribution of different forms of Zn and Fe on submergence out of forty soils. The results revealed that more than 83% of total Zn occurred in the relatively inactive clay lattice-bound form while a smaller fraction, viz. 1.09, 1.82, 11.70 and 2.27% of the total zinc occurred as water-soluble plus exchangeable, organic complexed, amorphous sesquioxide-bound and crystalline sesquioxide bound forms, respectively. All these four Zn forms showed significant negative correlations with soil pH (r = –0.637**, –0.419*, –0.539** and –0.528**, respectively), while the latter two Zn forms showed significant positive correlations with Fe2O3(r = 0.510** and 0.540**)and A12O3 (r = 0.698** and 0.536**) content of the soils. The different Zn forms were found to have positive and significant correlations amongst each other, suggesting the existence of a dynamic equilibrium of these forms in soil. There was a marked increase in NH4OAc and AlCl3 extractable Fe with concomitant decrease in CBD-Fe. Much of Fe3+ in crystalline sesquioxides underwent dissolution due to reduction to Fe2+.
 
Publisher The Indian Journal of Agricultural Sciences
 
Contributor —
 
Date 2013-11-07
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Peer-reviewed Article
 
Format application/pdf
 
Identifier http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/34550
 
Source The Indian Journal of Agricultural Sciences; Vol 83, No 11 (2013)
0019-5022
 
Language eng
 
Relation http://epubs.icar.org.in/ejournal/index.php/IJAgS/article/view/34550/15303
 
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