Iron toxicity to rice in an acid sulfate soil as influenced by water regimes

Sahrawat, K L (1979) Iron toxicity to rice in an acid sulfate soil as influenced by water regimes. Plant and Soil, 51 (1). pp. 143-144. ISSN 0032-079X

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The effects of two water regimes: Continuous flooding and flooding with soil drying on iron toxicity to rice in an acid sulfate soil was studied by continuously growing 7 crops of IR-32 rice in pots under the two water treatments. There was no plant growth upto the second crop under both water treatments due to iron toxicity. But there was good growth of rice under the continuous water regime from third cropping onwards, however, there was no growth of rice in the flooding with soil drying treatment even upto the seventh crop due to iron toxicity. The results of the study bring out that keeping an acid sulfate soil flooded for a few weeks and then planting rice when iron in soil solution has dropped below toxicity level may be a possible management practice for lowland rice culture on such soils. Drying and reflooding an acid sulfate soil on the other hand aggravates soil acidity and keeps iron in solution in high amounts to be toxic to rice plant.

Item Type: Article
Uncontrolled Keywords: Active iron, Continuous flooding, Iron in solution, Rice growth, Soil drying
Subjects: Others > Soil Science
Depositing User: Mr Sanat Kumar Behera
Date Deposited: 15 Nov 2011 12:50
Last Modified: 23 Jan 2012 08:12
Official URL:
Funders: International Rice Research Institute
Acknowledgement: The work reported in this study was carried out under a Post-doctoral research fellowship at the International Rice Research Institute, Los Bahos, Laguna, Philippines. The author is also grateful to Dr. F. N. Ponnamperuma, Principal Soil Chemist for his valuable suggestions during the course of these investigations.
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