EFFECT OF TOXIC IRON CONCENTRATIONS ON THE GROWTH OF LOWLANDS RICE

Iron (Fe) toxicity is a complex and major nutritional soil constraint affecting rice production in the irrigated and rainfed lowland soils in various parts of the World, including West Africa and Nigeria in particular. Data related to the reaction of rice cultivars especially ITA 212 and Suakoko 8 i...

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Bibliographic Details
Published inJournal of plant nutrition Vol. 24; no. 3; pp. 441 - 457
Main Authors Olaleye, A. O., Tabi, F. O., Ogunkunle, A. O., Singh, B. N., Sahrawat, K. L.
Format Journal Article
LanguageEnglish
Published Taylor & Francis Group 28.02.2001
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Summary:Iron (Fe) toxicity is a complex and major nutritional soil constraint affecting rice production in the irrigated and rainfed lowland soils in various parts of the World, including West Africa and Nigeria in particular. Data related to the reaction of rice cultivars especially ITA 212 and Suakoko 8 in the West Africa sub-region to Fe concentrations is sparse. A pot experiment was conducted involving these two rice cultivars, two soil types with previous history of Fe-toxicity and four Fe 2+ levels (control, 1000, 3000, and 4000-mg Fe 2+ L −1 ). The experiment was a factorial design with the treatments arranged in a completely randomized fashion with three replications. The effects of various Fe-levels were measured on bronzing symptoms, tissue nutrient contents, plant height, tiller numbers/pot, at 30, 60, and 90 days after transplanting (DAT) while grain and dry matter yields were measured at harvest. The results clearly showed that with increasing Fe 2+ levels, tissue phosphorus (P), potassium (K), and manganese (Mn) contents decrease with age and with increasing Fe 2+ levels while calcium (Ca), magnesium (Mg), and Fe contents increase. Increasing Fe 2+ levels was also observed to reduce dry matter yields, tiller numbers/pot and plant height significantly (P≤0.05).
ISSN:0190-4167
1532-4087
DOI:10.1081/PLN-100104971