Study of Iron Toxicity in Rice Under Varied Concentrations of Iron Solution
Journal Title: International Journal of Agricultural Science and Research (IJASR) - Year 2019, Vol 9, Issue 3
Abstract
Irontoxicity is a wide spread nutrient disorder in the rice especially underrice-rice cropping system. The toxicity of iron is associated with reduced soil aeration due to submergence or flooded soils. It is caused by the high concentration of iron as Fe2+ in soil and it causes brown mottling symptom on leaves which spread downwards from the tip of the older leaves followed by the drying of entire leaves. An incubation experiment was conducted at Rice research station, Ambasamudram during Kar, 2018 to assess intensity of toxicity at different concentration of the ironic solution (0, 5, 10, 25, 50, 100, 250, 500 mg L-1) on four popularrice cultivars viz., ASD 16, ADT 45, ADT 39, TPS 5. The intensity of toxicity produced by various iron concentration levels were measured between active tillering and panicle initiation stage of the crop by following standard visual bronzing score developed by IRRI. The biometric characters such as plant height, specific leaf area (SLA), No. Of tillers/hill at 30th, 60thdayaftertransplantingwererecorded. The iron toxic symptom of bronzing was observed more under ASD 16 followed by ADT 45, ADT 39 and TPS 5. As the concentration of iron increases the plant height, specific leaf area and No. Of tillers/hill and biomass production were decreased. However, a rice grown at the iron concentration at 250 and 500 mg L-1 greatly reduced the growth and yield attributes viz tiller count, biomass production and Specific leaf area during 30th and 60thdaysaftertransplanting.
Authors and Affiliations
Mythili T, Jothimani S
Keywords
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- EP ID EP601272
- DOI 10.24247/ijasrjun201925
- Views 98
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