Iron Uptake in Rice as Influenced by Genotypic Variation and Fertilizer Application

The iron uptake of seven dwarf and ten tall varieties of rice as affected by increasing use of N and P fertilizers was studied. It was found that the concentration of Fe in straw was almost double of that found in grain of both the types of rice varieties, while straw/grain ratio of dwarf and tall varieties was 0.96 and 1.39, respectively. In partial regression analysis Fe uptake by grain showed significant impact on grain yield while that by straw did not. Dwarf varieties required 53 g Fe/q of grain production as against 62 g/q by tall varieties. Concentration and uptake of Fe in straw and grain were found to be appreciably increasing with increasing fertility status of soil but its percentage distribution showed increasing trend in straw and declining trend in grain.