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Effects iodine doses on bio fortification of cassava (Manihotesculenta) in Calabar, Southeastern Nigeria

Author Affiliations

  • 1Department of Agricultural Science, Ignatius Ajuru University of Education, Port Harcourt, Nigeria

Res. J. Agriculture & Forestry Sci., Volume 5, Issue (7), Pages 6-11, July,8 (2017)


A 2 by 4 factorial experiment replicated 3 times, arranged in a randomized complete block design was conducted to determine the effectiveness of agronomic iodine biofortification of two varieties of cassava (TME 419 and TMS 30555) using different rates of potassium iodate (0, 2.5, 5.0 and 10kg/ha) in Calabar, southeastern Nigeria. Parameters measured were growth rate (plant height), tuber number, tuber weight and tuber weight per plot. Iodine content in harvested tuberswere also determined. Results indicated that plant height, number of stem, number of leaves, LA and LA1 were not markedly affected by applied iodine (P> 0.05); tuber number, weight and plot yields did not vary significantly with iodine rates. Iodine absorption and retention in tuber flesh and processed product were significant positively correlated with iodine doses (P<0.05 and 0.01). TMS 419 retained iodine better than TMS 30555. Effective dose for agronomic bio-fortification of TME 419 is 2.5 kg/ha KI and10kg/ha KI for TMS 30555.


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