Author(s):

Kamali B, Chandra Sekaran N, Kalaiselvi T and Chitdeshwari T

Abstract: A pot experiment was conducted at Department of Soil Science and Agricultural Chemistry, TNAU, Coimbatore during 2019 with rice var. CO 51 to study the impact of foliar nutrition of FeSO₄ on the enrichment of rice grain iron content and yield. The experiment was a factorial completely randomized design with two factors viz., a) levels of FeSO₄ (Five levels viz., Water spray - control, 0.5% FeSO₄, 0.75% FeSO₄, 1.0% FeSO₄ and 1.5% FeSO₄) along with 0.1 % citric acid and b) Spray at different growth stages of rice (14 stages viz., Panicle initiation, Flowering, Milking, Dough, Panicle initiation + Flowering, Panicle initiation + Milking, Panicle initiation + Dough, Flowering + Milking, Flowering + Dough, Milking + Dough, Panicle initiation + Flowering + Milking, Panicle initiation + Flowering + Milking, Panicle initiation + Milking + Dough, Panicle initiation + Flowering + Milking + Dough). The result revealed that foliar application of ferrous sulphate at various concentrations sprayed at different growth stages caused a significant increase in rice grain and straw yields besides, enrichment of iron in rice grain over control (water spray). The Foliar spray of 1.5 % FeSO₄ + 0.1% CA four times i.e., Panicle initiation + Flowering + Milking + Dough recorded significantly highest grain yield (29.10 g pot^-1), straw yield (41.11 g pot^-1) and grain iron uptake (61.20 µg pot^-1) which is 66, 49 and 190 per cent increase over water spray respectively. However, it was on par with FeSO₄ at 1.0 % along with 0.1% CA sprayed at all the four growth stages.

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