Author(s):

G Tamil Amutham, R Karthikeyan, N Thavaprakaash and C Bharathi

Abstract: A field experiment was conducted at Department of Agronomy Farm, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, to study the effect of agronomic bio-fortification with zinc on growth and yield of babycorn under irrigated condition. The treatments comprised of T₁: No zinc (control), T₂: ZnSO₄ at 25 kg/ha as soil application, T₃: ZnSO₄ at 37.5 kg/ha as soil application, T₄: Foliar spray of ZnSO₄ at 0.5% on 20 and 40 DAS, T₅: Foliar spray of ZnSO₄ at 1.0% on 20 and 40 DAS, T₆: T₂ + T₄, T₇: T₂ + T_5, T₈: T₃ + T_4, T₉: T₃ + T_5. The result of this experiment showed that combined application of zinc sulphate at 37.5 kg/ha with 0.5% foliar spray at 20 and 40 DAS recorded significantly higher plant height (211.6 cm), drymatter production (12758 kg/ha), chlorophyll SPAD value (53.56), took lesser number of days to tasseling (47.88 days) and cob initiation (48.73 days), green cob yield (18637 kg/ha) and green fodder yield (31592 kg/ha) compared to other treatments. However, it was statically on par with combined soil application of zinc sulphate (25 kg/ha or 37.5 kg/ha) with foliar spray (0.5% or 1.0%) at 20 and 40 DAS (T₉, T₇ and T₆).

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