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Y. SHARATH KUMAR REDDY*, V. RAJA RAJESWARI, P. SUDHAKAR,V. RAVINDRA BABU, N.V. NAIDU, K.V. NAGA MADHURI AND V. UMAMAHESH
S.V. Agricultural College, ANGRAU, Tirupati – 517 502
To investigate the effect of zinc application on grain physico chemical characters, the investigation entitled “Effect of Zn Application on Physiological Efficiency, Partitioning and Grain Zinc Fortification in Rice cultivars (Oryza sativa L.)” was conducted in consecutive years during kharif 2013 and 2014 at RC puram farm, (International Crop Research Institute for Semi Arid Tropics (ICRISAT), Patancheru, Hyderabad, Telangana. The experiment was laidout in factorial RBD and replicated thrice with major treatments as four genotypes (Improved Chittimuthyalu (V1), VRB-MS (V2), RP-Bio-226 (V3) and IR-64 (V4)) and sub treatments as six zinc treatments viz. Control (T1), Soil application of ZnSO4 @ 25 Kg ha-1 as basal (T2), Soil application of ZnSO4 @ 25 Kg ha-1 as basal + 0.2% ZnSO4 spray at panicle initiation stage (T3), Soil application of ZnSO4 @ 25 Kg ha-1 as basal + 0.2% ZnSO4 spray at grain filling stage (T4), Soil application of ZnSO4 @ 25 Kg ha-1 as basal + 0.2% ZnSO4 spray at panicle initiation stage+ 0.2% ZnSO4 spray at grain filling stage (T5) and 0.2% ZnSO4 spray at panicle initiation stage+ 0.2% ZnSO4 spray at grain filling stage (T6). The genotype VRB-MS (V2) recorded significantly highest zinc content in brown rice (39.25 ppm, 38.50 ppm) and polished rice (30.67 ppm, 29.60 ppm) followed by RP-Bio-226 (V3) while the lowest values for brown rice and polished rice were recorded with IR-64 (V4) (29.83 ppm, 2.12 ppm) and (19.40, 18.30 ppm). Among the treatmental effects basal application of ZnSO4 @ 25 Kg ha-1 + 0.2% ZnSO4 spray at panicle initiation stage and grain filling stage (T5) recorded highest zinc content in brown rice (37.73 ppm, 37.13 ppm) and polished rice (30.68 ppm, 29.13 ppm) followed by (T6) in both the years.
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