Effect of Zinc Application Methods on Root and Shoot Growth of Transplanted Summer Rice under different Irrigation Regimes in Lateritic Soil of West Bengal

Author: Rahul Kumar Gupta, Ruchi Bharti, Kalipada Pramanik and Sk Naim Aktar

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Abstract

The experiment was carried out during the boro seasons of 2021 and 2022 at the Agricultural Farm of the Institute of Agriculture, Visva-Bharati, Sriniketan, in West Bengal, India. The experimental design was a split-plot with twenty different treatment combinations and was replicated three times. The study included four different irrigation schedules and five different zinc application methods. The main plot consists of irrigation treatments viz., I1- irrigation of 5 cm when water level falls below 5 cm from soil surface in the perforated PVC water tube, I2- irrigation of 5 cm at one day after disappearance of ponded water, I3- irrigation of 5 cm at three days after disappearance of ponded water and I4- irrigation of 5 cm at hair crack stage of the soil. The sub plot comprised of zinc application treatments included: Zn0- control; Zn1- 25 kg ZnSO4, 7H2O ha-1 as soil application; Zn2- 0.5 % ZnSO4, 7H2O as foliar application at 15 and 45 DAT; Zn3- 0.3 % ZnSO4, 7H2O as seed priming; and Zn4- 0.5 % ZnSO4, 7H2O as nursery root dipping. The results showed that the application of irrigation of 5 cm at one day after disappearance of ponded water (I2) and irrigation of 5 cm at three days after disappearance of ponded water (I3) along with application of zinc through 0.3% ZnSO4, 7H2O as seed priming (Zn3) registered higher root and shoot dry weight as well as root shoot ratio. Thus, these treatment combinations may be recommended for higher growth parameters of transplanted summer rice in lateritic soil of West Bengal

Keywords

Irrigation scheduling, root shoot ratio, shoot dry weight, summer rice, zinc

Conclusion

From the above discussions, it is clearly concluded that by applying irrigation of 5 cm at one day after disappearance of ponded water (I2) and irrigation of 5 cm at three days after disappearance of ponded water (I3) along with application of zinc through 0.3% ZnSO4, 7H2O as seed priming (Zn3) recorded higher shoot and root dry weight along with root shoot ratio which in due to better root growth facilitation and hence improving the uptake of water and nutrients. This in turn enhances higher growth parameters which may lead to higher productivity in transplanted summer rice

References

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How to cite this article

Rahul Kumar Gupta, Ruchi Bharti, Kalipada Pramanik and Sk Naim Aktar (2024). Effect of Zinc Application Methods on Root and Shoot Growth of Transplanted Summer Rice under different Irrigation Regimes in Lateritic Soil of West Bengal. Biological Forum – An International Journal, 16(3): 191-197.