Effect of zinc on N, P, K and Zn concentration, uptake and Zn efficiency in rice

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Md. Ibrahim Ali, Q.A. Khaliq, M. A. Azim

            Agronomy Division, Bangladesh Institute of Nuclear Agriculture, Mymensingh, Bangladesh

                 Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University,                                                                                                             Gazipur, Bangladesh

          Biotechnology Division, Bangladesh Sugarcrop Research Institute, Pabna, Bangladesh

An experiment was carried out in Gazipur, Bangladesh to investigate the response of agronomical, physiological, apparent recovery, utilization zinc use efficiency,zinc concentration in endosperm and yield of rice to zinc. The design of experiment wasRandomized Complete Block with three replications included zinc fertilizer level (0, 10 and 20 kg Zn ha-1 as H2O5SZn) and three rice varieties BRRIdhan56, BRRIdhan57 and BRRIdhan62. 10 kg Zn ha-1significantly increased the yield and yield contributing characters in BRRIdhan56 and BRRIdhan57 and 20 kg Zn ha-1 in BRRI dhan 62.The highest Zn content in endosperm (39.85 ppm) was recorded at 20 kg Zn ha-1 in BRRIdhan62 and the lowest (16.27 ppm) at 0 kg Zn ha-1 in BRRIdhan57. The highest agronomic, physiological, apparent recovery and utilization efficiency were recorded at 10 kg Znha-1 and the lowest at 20 kg Znha-1. It was revealed that the rice varieties BRRIdhan56, BRRIdhan57 responded to the application of 10 kg Zn ha-1, while BRRIdhan62 to 20 kg Znha-1. So, to obtain the highest yield to ensure satisfactory zinc content in BRRIdhan56, BRRIdhan57 with the most zinc use efficiency and avoid of environmental pollutions, use of 10 kg Znha-1 while 20 kg Zn ha-1 toBRRIdhan62.

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