International Journal for Asian Contemporary Research, 2(2): 34-42
Growth and Physiological Responses of Maize to Deficit Irrigation
Received: 13 June, 2022 || Accepted: 20 July, 2022 || Published: 28 July, 2022
A B S T R A C T
A field experiment was conducted at the Agronomy Field Laboratory, Department of Agronomy and Agricultural Extension, University of Rajshahi, from 2 December 2020 to 20 April 2021 to find out the effect of deficit irrigation schedule for maize measured based on panevaporation. The field experiment was set up using a split-plot experimental design including two maize varieties (Syngenta NH-7720 & Ishpahani Diamond) and four irrigation regimes viz. T1 (irrigation based on125% of pan evaporation), T2 (irrigation based on 100% of pan evaporation), T3 (irrigation based on 75% of pan evaporation) and T4 (irrigation based on 50% of pan evaporation). Considering different phyto-physiological responses and yield of maize, it was found that different irrigation regimes differed significantly. In most cases, the highest performance was noted for maximum irrigation treatment (T1), which reduced gradually with the reduction of irrigation amount. The highest grain yield (13.82 t ha-1) was observed in the treatment T1, which was statistically identical to the T2 (12.02 t ha-1). However, grain yield reduced significantly by 25.50% and 32.05% for T3 and T4, respectively, but water use efficiency (WUE) was higher in T4 (2.64 kg ha-1 cm-1) and the lower (2.43 kg ha-1 cm-1) in T3. Although the maize varieties differ significantly, overall performance was good in V2 (Ishpahani Diamond). The highest grain yield (13.897 t ha-1) was obtained from the combination of V2T1, which was more or less similar to the combination of V1T2. Based on my result, it seemed that an irrigation amount equivalent to 100% of pan evaporation could produce nearly the same amount of maize yield with 25 % less irrigational water compared with T1. So, it is suggested that an amount of irrigation equal to 100% of pan evaporation would be the best way to grow maize. This would give a good grain yield and allow less water to be used for irrigation, which is very helpful in the north-western parts of Bangladesh that are affected by drought.
To cite this article: Razzak, A., Bhuiya, R. A., Rai, P., Khan, T. A., Yasmin, N., Alam, A. M.S. and Islam, M. R., (2022). Growth and Physiological Responses of Maize to Deficit Irrigation. International Journal for Asian Contemporary Research, 2 (2): 34-42.
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