Effects of Phosphorus Fertilization on Hybrid Varieties of mungbean [Vigna radiata (L.) Wilczek] in a Salinity Prone Area of the Subtropics

A field experiment was conducted comprising two varieties of mungbean, BARI Mung-5 (V1) and BARI Mung-6 (V2), and five levels of phosphorus fertilizer: triple super phosphate [Ca(H2PO4)] viz. T1 (control), T2 (42.5 kg P ha−1), T3 (85 kg P ha−1), T4 (127.5 kg P ha−1), and T5 (170 kg P ha−1). The experiment was organized in a randomized complete block design with three replications. V1 produced the highest number of pods per plant (7.65), whereas the maximum 1,000-seed weight (49 g) was produced by V2. The maximum plant height (30.89 cm), number of branches per plant (8.55), number of leaves per plant (19.05), number of pods per plant (10.25), pod length (8.95 cm), number of seeds per pod (9.11), 1,000-seed weight (48.17 g), and yield (1.05 t ha−1) were obtained from the T4 treatment. The interaction of phosphorus levels and varieties had a considerable effect on the growth, yield, and yield attributes of mungbean. The highest number of leaves (20.44) and number of pods (10.39) were obtained from V1 when 127.5 kg P ha−1 (T4) was applied, whereas the maximum number of seeds per pod (9.25) and maximum pod length (9.09 cm) were obtained when 85 kg P ha−1 and 42.5 kg P ha−1, respectively, were used. The highest number of branches per plant (8.87), 1,000-seed weight (52.83 g), and the maximum seed yield (1.14 t ha−1) were achieved from the treatment V2T4 owing to the interactive effect of phosphorus dose and mungbean variety.