Effects of waterlongging on growth and yield of mungbeans
1996
Mekanavakul, M. | Laosuwan, P. (Prince of Songkla Univ., Songkhla (Thailand). Faculty of Science. Dept. of Biology)
Experiment was conducted to evaluate the effects of waterlogging on growth and yield of mungbean (Vigna radiata (L.) Wilczek, V. mungo (L.) Hepper). A split-plot design was used in this experiment. Mungbean varieties: U-thong 1, U-thong 2, KPS 1 and line PSU 424-61 were used as the main plots and the duration of waterlogging 3, 6, 9, 12, 15 and 18 days were used as sub-plots. The results of the experiment showed that the vegetative growth including plant height, length of tap-root, plant dry weight and number of nodules of four mungbeans were adversely affected by duration of waterlogging. The development of mungbean at the 1-2 leaf stage exposed to waterlogging for 0-3 days was not significantly differnt from the control in U-thong 1 and U-thong 2 and highly significant in KPS 1 and PSU 424-61. The growth rate and nodulation of mungbean were lowest upon exposure to 6-9 days of waterlogging. This was due to the damage and death of the primary root system. However the growth and development of mungbean seemed to improve during 12-18 days of waterlogging due to the development of adventitious roots. U-thong 2 was least affected by waterlogging due to the extensive development of adventitious root system. Mungbean variety KPS 1 was most affected by waterlogging followed by PSU 424-61 and U-thong 1 respectively. The ability of mungbean to recover from deletorious effects decreased at the increase of duration of exposure to waterlogging. U-thong 2 gave higher regrowth and yield than U-thong 1, PSU 424-61 and KPS 1. Waterlogging affect all characters including plant height, leaf area, dry weight, seed number, pod number, pod weight and seed weight. However, seed size of all entries were quite stable.
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