A Study of Physiological Response of Maize under a Short-term Water-logging Condition

Peerasak Chaiprasart1  Makawat  Pasitwilitum1 and Somchai Bunpadap2

 

  1. Naresuan University, Muang, Phitsanulok 65000.
  2. Phitsanulok Field Crops Experiment Station,  Wangthong, Phitsanulok 65130.

 

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A study of physiological response of maize subjected a short-term water- logging condition was conducted in the experimental plot in Phitsanulok Field Crop Experiment Station, Phitsanulok province.  Split plot design in RCB with 3 replications was employed and main plot was two water regimes as conventional irrigation (control) and short-term water-logging.  Water-logging was done by flooding water to the plot at 2 weeks after emergence (DAE) and controlled water level at 5 cm. above ground level for 2 days and then leached off.  Subplot was 20 varieties of maize.  Plot size was 3.0 x 6.0 meter ( 4 rows, 75 x 25 centimeter).  The results founded that the dry weight in control condition after sowing for 5 weeks of stem, leaf, and leaf sheath were not significantly difference among varieties 3.14 – 3.44, 50.25 – 55.00, and 12.56 – 13.75 g. respectively.  In contrast, water-logging condition showed the lower growth rate.  The maximum leaf and stem dry weight were 12.06 and 3.21 g. respectively in C 5019145.  But the maximum dry weight of leaf sheath was 4.63 g. in NK 48.  The minimum dry weight in stem, leaf, and leaf sheath were 0.82, 5.68, and 1.98 g. respectively.  The maximum and minimum height in the same condition was found in PIO 30D55 (45.46 cm) and CP 989 (26.67 cm.) respectively.  Water-logging condition also affected the reproductive characters especially in silking date.  The early and late silking date was found in C 5019145 and CP 989 respectively.  In addition, the anthesis-silking interval (ASI) in water-logging condition was more than in control condition in all varieties.  The result can conclude that CP 989 showed more susceptible than C 5019145, which tolerated to water-logging.

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