Effects of waterlogging on growth and yield components of a Tainan 9 peanut plant
2001
Kitti Wongpichet
Waterlogging may affect peanut production in some areas of Thailand. This experiment studied the response of "Tainan 9" peanut to waterlogging, with the objectives to find out the critical growth stage (s) to waterlogging and the impact of waterlogging in terms of growth and seed yield components. The peanuts were planted in vessels, one plant per bowl. Trial 1 studied the effect of waterlogging throughout from growth stages V3 (three nodes), V5 (five nodes), R1 (first bloom), R3 (first peg turns to pod) and control (no waterlogging). Trial 2 introduced waterlogging from growth stage R3 until harvest as follows; waterlogging throughout (T1), waterlogging alternated with dryness (T2), waterlogging only at growth stages R3 and R6 (fully expanded seed; T3), waterlogging at only growth stage R3 (T4), and control (T5). The results showed that, in trial 1, peanuts at early growth stages (V3 and V5) were more sensitive to waterlogging throughout than that at later growth stages (R1 and R3). Waterlogging retarded growth and development of peanut plants. Waterlogging started at growth stage R3 in trial 2 reduced the efficiency of yield production significantly (P0.05) by reducing total plant weight and productive pod weight compared to control. However, the number of pegs and pods tended to increase with waterlogging from growth stage R3. Waterlogging reduced seed yield components especially the number of productive pods per plant.
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