Development of simple technique for predicting seed vigour in groundnut
1989
Wasana Phalarak (Khon Kaen Univ., Khon Kaen (Thailand). Faculty of Agriculture. Dept. of Plant Science)
Three modified accelerated aging conditions were compared with the standard condition as described by Dolouche and Baskin (1973). The modified conditions involved changing the temperature and aging time while keeping the relative humidity at 100 %, the same level as the standard procedure. The modified conditions included (1) sun drying of the seeds for 2 days, 8 hours a day, (2) keeping the seeds at room temperature (22-28 deg. celsius) for 96 hour and (3) keeping the seeds at room temperature for 168 hours. In the control treatment (procedure of Delouche and Baskin, 1973) the seeds were kept at 42 deg. celsius for 96 hours. Groundnut pods were collected from drying floors and further sun-dried for 2-3 days until the moisture content dropped to about 7 %. The four accelerated aging conditions were applied to these seed lots. Preliminary results showed that sun drying for 2 days, 8 hours a day, resulted in a lower gemination percentage than other accelerated aging methods and also gave high percentage of abnormal seedling. Keeping seeds at room temperature for 7 days gave similar result as the procedure of Delouche and Baskin. However, number of seed samples tested was too small to draw a definite conclusion. More samples are currently being tested.
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