Effect of Irrigation Disruption at Different Reproductive Growth Stages and Seed Storage Times on Peanut Seed Quality
Keywords:
Germination percentage, mean germination time, germination index, electrical conductivityAbstract
Water requirement of peanut is most crucial during reproductive stage in order to support growth and seed development. At the same time, peanut seed are high in lipid, which affects their storage duration. Therefore, the aim of this study was to evaluate peanut seed quality in which the mother plants were subjected to irrigation disruption during different reproductive stages and various storage periods. This experiment was carried out in December, 2020 at Khon Kaen Field Crops Research Center, Mueang district, Khon Kaen province. The two peanut cultivars, Khon Kaen 9 and Tainan 9 were used in the process of irrigation disruption at difference reproductive growth stages: well-watering (I1), irrigation disruption at flowering to peg stage (I2), irrigation disruption at peg stage to pod development stage (I3), irrigation disruption at pod development stage to seed development stage (I4) and irrigation disruption at seed development stage to maturation stage (I5). After that, storing peanut pod at 0, 2, and 4 months for seed quality test after storage. The results showed that the irrigation disruption at seed development stage to maturation stage elevated the electrical conductivity to 26.81 µS/cm/g. Moreover, seed quality of Tainan 9 was higher than that of Khon Kaen 9. Also, these two peanut cultivars could keep at ambient condition for 4 months, which higher than other storage times, without any effect on seed quality.
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