Effect of different presowing treatments on germination of 10 forest tree seeds
2000
Pisal Wasuwanich | Chamnong Kanchanaburangura | Pathum Boonarutee(Royal Forest Dept., Bangkok (Thailand). Forest Research Office. Silviculture Research Div.)
Study on effects of seed presowing treatments on germination of 10 forest tree species, after storage for 1 year, was conducted 10 increase the germination rate of the seeds by considering germination value. Five different presowing treatments were used, including seed cutting at the opposit end to the radicle, soaking seeds in conc sulphuric acid for 15 minutes, soaking seeds in boiling water at 98 deg C and leave them cool for 24 hours, soaking seeds in water (30 deg C) for 24 hours and control. The result showed that seed cutting was the most suitable presowing treatment to increase seed germination of 8 species, including Acacia catechu, Cassia bicapsularis, Cassia fistula, Cassia garrettiana, Cassia siamea, Cassia surattensis, Dalbergia oliveri. Whereas treating the seeds with conc sulphuric acid was effective for Cassia siamea, Cassia garrettiana and Dalbergia cultrata. For Delonix regia seeds, germination can be improved by soaking the seeds in boiling water at 98 deg C and leave them cool for 24 hours. However, no significantly difference in seed germination of C. garrettiana and C. siamea after treating with seed cutting method and with conc. sulphuric acid.
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