Guazuma crinita MART.とGuazuma ulmifolia LAM. の種子発芽に対する温度と熱処理の影響

概要

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Germination of the seeds of Guazuma crinita MART. and Guazuma ulnafolia LAM. was investigated, both at constant temperatures of 28℃, 23℃, 18℃, and 13℃, and at alternating temperatures, of 20℃ and 10℃ for 16h following 30℃ and 20℃, respectively, for 8 h. The germination percentage was greater at 28℃ than at the other temperatures ; in G. crinita it was about 50% after eight days and about 80% after 20 days in G, ulmlfolia. but the germination percentage did not increase after that. When the seeds were heated in water at 60℃, the germination percentage at 28℃ after 15 days increased by 33% in both species. Seeds heated in dry air at 40℃ for 0.5 to 2 h, responded favorable only in G. ulwafolia ; the treatment for 2 h was the best.
日本森林学会の論文
1989-02-01