乾濕藏影響小西氏楠種子的活力

Effect of Dry and Wet Storage on the Seed Viability of Machilus konishii Hay

簡慶德(Ching-Te Chien) ； 高毓斌(Yu-Ping Kao) ； 林讚標(Tsan-Piao Lin)

《林業試驗所研究報告季刊》 10卷3期 (1995/09) Pp. 337-340

https://doi.org/10.7075/BTFRI.199509.0337

摘要

本文旨在利用不同溫度下進行乾濕藏試驗以研究小西氏楠種子的儲藏特性。在同一相對濕度下，種子儲藏5℃之壽命比15℃長，原因之一是低溫使得種子含水率在儲藏過程中下降較緩。在同一濕度下儲藏於33%相對濕度之種子壽命比82%相對濕度短。換言之，種子含水率愈低，受到之傷害愈大。其中以在82%相對濕度在5℃下之種子儲藏壽命較長，但初期種子發芽率下降較33%相對濕度為快的原因目前無法解釋。5℃濕藏並不能有效延長小西氏楠種子壽命，最多只能維持2個月原來種子的發芽率。

關鍵字

小西氏楠 ； 種子活力 ； 乾濕藏 ； 異儲型種子 ； 乾燥敏感

並列摘要

This study characterized the storage of Machilus konishii Hay. Seeds at various temperatures under dry and wet conditions. Seeds dry-stored at either 33% or 82% relative humidity (r. h.) showed longer life spans at 5℃ than at 15℃ because the seed moisture content decreased at a slower rate under low temperature regime. The life span of M. konishii seeds was shorter at 33% r. h. than at 82% r. h. when stored at the same temperature. Also, the lower the moisture content, the greater the seed damage which occurred. Seeds stored at 5℃ and 82% r. h. had a longer life span, but a rapid decrease of germination in the initial six-week storage is inexplicable at present. Wet storage 5℃did not effectively extend the life span of M. konishii seeds and seed viability was maintained for only two months.

並列關鍵字

Machilus konishii ； seed viability ； dry and wet storage ； recalcitrant seed ； desiccation sensitivity