The Effects of the Temperature and Other Several Conditions of the Seed of Nine Species in Fagaceae for Planting on Germi Tion

27 Mar The Effects of the Temperature and Other Several Conditions of the Seed of Nine Species in Fagaceae for Planting on Germi Tion

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Abstract

本研究では, ブナ科樹種9種の種子の発芽温度特性を検討した。アラカシ, シラカシ, アカガシは低温湿層で長期保存すると発芽速度が増加し, シラカシとアカガシは発芽率も増加した。コナラ, スダジイでは長期保存により発芽率, 発芽速度は低下した。ウラジロガシ, イチイガシは, それぞれ23℃と16℃で発芽率発芽速度ともに最大となり, クヌギは9～30℃の範囲で発芽率が80%以上であった。マテバシイは30℃で発芽速度が, 9℃で最終発芽率が最大となった。本研究で供試した樹種において, 種子発芽に与える温度の影響は樹種により異なった。また, 種子の産地の違いが, 樹種ごとの発芽温度特性に与える影響は, 見いだせなかった。

English Abstract

In order to clarify the effects of storage term and post-storage temperature on germi tion of the seeds of nine species in Fagaceae, germi tion speed and germi tion rate were examined using the seeds stored under a wet (75%RH) and cold (4°C) condition. Experimental conditions were as follows.(1) Post-storage temperature: 9°C, 16°C, 23°, 30°C and 35°C.(2) Storage term: long (127-175 days) and short (15-70 days).
Germi tion speed and germi tion rate of Quercus myrsi efolia and Q. acuta were higher in long-term storage. Germi tion speed of Q. glauca was higher in long-term storage. On the other hand, germi tion speed and germi tion rate of Q. serrata and Castanopsis cuspidata var. sieboldii were lower in long-term storage.
Germi tion speed and germi tion rate of Q. salisi were the highest at 23°C, and those of Q. gilva were the highest at 16°C. Germi tion rate of Q. acutissima under temperatures between 9 and 30°C were over 80%. Germi tion speed and germi tion rate of Pasania edulis were the highest at 9°C and 30°C, respectively. Each species of Fagaceae had their own germi tion characteristics affected by temperature. And geographical difference of germi tion characteristics within a species were not clear.