| In order to study the Temperature Characteristic of Winter BudsDormancy in Idesia policarpa from different Provenances for exploring thecharacteristics of winter buds dormancy in Idesia policarpa that distributed in thecontinental climate, riching the theory of winter hibernation and for regulating thegrowth and development of Idesia policarpa, protecting and developing germplasmresources of Idesia policarpa, breeding good varieties, providing theoretical basis. Theresults were as follows:(1) The Idesia policarpa that distributed in the continental climate has winter buddormancy characteristics and only experienced low temperature before re-growth.(2) The low temperature time of terminal and lateral buds re-growth is different. Thelow temperature time of terminal buds longer than lateral buds of Henan and hunanprovenance, lateral buds longer than terminal buds of Jiangsu provenance, the time isbasically the same of Sichuan provenance.(3) The effective low-temperature is different of terminal buds in Idesia policarpafrom different Provenances. The best effect is10℃, followed by5℃, the lowtemperature effect is not obvious more than12℃of Jiangsu and JiangxiProvenances. The best effect is5℃, followed by5℃the sprouting rate on theterminal bud is better but the growth is no good than lateral buds of the other fourprovenances.(4)The best effect is25℃, followed by12℃of lateral buds re-growth.(5)15℃has the effect that releases the dormancy of terminal buds in Idesiapolicarpa, but the effect is not obvious on terminal buds re-growth.(6)Not only the sprouting rate and growth increased is obviously of terminal buds, butalso the sprouting rate and growth is significant limited of lateral buds afterprechilling of40d and60d at5℃and10℃then put in the15℃and25℃conditions. The sprouting rate and growth increased is obviously of lateral buds afterprechilling of20d at5℃,10℃and15℃then put in the15℃and25℃conditions of Sichuan provenance. |
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