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1.解除玉兰种子休眠的方法玉兰是我国著名的早春花木,其种子在温室条件下干藏17周仍处于休眠期,低温干藏17周发芽率只有3%,因而育苗相当困难。杭州市植物园、浙江省林业科学研究所等单位反复试验,发现了打破玉兰种子休眠的方法,即在5～15℃室内,将种子用湿沙层积,这样催芽8周就能打破休眠;或用50PPm赤霉素溶液漫种24小时,然后在5～15℃室内将种子用湿沙层积。这样催芽4周就能打破休眠;若用200ppm赤霉素溶液浸种24小时,只需要湿沙层积2周就能解除休眠。采取上述措施后,在圃地播种出苗整齐,发芽率达到85%以上。 2.酒精选种浙江省缙云县林业局利用不同浓度酒精溶液测
1. Unleash the Magnolia seed dormancy method Magnolia is China’s famous early spring flowers, the seeds in the greenhouse conditions for 17 weeks of dry storage is still in dormant period, low temperature dry storage of 17 weeks germination rate of only 3%, so nursery quite difficult. Hangzhou Botanical Garden, Zhejiang Provincial Forestry Research Institute and other units repeatedly tested and found the method of breaking dormancy of Magnolia seeds, that is 5 ~ 15 ℃ indoors, the seeds with wet sand stratification, so that the germination can break dormancy 8 weeks; or 50 g of gibberellin solution for 24 hours, and then in the 5 ~ 15 ℃ indoor seed layer with wet sand. This will sprout 4 weeks to break dormancy; if soaked with 200ppm gibberellic acid solution for 24 hours, only need to wet the stratum 2 weeks will be able to lift dormancy. After taking the above measures, nursery in the nursery sowing, germination rate reached 85%. 2. Alcohol selection Jinyun County, Zhejiang Province Forestry Bureau using different concentrations of alcohol solution measured