紫椴种子解除休眠及催芽育苗方法的研究  

Study on the Methods of Removing Dormancy and Promoting Seedlings of Tilia amurensis

作　　者：韩友志[1] HAN Youzhi(Liaoning Academy of forestry,Shenyang 110032)

机构地区：[1]辽宁省林业科学研究院,沈阳110032

出　　处：《林业资源管理》2020年第1期177-182,共6页Forest Resources Management

基　　金：辽宁省科学事业公益研究基金“刺楸等乡土珍贵阔叶树种种质资源挖掘及培育(GY-2018-0011)”;辽宁省科学技术计划项目“刺楸等珍贵阔叶树种繁育及造林技术研究(辽[2018]LKY16)”;林业公益性行业科研专项“浑河流域现代林业生态体系建设技术研究与示范”(200904064)。

摘　　要：采取不同浸种方法、GA3应用和层积催芽对比试验,对紫椴种子解除休眠方法进行研究。结果表明:温水(7d)+GA3+室内(13~18℃,30d)+室外冷冻(60d)+窖藏(-2~2℃,60d)为最佳处理组合,发芽率和出苗率为84.7%和79.5%,出苗整而齐(25d全苗);苗木质量好,1a生平均苗高和平均地径分别为0.55m和0.56cm,主根长25.5cm,侧根25条。GA3浸种对紫椴种子解除休眠具有促进作用,层积催芽室内高温+室外冷冻+低温窖藏效果最好,高低变温效果次之,低温窖藏效果再次,而室内高温效果最差。研究表明,紫椴为综合性休眠类型,采用浸种+GA3+合理层积催芽,能有效解除种子休眠。Different soaking methods,GA3 application and stratified germination experiments were used to study the dormancy removing methods of Tilia amurensis seeds.The results show that:warm water(7 d)+GA3+Freezing(13-18℃,30 d;Freezing,60 d;-2-2℃,60 d)was the best treatment combination,the germination rate and seedling emergence rate were 84.7% and 79.5%,the seedlings emerged neatly(whole seedling for 25 days);and the quality of seedlings was good,the one-year-old average seedling height and ground diameter were 0.55 M and 0.56 cm,the main root length was 25.5 cm and the lateral root length was 25.GA3 soaking seed can promote the removing dormancy of Tilia amurensis seeds,the effect of stratification germination that the freezing effect of indoor high temperature+outdoor freezing+low temperature cellar is the best,followed by high and low temperature change,low temperature cellar effect again,and indoor heat is the worst.The results showed that Tilia amurensis belong to combinational dormancy,seed dormancy could be effectively removed by soaking seeds+GA3+reasonable stratification.

关 键 词：紫椴 层积催芽 解除休眠 播种育苗 苗木质量 

分 类 号：S723.1[农业科学—林木遗传育种]