枫杨种子休眠与萌发特性研究  

Research on Seed Dormancy and Germination Characteristics of Pterocarya stenoptera Seeds

作　　者：王宝龙 徐君霞 李明月[2] 赵彤彤[2] 张鹏[2] Wang Baolong;Xu Junxia;Li Mingyue;Zhao Tongtong;Zhang Peng(Jiaohe Forest Bureau, Jiaohe 132500;School of Forestry, Northeast Forestry University, Harbin 150040)

机构地区：[1]蛟河市林业局,吉林蛟河132500 [2]东北林业大学林学院,哈尔滨150040

出　　处：《森林工程》2018年第2期11-15,共5页Forest Engineering

基　　金：国家十二五"科技支撑计划课题(2011BAD08B02-02)

摘　　要：为了确定枫杨种子的休眠原因及其打破休眠的方法,以枫杨成熟种子为材料,对种子透水性、种子浸提物的生物抑制作用、种子催芽处理效果以及种子在不同温度下的萌发能力进行研究。结果表明:枫杨种子种皮透水性良好,种子浸提液中存在发芽抑制物质,抑制物质的存在是造成种子休眠的主要原因。直接埋藏和混雪后埋藏解除枫杨种子休眠的效果不理想;低温层积解除种子休眠效果较好,层积时间达到120d时种子萌发率可以达到89%。温度显著影响枫杨种子的萌发,25℃的恒温条件下种子萌发能力显著高于其它温度条件。结论:枫杨种子不存在物理休眠,属于生理休眠类型,种子需要低温层积处理120d打破休眠,解除休眠种子的适宜萌发温度是25℃。In order to determine the cause of seed dormancy and the method for breaking dormancy,the Pterocarya stenoptera seeds were used to study the seed permeability,the biological inhibition of seed extract,the effect of seed germination and the seed germination at different temperatures.The results showed that the water permeability of seed coat in Pterocarya stenophylla was good.There was germination inhibiting substances in the extract of Pterocarya stenoptera seeds,and the inhibitory substances may be the main cause of seed dormancy.Outdoor overwinter burying and outdoor stratification with snow had no obvious effect on dormancy breaking.Indoor cold stratification to remove seed dormancy was better.When cold stratification time reached120days,the germination rate was89%.The temperature significantly affected the seed germination,and the germination ability under25℃was better than other temperature regimes.In conclusion,the Pterocarya stenoptera seed was not physical dormancy but physiological dormancy,and120days cold stratification was needed to break seed dormancy.The best germination temperature for dormancy released seeds was25℃.

关 键 词：枫杨 种子休眠 种子萌发 层积处理 萌发温度 

分 类 号：S682[农业科学—观赏园艺]