【摘要】 通过7种不同温度、不同时间的层积处理研究其对北美鹅掌楸种子发芽的影响。结果表明:低温层积处理能显著促进北美鹅掌楸的种子萌发。在2℃、层积处理时间为60d的条件下种子发芽效果最好,种子绝对发芽率为86.84%,发芽速度最快;在2~12℃变温层积处理56d的条件下,种子绝对发芽率为80.71%,种子发芽较快。在7℃,层积处理时间为30d的条件下种子发芽效果最差,种子绝对发芽率为62.29%。更多还原

【Abstract】 Effects of seven stratification treatments at different temperature and time on seed germination of tuliptree(Liriodendron tulipifera L.) were studied:(1)2℃,30d;(2) 2℃,60d;(3) 7℃,30d;(4) 7℃,60d;(5) 2～12℃ change temperature,28d;(6)2～12℃ change temperature,56d;(7)CK(water soakage 12h).The results revealed that low temperature stratification could promote tulip tree seed germination remarkably.Under the stratification of 2℃,seed germination could be quickest,and the seed absolute germination percentage could reach 86.84% after 60 days′stratification.When temperature variable(2～12℃) and less time(56 days),the seed absolute germination percentage was 80.71%.While stratification in 7℃ and 30 days,the seed absolute germination percentage would be the lowest(only 62.2% in this experiment).更多还原