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对青檀 (PteroceltistatarinowiiMaxim .)种子的休眠机理和发芽条件进行了探讨。共设定 5个处理 :剪破种皮、热水处理 (4 0、5 0、6 0和 70℃ )、剪破种皮并变温层积 (0～ 4℃ 16h与 10～ 15℃ 8h)、低温层积 (0～ 4℃ )和变温层积(0～ 4℃ 16h与 10～ 15℃ 8h)。结果表明 ,剪破种皮、剪破种皮并变温层积和热水处理与对照的发芽率均无显著差异 ,说明青檀种子的休眠不是种皮限制所引起的。低温层积和变温层积处理均能打破种子的休眠 ,因而认为青檀种子休眠属于生理休眠。低温层积以 70d为最好 ,发芽率和发芽势分别达 6 7%和 5 5 % ;变温层积以 40d处理效果最好 ,发芽率和发芽势分别达 77%和 5 7%。同时还讨论了 2种层积处理的优缺点
The dormancy mechanism and germination conditions of Pteroceltistatarinowii Maxim seeds were discussed. A total of five treatments were set: seed coat cut, hot water treatment (40, 50, 60 and 70 ° C), shelling of seed coat and temperature stratification (0-4 ° C for 16 h and 10-15 ° C for 8 h) , Cold stratification (0 ~ 4 ℃) and temperature stratification (0 ~ 4 ℃ 16h and 10 ~ 15 ℃ 8h). The results showed that there was no significant difference in the germination percentage between the cut seed coat, the cut seed coat and the temperature-programmed stratification and the hot water treatment compared with the control, which indicated that the dormancy of the seed was not caused by the seed coat limitation. Cold stratification and temperature stratification treatment can break seed dormancy, so that the dormancy seed dormancy belongs to physiological dormancy. 70d was the best for cold stratification, the germination rate and germination potential were 67% and 55% respectively. The treatment with variable temperature stratification for 40 days had the best germination rate and germination potential of 77% and 57% respectively. Also discussed the advantages and disadvantages of the two kinds of stratification