关键词: 芦笋, 低温, 休眠解除, 内源激素

Abstract: Three-year-old plants of‘Applo’were used to study the effect of low temperature on bud break and changes of endogenous hormones in bud of asparagus（Asparagus officinalis Linn）. The results showed that asparagus plant showed rapid bud break and spear growth when it was incubated on Oct. 30. But when it was incubated on Nov. 14 or 29，bud break and spear harvest decreased. While when it was incubated on Dec. 14 or later，the bud break had no difference with that incubated on Oct. 30，but spear harvest increased. These results suggested that once asparagus plants underwent the period of dormancy induced by the chilling in winter，they needed sufficient chilling duration to restore the activity of bud break and spear growth. The experiment of different low temperature treatment revealed that 2 ℃ 30 d or 5 ℃ 45 d could sastify the chilling duration of‘Applo’. During natural or treated chilling period，the content of GA3，IAA and ZR in bud of asparagus was relatively stable，but the content of ABA increased during dormancy stage，and then decreased rapidly to a lower level. The changes of ABA content had close relationship with dormancy and dormancy-breaking of asparagus.

Key words: asparagus, low temperature, dormancy breaking, endogenous hormones