【摘要】 野生山楂种子在变温（－１～２０℃）条件下层积比仅在低温（２～５℃）下层积能显著缩短休眠期。变温层积以先经过一定时期高温（１０～２５℃），再经低温处理（－１～５℃）有利于打破休眠。在适宜温度条件下，（－１～２０℃），经过一个低温时期即可萌发和生长，再一次否定了山楂种子是双重休眠的观点。更多还原

【Abstract】 The result showed,the dormant period of withawthorn seed in the stratificationcondition a changed temperature( -1～20℃) was notably shorter than that at the lowtemperature( 2～5℃) It was advantageous to break dormancy that stratification atchanged temperature underwent a certain period at high temperature (10～25℃)at fist,and then went through a low temperature(-1～5℃) period. Under suitable temlpera-ture(-1～20℃),and passing one low temperature period,the seed could germinate andgrow,This deniedthe idea that hawthorn seed is dually dormant again。更多还原