【摘要】 通过田间越冬指数调查、组织变褐法和电导法配合Logistic方程求拐点温度的方法 ,对 7个从美国引入的扁桃品种的抗寒性进行评价。结果表明 :扁桃幼树 1年生休眠枝的低温半致死温度 (LT50 )为- 18.0～ - 2 4 .5℃ ;其中‘Butte’和‘Padre’的抗寒性较强 ,半致死温度约为 - 2 4 .5℃ ;‘Nonpareil’、‘Price’和‘Monterey’的抗寒性中等 ,半致死温度约为 - 2 0 .9℃ ;‘NePlus’和‘Sonora’的抗寒性较弱 ,半致死温度约为 - 18.3℃。更多还原

【Abstract】 Cold hardiness for seven introduced almond cultivars was evaluated by winter injury index, trunk cambial browning (TCB) and electrolytic conductance test (EC) with logistic equation. The results showed that the low temperature for 50% (LT 50 ) of one year excised dormant shoots from young tree to be killed was -18.0 to -24.5℃ . Classification of cold hardiness of these cultivars was evaluated by system analysis, the results were as follows: 1) the hardy cultivars included Butte and Padre which could bear -24.5℃; 2) Nonpareil, Price and Monterey belonged to the medium hardy ones, whose LT 50 was about -20.9℃; 3) the tender cultivars included Ne Plus and Sonora whose LT 50 was about -18.3℃.更多还原