兰州地区引种的美国扁桃的越冬伤害与临界致死低温  

Winter Injury Index and Lethal Low Temperature for Introducted American Almond in Lanzhou, China

作　　者：潘晓云[1] 王根轩[1] 曹琴东[2] 

机构地区：[1]兰州大学干旱农业生态国家重点实验室,兰州730000 [2]甘肃省绿色食品办公室,兰州730030

出　　处：《园艺学报》2002年第1期63-65,共3页Acta Horticulturae Sinica

基　　金：国家自然科学基金资助项目 (3 9770 44 7) ;国家重大基础研究专项基金项目 (G19990 1170 5 )

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℃。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℃.

关 键 词：兰州地区 引种 美国扁桃 临界致死低温 越冬伤害指数 低温半致死温度 抗寒性 

分 类 号：S662.9[农业科学—果树学]