实验室冷冻法鉴定2个冬小麦品种抗寒性研究  

The cold resistance of two winter wheat cultivars appraised by the freezing method in a experiment room.

作　　者：张淑霞 钟阳和[2] 魏淑秋[2] 

机构地区：[1]共青团中央青农部,北京100051 [2]中国农业大学资源与环境学院,北京100094

出　　处：《中国生态农业学报》2003年第3期38-40,共3页Chinese Journal of Eco-Agriculture

基　　金：冬麦北移试验示范开发项目"冬麦北移种植区划与品种区划"资助

摘　　要：以实验室冷冻法研究模拟东北、内蒙古自治区赤峰等地区麦田土壤温度日变化规律,测定“Norstar”、“米罗诺夫808”2个冬小麦品种的生理生态抗寒性,1月份(隆冬季节)2个冬小麦品种的死亡率为50％时临界温度值(LT50)分别为-27.7℃和-26.3℃,死亡率专20％时临界温度值(LT20)分别为-26.2℃和-23.9℃。返青期2个冬小麦品种的死亡率为50％时临界温度值分别为-12.9℃和-11.7℃,死亡率为20％时临界温度值分别为-10.0℃和-8.9℃。Imitating the regularity of temperature variation in the winter wheat field of Chifeng City, in Inner-mongolia and the northeast regions by using the freezing method, two hardier cultivars 'Norstar' and ' Mironovskaja 808 'are selected to determine their lethal temperatures. The LT20 of 'Norstar' and 'Mironovskaja 808' is - 26. 2℃ and - 23.9℃, the LT50 is 27. 7℃- and - 26.3℃ respectively in January; the freezing tolerance of the varieties in February is less-hardened,their LT20 is 10.0℃ and -8.9℃and the LT50 is - 12.9℃ and - 11.7℃ respectively.

关 键 词：冬小麦 鉴定 实验室冷冻法 临界温度值 生理生态抗寒性 品种 

分 类 号：S512.11[农业科学—作物学]