宁夏南部山区马铃薯主栽品种耐霜冻性研究

[目的]研究不同马铃薯品种对霜冻的抗性。[方法]采用露地自然霜冻法,对宁夏西吉县14个马铃薯主栽品种进行耐霜冻性评价研究,霜冻损伤程度调查和系统聚类分析。[结果]晋薯7号、新大平、内薯7号表现为耐霜冻,其他品种均表现为中耐霜冻和霜冻敏感,未发现强耐霜冻性的品种;历年西吉县、固原市的最低气温日数资料表明,西吉县出现低温日数多于固原市。[结论]西吉县遭受霜冻的次数要远多于固原市,相应西吉县气温对马铃薯品种的耐霜冻性压力更大,生产中对品种耐霜冻性的要求更高。

Research on the Frost-resistant of Potato Variety Grown in Southern Mountain of Ningxia Hui Autonomous District

[Objective] The resistance of different potato varieties to frost was experimented.[Method] The resistance of 14 leading potato varieties to frost in Xiji County was tested and evaluated under the condition of natural frost and the extent of frost damage was investigated with the method of cluster analysis system.[Results] The potato variety——Jinshu No.7,Xinshu and Neishu No.7 expressed the resistance to frost.Other varieties were in the middle resistant to frost and sensitive to frost.And,none of varieties showed the strong resistant to frost.The meteorological data indicated the number of low-temperature day in Xiji County was more than in Guyuan city.[Conclusion] The number of frost damage to potato in Xiji County was more than that in Guyuan city.Thus,the more pressure from the frost damage to potato variety was in Xiji County,thus,in production,there was higher demand to the potato with the resistance to forest.