摘要
以采集于甘肃省和青海省等地的8份垂穗披碱草（Elymus nutans）种质为材料,采用纸上发芽法在5、10、15、20、25、30、35和40℃8个恒温条件下,研究种子的萌发适宜温度和温度阈值。结果表明,所有供试垂穗披碱草种子在5~35℃条件下可萌发,在40℃不萌发;以20、25和30℃发芽最快,发芽率在3 d内可达最大值,根据种子萌发温度模型计算得出,供试垂穗披碱草种子萌发的最低温度（Tb）、最适温度（To）和最高温度（Tc）的平均值分别为4、24和38℃,种质间无显著差异（P〉0.05）。建议垂穗披碱草种子的适宜检验温度为20、25和30℃恒温,初次和末次的适宜统计时间分别为第3天和第11天。
The germination appropriate temperature and temperature threshold of Elymus nutans seeds for eight populations which were collected from Gansu Province and Qinghai Province were studied.The germination tests were subjected to 8 temperature treatments which were 5,10,15,20,25,30,35 and 40 ℃.The results showed that the seeds could germinate from 5 to 35 ℃,and was inhibited by 40 ℃.The germination and germination index had no significant differences（P0.05） under 20,25 and 30 ℃.According to the seed germination thermal model（T,℃）,the seed germination temperature threshold was calculated.Tb,To and Tc of all E.nutans germplasm had no significant differences（P0.05）,their average were 4,24 and 38 ℃.We suggested that the temperature which was suitable for inspectioning of E.nutans were 20,25 and 30 ℃,and the germination count time of the first time and the last time were the third day and the eleventh day,separately.
出处
《草业科学》
CAS
CSCD
北大核心
2011年第6期988-992,共5页
Pratacultural Science
基金
国家重点基础研究发展计划(973项目)(2007CB108904)
国家自然科学基金(30771532)
兰州大学中央高校基本科研业务费专项资金(lzujbky-2009-5)
关键词
种子萌发
垂穗披碱草
萌发温度
温度阈值
seed germination
Elymus nutans
germination temperature
temperature threshold
