摘要
设置了6种恒温、5种变温,对22种多年生禾本科牧草种子进行发芽试验,根据各温度下的发芽率、发芽指数、最初萌发时间等指标,来探讨发芽的最适温度。结果表明,供试种子在变温下的发芽率普遍高于恒温下,20℃时种子在萌发的第9d按发芽指数统计有13种达最大值,所有品种的发芽指数对温度反应的排序为5<10<10~15<15<20℃,各牧草种子的发芽最初萌发时间随温度的升高而缩短,发芽的最适温度因种和品种而异,本试验的22种牧草发芽最适温度在15~25℃之间。
Optimum temperatures have been found out by examining germination rate, germination rate index and pregermination duration of 22 perennial grass specieses. under constant temperatures and 5 variant temperatures. Results were shown as following: germination rate was higher under variant temperatures than that under constant temperatures, germination rate index of 13 specieses reached maximum on 9th day under temperature of 20 ℃, response of all specieses to temperatures ranged as 5<10<10~15<15<20 ℃, pre-germination duration of all specieses decrease along with increase of temperature, optimum temperature varied with speciese, but was defined as 15~25 ℃ for 22 specieses.
出处
《草业科学》
CAS
CSCD
北大核心
1998年第4期22-26,共5页
Pratacultural Science
关键词
发芽温度
禾草种子发芽率
发芽指数
最初萌发时间
Temperature for germination, germination rate of grass species, germination rate index, pre-germination duration