【摘要】 对来自不同地区的5个洽草种群的种子做了不同的处理萌发试验,结果表明:总的来说在3种温度处理的对照组中,洽草种子在25℃恒温下的萌发率效果最佳,低温显著降低了洽草种子的萌发率。而利用赤霉素浸泡种子后,在15℃恒温下所有洽草种群的种子萌发率从50%左右都提高到87%,萌发总天数缩短了8～10d;而在25℃恒温下,除了大青山的DY、DS洽草种子外,其他3种洽草的萌发率都提高。经过硫酸铜处理后只有来自锡林郭勒白音希勒(XD)地区洽草种子萌发率提高了0.2个百分点,其它经过硫酸铜处理的洽草种子平均萌发率下降了7～15个百分点;在15℃恒温下,经过硫酸铜处理的洽草种子都没有萌发。更多还原

【Abstract】 At different temperatures and pharmaceutical treatment,we studied germination characteristics of 5 Koeleria cristata(L.) Pers population’s seeds from three regions.The results showed that:(1) In 25 ℃ constant temperature,the average germination rate of Koeleria cristata(L.) Pers seeds are 88.16%,total germination time is 8d;In varied temperature and 15 ℃ constant temperature,the average germination rate are 80% and 50.8%,total germination time is 13d and 14d,low temperature significantly reduced germination rate and delayed the germination process of Koeleria cristata(L.) Pers seeds.(2) In 25 ℃ constant temperature,Koeleria cristata(L.) Pers seeds from Da Qing Shan region had highest germination rate,is up to 94%;In varied temperature,Koeleria cristata(L.) Pers seeds from Zhao He region had highest germination rate,is up to 85.20 %.(3) after soaking the seeds in gibberellic acid,in 15 ℃ constant temperature all seeds germination rate generally increased from 50% to 87% and the total germination time shortened by 8-10d;But in 25 ℃ constant temperature germination rate of k seeds from Da Qing Shan region decreased to 84%,from the Xilin Go LE Grassland,Zhao He grass region have been increased.更多还原