摘要
试验采用了酸、碱、有机试剂、植物激素、热水浸泡、超声波以及擦破种皮等11种方法对4种野生草种进行处理。结果表明:所有方法处理对马唐的种子萌发均没有显著影响(P>0.05);野豌豆种子在擦破种皮处理下,发芽率从1.11%提高到96.67%,达到极显著水平(P<0.01),其他处理对野豌豆种子发芽率均无明显影响(P>0.05);香附子和稗草种子在20%NaOH的方法处理下,发芽率分别从10%和2.22%提高到86.67%和58.33%,均达到极显著水平(P<0.01);此外,1 000mg/L赤霉素浸种处理也可极显著提高香附子种子的发芽率(P<0.01)。其他方法处理对香附子和稗草种子发芽率均无明显影响(P>0.05)。不同野生草种的休眠特性不同,试验选用的马唐种子无休眠性;野豌豆种子需物理破皮;20%的NaOH和1 000mg/L赤霉素处理可打破香附子种子休眠;20%的NaOH处理能打破稗草种子休眠。
The effects of different methods（treatments of acid,alkali,plant hormones,high temperature,ultrasonic wave and scraping seed coat）for breaking the seeds dormancy of 4wild grass species（Cyperus rotundus,Digitaria sanguinalis,Echinochloa crusgalli and Vicia）were studied.The results showed that all the treatments had no significant effect on the seed germination of D.sanguinalis（P〉0.05）.The seed germination of Vicia was significantly improved from 1.11%to 96.67%（P〈0.01）by scraping seed coat,and no significant effect was observed for other treatments（P〉0.05）.By soaking seeds in 20% NaOH solution for 30 min,the seed germination of C.rotundus and E.crusgalli were significantly increased from 10% and 2.22%to 86.67%and 58.33%respectively（P〈0.01）.In addition,the seed germination of C.rotundus was also significantly increased by the treatment of 1 000mg/L of GA3（P〈0.01）.And other treatments had no significant effect on the seed germination rate of C.rotundus or E.crusgalli（P〉0.05）.These results indicated that different species of wild plant seeds had different dormancy characteristics.D.sanguinalis seeds had no dormancy.The seed coat of Vicia should be scraped to improve the germination.20% of NaOH and 1 000mg/L of GA3 could break the seed dormancy of C.rotundus.20% of NaOH could break the seed dormancy of E.crusgalli.
出处
《草原与草坪》
CAS
CSCD
2015年第5期37-42,共6页
Grassland and Turf
基金
国家自然科学基金(31101764)
扬州大学大学生学术科技创新基金(X2014607)资助
关键词
野生草种
破除休眠
发芽率
wild grass species
dormancy-breaking
germination
