厚藤种子萌发特性

以厚藤Ipomoea pes-caprae种子为试验材料,测定其种子的大小、千粒质量、硬实率、生活力以及在不同处理条件下的发芽势和发芽率。结果表明：机械处理下的效果最好,其种子平均发芽势和发芽率均提高到95.3%;其次为980 g.kg-1硫酸处理90 min较好,平均发芽势达到91.2%,发芽率达93.5%;氢氧化钠处理也可明显提高厚藤种子萌发能力,400 g.kg-1氢氧化钠处理36 h的平均发芽率可达79.4%;不同温度处理以25~30℃的萌发能力最强,其发芽势为24.6%,发芽率为43.4%。实际工作中,可以采用机械处理或酸碱处理的方法以提高厚藤种子的萌发能力。图2表4参18

Seed germination of Ipomoea pes-caprae(L.) Sweet

In this research the influence of different treatments on seed germination characteristics of Ipomoea pes-caprae were studied to determine effective measures for enhancing the germination rate and germination potential.Treatments included a mechanical treatment,98% H2SO4 solution for 90 min,40% NaOH solution for 36 h,and a temperature treatment between 15-20,20-25 and 25-30 ℃.Results showed that the mechanical treatment was best with both the average germination potential and average germination rate of 95.3%.Also,with the H2SO4 solution,the average germination potential was 91.2%,and the average germination rate was 93.5%.The NaOH solution treatment improved the average germination potential to 79.4% and the average germination rate to 40%.For the temperature treatment,germination was highest when temperatures were between 25-30 ℃ with the average germination potential reaching 24.6% and the average germination rate attaining 43.4%.Thus,the mechanical,the 98% H2SO4,or the NaOH solution treatments could improve seed germination of I.pes-caprae.Ch,2 fig.4 tab.18 ref.]