不同种源砂生槐种子萌发特性的比较研究

Comparison of Germination Characters of Sophora.moorcroftiana Seed in Different Origins

以3个不同种源的砂生槐种子为研究对象,对种子外部形态特征、千粒重及不同处理条件下其发芽率和发芽势进行了比较分析。结果表明:各种源砂生槐种子的横纵径差异不明显,千粒重之间有差异,其中,日喀则种源千粒重最大。拉萨种源在各水温浸泡后其发芽率较其余2个高,达到42%,3个种源的砂生槐种子随着浸泡水温的升高,其发芽率也表现出逐渐升高的趋势,均表现为沸水浸泡后发芽率达到最大。3个种源的砂生槐种子在不同温度下发芽率不同。温度越高并不表现为发芽率较高,其中拉萨和林芝种源的砂生槐种子在15℃时发芽率最好,日喀则种源在20℃发芽率最好。GA3对砂生槐种子的萌发没有明显的促进作用。切破种皮和酸碱处理均有利于不同种源砂生槐种子的萌发,能在一定程度上提高砂生槐种子的发芽率。

In this experiment,Sophora seeds of three different types of sources for the study, the exter- nal morphology of seed, grain weight, the germination rate and germination potential under different treatment conditions were comparative analyzed. The results showed that： vertical and horizontal sources Sophora seeds diameter difference is not obvious, there are differences between the grain weight,which Shigatse provenance maximum grain weight.Provenance Sophora Lhasa after each soa- king temperature germination rate is higher than the other two types, reaching 42 percent, Sophora seeds of three kinds of sources with immersion in water temperature rises, the germination rate also showed a gradually increased the trend showed maximum germination rate after immersion in boiling water. Sophora seed provenances at three different temperatures in different germination rate. The higher the temperature does not behave as a high germination rate, which Sophora seeds Lhasa and Nyingchi provenance germination rate at 15 ℃ ,the best provenance Shigatse best germination rate of 20 ℃.GAa has no significant role in promoting Sophora seed germination.Cut to break the seed coat and acid treatment are conducive to different provenances Sophora seed germination, can improve the Sophora seed germination rate to some extent.