几种因素对烟草种子萌发的影响

Effects of Several Factors on Germination of Tobacco Seeds

烟草种子萌发受到内因和外因的影响,为探究烟草种子萌发的最适条件,本研究设置了烟草类型、贮藏年限、温度、激素和酸碱对烟草种子发芽的影响试验。结果表明,同一年限不同类型的品种发芽率依次为:雪茄烟 >烤烟 >马里兰烟 >野生烟 >晒烟 >白肋烟 >香料烟;烟草种子发芽率随贮藏年限的增加而降低;30℃条件下,烟草种子的萌发情况最好;对种子萌发促进作用最大的是质量浓度为20%的PEG浸种48小时,可促进发芽率大幅提高;质量分数为20%的NaOH和质量分数为10%的H2SO4对烟草种子的促进作用是最明显的,分别促进2.67%和3%。

The germination of tobacco seeds was affected by internal and external factors. In order to explore the optimum conditions for the germination of tobacco seeds, five experiments were used to in-vestigate the effects of tobacco type, storage durations, temperature, hormone and acid-base on the germination of tobacco seeds. The results showed that the germination rate of different types of varieties in the same year were as follows: Cigar >Flue-cured tobacco >Maryland tobacco >wild tobacco >Sun-cured tobacco >Burley >Oriental tobacco. Germination ability of tobacco seeds decreased with the increase of storage life. Under the condition of 30?C, the germination of tobacco seeds was the best. The greatest effect on seed germination was the 20% mass concentration of PEG soaked for 48 hours, the germination could be promoted by 16%;The promotion effect of NaOH with mass fraction of 20% and H2SO4 with mass fraction of 10% on tobacco seeds was the most obvious, which promoted 2.67% and 3% respectively.