温度和光照对菊苣种子萌发的影响

Effect of Temperature and Light on Seed Germination of Cichorium intybus L.

为提高菊苣种子发芽率和确定适宜播期,研究了温度和光照对菊苣种子萌发的影响。种子发芽试验的温度分别为15、20、25、30、35℃;光照条件分别为光照、暗期中断和黑暗3种条件。结果表明:在25、30℃条件下,种子发芽时间短,发芽率、发芽指数高,说明菊苣种子萌发最适温度为25～30℃;温度过高和过低均可导致发芽期延长,使发芽率和发芽势降低。暗处理不会抑制菊苣种子萌发,但光照对其发芽有促进作用。

In order to improve seed germination rate and identify suitable sowing date, the effects of tempera- tures and light on germination of Cichorium intybus L. seeds were studied. The test temperature was 15,20, 25,30,35 ℃, respectively, the light condition was light treatment, dark break treatment and dark treatment. The results showed that under the condition of 25 and 30℃, the germination time was short,germination rate and germination index was high,it indicated that the optimal temperature for germination of Cichorium intybus L. was 25 - 30℃ ;The germination time was prolonged, the germination percentage, germination potential were de- creased under too low and too high temperature conditions. The dark treatment could not resist Cichorium inty- bus L. seed germination, however,light treatment could promote germination percentage and germination poten- tial of Cichorium intybus L. seeds.