不同贮藏条件对苦荬菜种子活力的影响

以牧草苦荬菜种子为材料,选取4个种子含水量(6.94%、3.27%、1.24%、0.98%)及6个贮藏温度(常温、25℃、15℃、10℃、3℃、-15℃),连续贮藏5个时期(3个月、6个月、9个月、12个月、16个月),研究不同贮藏条件对苦荬菜种子活力的影响。结果表明:贮藏温度和种子含水量均对苦荬菜种子活力有显著影响;贮藏温度在-15~15℃条件下,苦荬菜种子活力相对较高(贮藏16个月发芽率33%~42%),常温和25℃条件下种子活力下降明显,到16个月时种子活力几乎完全丧失(发芽率1.9%~2.4%);种子贮藏的最适含水量受贮藏温度的影响,贮藏温度越高,最适含水量相对要求越低。贮藏温度25℃,种子含水量为0.98%、1.24%、3.27%时种子发芽率相对较高,分别为30%、30%、34.7%,与种子含水量6.94%的种子发芽率(14%)有显著性差异(P<0.05)。

Effect of Different Storage Conditions on Indian Lettuce Seed Vigor

Effects of different storage conditions,four seed moisture contents of 6.94%,3.27%,1.24% and 0.98% and six storage temperatures,normal temperature,25℃,15℃,10℃,3℃ and-15℃,together with five storage periods of 3,6,9,12 or 16 months on Indian lettuce seed vigor were studied in this paper.The result showed that both the storage temperature and seed moisture content significantly affect Indian lettuce seed vigor.Under the storage conditions of-15℃-15℃,the Indian Lettuce seed vigor was relatively high(germination rate was 33%-42% through 16 months storage) while under the storage conditions of normal temperature or 25℃,the vigor of Indian Lettuce seed significantly decreased and the seed vigor was almost completely lost after stored for 16 months(germination rate was 1.9%-2.4%).The optimum seed moisture content was influenced by storage temperature.When storage temperature was 25℃ and the seed moisture contents were 0.98%,1.24% or 3.27%,the seed germination rates were 30%,30% and 34.7%,respectively.Whereas the germination rate was only 14% when seed moisture content was 6.94%,significant different from the formers(P<0.05).