纳米TiO2光催化剂对藏茵陈种子萌发能力的影响

摘要

[目的]为藏茵陈的人工栽培提供理论依据.[方法]以川西獐牙菜和抱茎獐牙菜2种藏茵陈种子为材料,用纳米TiO2溶液对其进行浸种处理,以清水处理为对照,研究浸种时间、TiO2浓度及光照条件对种子发芽率及发芽势的影响.[结果]当TiO2浓度为400 mg/g时,川西獐牙菜种子的发芽势及发芽率分别较对照高16.4%和17.5%,当TiO2浓度为200 mg/g时,抱茎獐牙菜种子的发芽势及发芽率分别较对照高14.1%和17.2%;浸种9、12 h时,川西獐牙菜种子的发芽势及发芽率分别为74.4%、79.3%和74.1%、77.7%;浸种12 h时,抱茎獐牙菜种子的发芽势及发芽率分别为56.9%和83.8%;日光照射下,川西獐牙菜和抱茎獐牙菜种子的发芽势及发芽率分别为71.7%、73.2%和81.4%、86.9%.[结论]纳米TiO2浸种可提高藏茵陈种子的萌发能力.%[Objective] The aim was to provide the theoretical basis for artificial cultivation of Tibetan capillary. [Method] With the seeds of 2 kinds of Tibetan capillary Swertia mussotii Franch and Swertia frachetiana H. Smith as the materials, they were soaked in nano-TiO2 solution. With the treatment by clear water as CK, the effects of soaking time, TiO2 concn. and light condition on germination rate and germination energy of seeds were studied. [Result] When TiO2 was 400 mg/g, the germination rate and germination energy of S. mussotii seeds were 16.4% and 17.5% higher than those of CK resp. When TiO2 was 200 mg/g, the germination rate and germination energy of S. frachetiana seeds were 14.1% and 17.2% higher than those of CK resp. When soaking time were 9, 12 h, the germination rate and germination energy of S. mussotii seeds were 74.4%, 79.3% and 74.1%, 77.7% resp. When soaking time was 12 h, the germination rate and germination energy of S. frachetiana seeds were 56.9% and 83.8% resp. Under sunlight radiation, the germination rate and germination energy of the seeds of S. mussotii and S. frachetiana were 71.7%, 73.2% and 81.4%, 86.9% resp. [Conclusion] Seed soaking with nano-TiO2 could increase the germination capacity of Tibetan capillary.