石蒜属植物的无性繁殖研究

通过茎盘沟切的方式,设计随机区组试验在峨眉山生物资源实验站开展峨嵋山本地植物忽地笑与引种植物长筒石蒜的无性繁殖试验,研究生长调节剂及其浓度对分生子球性状的影响。研究结果表明：①与自然分球相比,人工干预可明显提高种球的繁殖率。试验中忽地笑的平均繁殖率为21.15,其中＂6-BA500＂作用下繁殖率高达32.2;长筒石蒜的平均繁殖率为7.93,＂NAA250＂作用下繁殖率最高,为12.9;②NAA、6-BA促进种球的繁殖能力,且随着浓度的增加种球的繁殖系数也相应增加,而GA3则起到抑制作用。生长调节剂NAA对忽地笑繁殖率的影响明显大于长筒石蒜;③综合繁殖率、子球的平均重量、平均直径以及根的长势情况,＂6-BA300＂是忽地笑繁殖的最佳组合,＂NAA200＂是长筒石蒜繁殖的最佳组合。

Studies on Vegetative Propagation in the Genus Lycoris

Genus Lycoris’s natural propagation coefficient is low.An experiment of incising bulbs of Lycoris aurea and L.longituba,in Emei Mountain Biotic Resource Experimental Station,based on randomized blocks design,were arranged in order to study the effects of the plant growth regulators and the concentrations of these plant growth regulators on the quantity and weight of the bulblets.The results were as follows: ①Compared with natural propagation coefficient,the artificial propagation coefficient was much higher.The artificial propagation coefficient of Lycoris aurea was up to 21.15,and the treatment "6-BA 500" was best,with propagation coefficient 32.2;The artificial propagation coefficient of Lycoris longituba was 7.93,and the treatment "NAA 250" was best with propagation coefficient 12.9;②NAA and 6-BA both can promote propatation coefficient of L.aurea and L.longituba,and as the concentration of plant growth regulators to increase the propagation coefficient has a corresponding increase.GA3 inhibited the quantity of bulblets.The influence to propagation coefficient of NAA on L.aurea was significantly greater than on L.longituba.③According to these facts: propagation coefficient,the average weight and diameter of the bulblets,the root of the growing conditions,in the experiment,treatment "6-BA300" was the best for Lycoris aurea,and treatment "NAA250" was the best for Lycoris longituba.