2种石山苣苔属植物叶插繁育研究

以河池石山苣苔Petrocodon hechiensis (Y.G.Wei,Yan LiuF.Wen) Y.G.WeiMich.M?ller、靖西石山苣苔Pet. jingxiensis (Yan Liu,H.S.GaoW.B.Xu) A.WeberMich.M?ller这2种石山苣苔属植物的叶片为试验材料,在不同基质上进行扦插繁育,并对3种基质组合的扦插效果进行对比分析,比较各扦插基质的优劣,筛选高效的扦插繁育方法。结果表明,在喷施0.2%多菌灵并对插穗经100 mg/L IAA溶液浸泡1 h后,采用水苔作为扦插基质时,2种石山苣苔属植物扦插生根情况较好,生根率也最高(河池石山苣苔为59%,靖西石山苣苔为62%),但出芽阶段会由于营养不良导致部分插穗出现死亡的现象;而采用水苔+蛭石+珍珠岩+泥炭土(体积比0.5∶1∶1∶1)为基质时,插穗成苗率较高(河池石山苣苔为50%,靖西石山苣苔为60%)。可见,河池石山苣苔与靖西石山苣苔的叶插繁殖可以将水苔作为生根基质,待插穗出芽后,以水苔+蛭石+珍珠岩+泥炭土(体积比0.5∶1∶1∶1)作为移栽基质,可获得较好的成苗效果。

Study on Leaf Cutting and Breeding of 2 Petrcodon Species

The leaves of Petrocodon hechiensis (Y.G.Wei,Yan Liu & F.Wen) Y.G.Wei & Mich.Möller and Pet. jingxiensis (Yan Liu,H.S.Gao & W.B.Xu) A.Weber & Mich.Möller were used as experimental materials to carry out cutting propagation on different substrates,and the cutting effects of the three matrix combinations were compared and analyzed. The advantages and disadvantages of each cutting matrix were analyzed,and the efficient cutting propagation method was screened. The results showed that when 0.2% carbendazim was sprayed and the cuttings were immersed in 100 mg/L IAA solution for 1 h and the sphagnum moss was used as the cutting substrate, the rooting of the two species of the genus Petrcodon Hance was better,and the rooting rate was also the highest (59% in Petrocodon hechiensis,and 62% in Petrocodon jingxiensis),but some of the cuttings will die due to nutritional deficiency during the budding stage. When using sphagnum moss + vermiculite + perlite + peat soil (volume ratio 0.5:1:1:1) as the substrate,the seedling rate of cuttings was higher (50% for Petrocodon hechiensis and 60% for Petrocodon jingxiensis). It can be seen that the sphagnum moss can be used as the rooting substrate, and after the sprouting of the cuttings,the mulberry + vermiculite + perlite + peat soil (volume ratio 0.5:1:1:1) is used as the transplanting substrate,a better seedling effect can be obtained.