五脉百里香的扦插繁育研究

Shoot Cutting Propagation of Thymus quinquecostatus Celak

为研究扦插基质类型、生根剂使用和枝条部位对五脉百里香扦插苗生根情况的影响,对在不同处理下五脉百里香的生根率、生根数、根长、根质量等进行比较。结果表明,沙土利于其扦插繁育,生根率达67.5%,生根数为3.5条,根长3.20cm;沙土中植株的根长分别是育苗土、田园土的1.27、2.04倍。生根剂处理对扦插苗的根数、根长、根质量均无显著影响。上部枝条扦插后扦插苗的生根率为73.33%,根长为2.99cm,根质量为0.018 8g,显著高于下部枝条(P<0.05)。说明:取上部枝条扦插于沙土是五脉百里香繁育的适宜条件。

In order to study the effect of cutting medium,rooting agent and the different position of shoot on taking root of Thymus quinquecostatus＇ cuttings,the rooting rate,root number,root length and root mass under different treatments were compared.The results showed that the optimal substrate for Thymus quinquecostatus cutting propagation was sandy soil.The average rooting rate in sandy soil can reach 67.5%,the root number was 3.5and the root length was 3.20 cm.The root length of Thymus quinquecostatus in sandy soil were 1.27 times and 2.04 times as much as them in soil for breeding seedling and rural soil respectively.Rooting agent had no effects on root number,root length and root mass.Rooting rate of cutting from the upper part of shoot was 73.33%,the root length and root mass were 2.99 cm and 0.018 8g respectively,which had significant difference with the lower part of shoot.The study demonstrated that it is best to cut the upper part of the shoot and slip into the sand,which would take root much more.