基质和生长激素对地果硬枝扦插生根的影响

Effects of Substrate and Growth Hormone on Hardwood Cutting Propagation of Ficus tikoua

研究扦插基质、生长激素种类及浓度对地果插穗生根率、生根数、根长、单株根系干质量、生根指数等的影响,确定影响地果硬枝扦插的主要因素及最佳扦插组合,可为地果扦插繁殖提供科学依据。结果表明,不同基质对地果插穗生根率存在显著影响,以腐殖质土生根率最高(90.42%),以黄土基质最低(71.78%),且不同生长激素间地果生根率无显著差异。基质差异对地果扦插根系的平均最大根长、平均根长、单株根系生物量、生根指数均产生明显影响,表现为腐殖质土>黄土>河沙。不同激素处理地果的平均生根数排序为生根粉>500 mg/L萘乙酸>200 mg/L萘乙酸>50 mg/L萘乙酸>无激素,生根指数为500 mg/L萘乙酸>200 mg/L萘乙酸>生根粉>50 mg/L萘乙酸>无激素,而激素差异对平均最大根长、平均根长和单株根系生物量影响不显著。地果硬枝扦插生根效果最好的组合为腐殖质土+200 mg/L萘乙酸,其生根率达91.67%,根系发育最好。

In this study,we planted hardwood cutting of Ficus tikoua in different soil substrate and with different types and concentrations of growth hormones,and we measured the rooting rate,rooting number,root length and root dry mass per plant,and calculated the rooting rate in each treatment.The results showed that the rooting rate of F.tikoua was significantly affected by substrate treatments but not growth hormone type.The rooting rate was highest(90.42%)in humus soil substrate while lowest(71.78%)in loess substrate.The average maximum root length,average root length,root biomass per plant and rooting index of cuttage roots were significantly affected by substrate,showing a same trend humus soil>loess>river sand.The average rooting number of F.tikoua under different hormone treatments was rhizogenic powder>500 mg/L NAA>200 mg/L NAA>50 mg/L NAA>no hormone,rooting index was 500 mg/L NAA>200 mg/L NAA>rhizogenic powder>50 mg/L NAA>no hormone.However,hormone differences had no significant effect on average maximum root length,average root length and root biomass per plant.The combination of humus soil and 200 mg/L NAA was determined to be the optimal method for hardwood cutting of F.tikoua,the rooting rate and the root development were the best.