蓝云杉不同品种扦插生根能力和生根特性研究

Rooting Ability and Properties of Different Varieties of Picea pungens Cutting

在甘肃小陇山林业科学研究所苗圃,系统研究了IBA、NAA、ABT对不同蓝云杉品种的扦插生根能力。研究结果表明:蓝云杉插穗愈伤始期为扦插后10 d,插后30 d开始生根,高峰期在插后40 70 d,80 d时扦插生根率达到97%。蓝云杉5个品种间扦插生根率和平均根长差异显著,品种间生根数量存在极显著的差异。插穗处理时间是影响蓝云杉生根率的主导因子。侧枝类型对生根影响差异极显著,一级侧枝生根率达到100%,二级侧枝生根率为88.97%。插穗长度对蓝云杉平均根长的影响差异不显著,但生根数量和根系效果指数存在极显著差异。插穗年龄对生根率的影响差异不显著。蓝云杉扦插的最优配方为,剪取采穗母树上1龄的8 10 cm长的一级侧枝,用IBA100 mg.L-1的浸泡0.5 h。

The cuttings from 3-year-old mother plant of Picea pungens were chosen to investigate their rooting ability and the optimized combination of rooting agent.Besides,the effect of different cutting conditions on the rooting of different varieties of P.pungens was studied systematically.The results showed that the callus formation of P.pungens cutting started at10 days after cutting,and after 30 days they began to root,and the peak period of rooting was 4070 days after cutting,and 80 days after cutting the rooting rate would reach to 97%.There were significant differences among the five P.pungens varieties on rooting rate and average root length,but the difference on the numbers of rooting was statistically significant.The dominant factor influencing the rooting rate was treating time.The effect of lateral branch types on rooting was extremely different.The rooting rate of first order lateral branches reached 100%,and the second lateral branches reached 88.97%.No significant difference was found between the cutting length and rooting rate and average root length,but very significant difference was found between the numbers of rooting and root effect index;the effect of cutting age on rooting had no significant differences.The optimized treatment of hormone concentration for rooting is to immerse the cuttings in 100 mg/L IBA for 0.5 hours with one-year-old 8-10 cm length first order side branches.