泰山椴扦插繁殖技术研究

为了给泰山椴的保护和快速繁育提供理论依据，笔者研究了插条不同部位（上、中、下）、不同插穗类型以及不同激素种类(IBA、NAA、TBT)和浓度(500、1500、3000、5000 mg/L)对泰山椴扦插生根的影响。结果表明：插条中段的插穗生根效果最好，其生根率为45.6%，上段为39.7%，下段为35.2%；不同插穗类型对泰山椴扦插生根影响显著，其中8月上旬时的半木质化嫩枝生根率为52.3%，是9月中旬木质化硬枝的1.1倍；不同激素和浓度处理对泰山椴扦插生根影响显著，其中以IBA 3000 mg/L生根效果最好，其生根率为68.5%，平均根数为18.6条，平均根长为12.35 cm，分别是对照的2.6倍、1.4倍、1.2倍。泰山椴扦插宜选用半木质化枝条的中段为插穗，经IBA 3000 mg/L溶液处理效果最佳。

Study on Cutting Propagation of Tilia taishanensis S. B. Ling

The paper aims to provide the theoretical basis for protection and rapid propagation of Tilia taishanensis S. B. Ling. The effect of different parts (upper, middle and lower), types of cuttings and different hormones (IBA, NAA and ABT) and their concentrations (500, 1500, 3000, 5000mg/L) on the cutting rooting of Tilia taishanensis S. B. Ling was researched. The results indicated that cuttings in the middle had the best rotting effect, which had a rooting rate of 45.6%. The rooting rate of the upper was 39.7% and that of the lower was 35.2%. Different cuttings significantly affected their rooting capacity. The rooting rate of shoot in early August was 52.3%, 1.1 times of the hardwood in mid-September. The types and concentrations of growth regulators were also important factors that affected cutting rooting. Treated with IBA at a concentration of 3000 mg/L, the cuttings had a rooting rate of 68.5%, an average root number of 18.6 and an average root length of 12.35 cm, which were 2.6 times, 1.4 times and 1.2 times of that of the control respectively. The middle cuttings shortly dipped with 3000 mg/L IBA were appropriate for the cutting rooting of Tilia taishanensis S. B. Ling.