Abstract: In order to improve the survival rate of Forsythia suspensa cuttings and ensure the quality of seedlings, this paper studied the effects of cutting type and cutting diameter on the rooting. The results showed that the rooting rate of Forsythia suspensa stabilized after two months. And the rooting rate of bearing shoots was higher than vegetative shoots. The order of rooting rates of vegetative shoots and bearing shoots in different diameters were all fine> middle> thick, and the total root number of cuttings in different specifications decreased in order of T2 (middle vegetative shoot), T4 (thick bearing shoot), T1 (thick vegetative shoot), T6 (fine bearing shoot ), T5 (middle bearing shoot ), T3 (fine vegetative shoot ). While the order of the length of the longest adventitious root of cuttings in different specifications was T3>T5>T4>T2>T6>T1, and the order of the diameter of the longest adventitious root of cuttings in different specifications was T6=T3>T5=T4=T2>T1, which indicated cutting type had sigmificant effect on rooting of Forsythia suspensa.

Key words: Forsythia suspensa, cutting, vegetative shoot, bearing shoot, diameter

摘要： 为提高连翘扦插成活率，保证苗木质量，研究了插穗类型（营养枝、结果枝）和插穗直径对连翘扦插生根的影响，结果表明：连翘扦插苗成活率在扦插后一个半月左右稳定，连翘结果枝的成活率明显高于营养枝。不同直径的营养枝和结果枝扦插苗成活率都表现为：细>中>粗；不同规格插穗扦插生根的不定根总数顺序为：T2（中营养枝）> T4（粗结果枝）> T1（粗营养枝）> T6（细结果枝）> T5（中结果枝）> T3（细营养枝）；不同规格插穗扦插生根的最长不定根长顺序为：T3>T5>T4>T2>T6>T1；不同规格插穗扦插生根的最长不定根粗顺序为：T6=T3>T5=T4=T2>T1，表明插穗类型对连翘育苗影响显著。

关键词: 连翘, 扦插, 营养枝, 结果枝, 直径