川含笑生态习性及繁育技术研究

目的]研究川含笑（Michelia szechuanica Dandy）的生态习性及其繁育技术。方法]通过对川含笑播种苗、嫁接苗及2年生以上苗木的生长情况观测,研究了川含笑的苗木生长习性及其园林应用。结果]川含笑大田育苗播种量以15～20 g/m2为宜,1年生苗高平均50.2 cm,平均地径0.81 cm。用玉兰（Magnolia denuate）作砧木,切腹法嫁接,1年生嫁接苗成活率达91.2%,平均高（120.32±17.42）cm,地径（1.32±0.08）cm,比实生苗生长快。6年生川含笑平均树高（467.81±26.15）cm,胸径（8.42±0.41）cm,冠径（279.92±26.60）cm。川含笑是一种生长速度快的树种,每年的5～8月是高、径生长最快时期。结论]该研究可以为制定较为科学合理的川含笑育苗方法、栽培技术和园林配置应用等提供参考,便于川含笑这一优良观赏树种的推广利用。

Study on the Ecological Habits and Breeding Technology of M.szechuanica Dandy

Objective]The aim was to study the ecological habits and breeding technology of M.szechuanica Dandy.Method]The growth law of M.szechuanica Dandy was investigated and its garden application was discussed by observing the sowing seedlings,grafting seedlings and the trees above 2-year-old.Result]The result indicated that 15-20 g/m2 was the better quantity for the field sowing.The average height and ground diameter of the annual seedling of M.szechuanica Dandy was 52.2 and 0.81 cm respectively.The survive rate of cut graft seedlings was 91.2% when using the M.szechuanica Dandy as stock plant.The average height and ground diameter of the annual graft seedlings of M.szechuanica Dandy were(120.32±17.42) and(1.32±0.08) cm respectively.The graft seedlings grew faster than sowing seedlings.The average height of 6-year-old seedlings was(467.81±26.15) cm,the diameter at breast height(DBH) was(8.42±0.41) cm and the crown diameter was(279.92±26.60) cm respectively.M.szechuanica Dandy is a fast growing tree specie,it grows fast during the time from May to August every year.Conclusion]The study can provide reference for drawning up scientific and reasonable raising seedling method,cultivation technology and pattern in landscape designing of M.szechuanica Dandy,which is convenient for extend and application of this good ornamental species.