喜树不同育苗方式的生长特性及培育技术研究

Study on Growth Characteristics and Breeding Technique of Camptotheca acuminate in Different Seedling Methods

通过采用不同育苗方式对喜树苗木的物候期和高生长进行观测,结果表明:3种不同育苗方式对苗高生长有极显著的影响,其中营养袋方式培育苗木优于苗床育苗;根据生长过程划分为出苗期(34d)、生长初期(60d)、生长盛期(120d)和衰退期(60d)等4个时期,苗高生长有明显的"慢—快—慢"的生长节律;采用Rich-ards函数可以很好地精确定量化描述1a生苗高生长过程,拟合精度检验性好,可应用于生产实际;最后总结了喜树苗木培育及管理技术。

Through observations to the phenology and height growth characteristics in different seedling meth-ods,annual growth law and period of Camptotheca acuminate were studied.Result shows that three kinds of different seedling methods on the height growth all reach the significant level,container seedling was better than seedbed seedling;According to the growth process could be divided into seedling stage（34d）,initial stage（60d）,Growth stage（120d） and recession stage（60d） four stages,annual growth period for tree height of seedlings shows rhythm of slow-fast-slow after seed sowing;The fitting accuracy of Richards function could describe annual height growth process in quantification,it can be applied to actual production;Final-ly,the breeding and management techniques of Camptotheca acuminate are summarized.