容器规格对乳源木莲移植容器苗生长过程及节律的影响

Effect of Container Size on Growth Process and Rhythm of Manglietia yuyuanensis Containeried Transplanting

以乳源木莲移植容器苗为材料,开展了不同容器规格试验;采用定株观测并应用Logistic方程拟合苗高和地径生长动态的方法,分析容器规格对苗木生长动态与生长节律的影响效应;运用通径分析的方法,揭示苗木生长过程及节律的影响机制。结果表明:容器规格促进生长效应随移栽后时间推移而显现,是个动态过程。容器规格显著影响苗高和地径的线性生长始期、线性生长终期、线性生长速率、最大线性生长速率和线性生长量等生长节律;容器规格显著影响苗高线性生长持续时间。线性生长持续时间和线性生长速率均对苗高、地径生长有着明显促进作用;线性生长速率是影响苗木生长的主导生长节律因子。容器规格影响苗高、地径生长的机制主要是通过改变线性生长速率来实现。

The experiment of transplanting container seedlings of Manglietia yuyuanensis with different container sizes was carried out.The effects of container size on seedling growth dynamics and growth rhythm were analyzed by using the method of fixed plant observation and fitting seedling height and ground diameter growth with Logistic equation,and path analysis was used to reveal the mechanism of seedling growth process and rhythm.The results showed that the effect of container sizes on promoting growth appeared with the time after transplantation,and it is a dynamic process.Container sizes significantly affected the height and ground diameter growth rhythms of M.yuyuanensis seedlings,such as the linear beginning days,the final days,linear growth rate,maximum linear growth rate and total linear growth;container sizes significantly affected the height linear growth duration.Linear growth duration and linear growth rate had significant promotion effects on seedling height and ground diameter growth;linear growth rate was the dominant growth rhythm factor affecting seedling growth.The mechanism of affecting seedling height and ground diameter growth by container sizes is mainly realized by changing linear growth rate.