鹅掌楸实生苗生长规律研究

对河南大别山引种鹅掌楸1年生播种苗苗高、地径的年生长变化研究表明,苗高、地径的生长规律符合“S”型生长曲线,可用Logistic方程来拟合;采用有序样本聚类分析法划分苗木的生长时期,把生长期划分为4个阶段,即出苗期(5月14日以前)、生长初期(5月15日~7月14日)、生长盛期(7月15日~9月12日)和生长后期(9月13日~11月11日);其中,生长盛期的生长量占年生长量的68.28%。并拟合了苗高、地径生长的回归方程。

Study on growth pattern of Liriodendron chinese seedlings

The growth law of height and ground diameter of one-year-old seedlings of Liriodendron chinese in Dabei Mountain Henan was studied in this paper.The result indicated that growth patterns of height and ground diameter could be fitted by 'S' curve and could be simulated with Logistic equation.The four growth periods were divided for the seedlings by using the cluster analysis of series samples: emergence phase of seedlings(before May 14 th),initiation phase of seedling growth(from May 15 th to July 14 th,prosperous phase of seedling growth(from July 15 th to September 12 th) and later phase of seedling growth(from September 13 th to November 11 th).The production of prosperity period was about 68.28% of biomass in whole year.The regression equation was worked out for the growth of seedling height and at ground diameter.