摘要
本文以长序榆种子育苗为对象,研究苗木年生长规律。采用有序样本聚类分析法划分苗木的生长时期,拟合了高、径生长的logistic方程,找出苗木高、径及主根生长的最优回归方程,了解苗木各部分生长的相关关系。多元回归分析表明;气温是影响苗木生长的主导因子。
This article studied the annual growth rhythm of Ulmus elongataseedlings. The growth periods were divided for the seedlings by adopting clusteranalyses of ordered samples, the logistic equations were fitted for the growth ofheight and diameter, the optimum regression equation was found for the growthof seedling height, diameter and main root, and the relations of each part growthof the seedlings were known. The multivariate regression analysis revealed thatthe temperature was the main factor influencing the growth of U. elongataseedlings.
出处
《福建林业科技》
1993年第3期8-13,共6页
Journal of Fujian Forestry Science and Technology
关键词
长序榆
苗高
地径
根
榆树
Ulmus elongata
height of seedlings
ground diameter
root
