摘要
以引进的 1 6个黑杨派杨树无性系为材料 ,利用Logistic方程对各个无性系的 1年生扦插苗木的苗高、地径的年生长节律进行拟合 .根据因素数列的几何形状发展态势的接近程度 ,将苗木的生长量与影响苗木生长的气象因子空气温度、空气相对湿度、降水量和日照时数组成一个灰色系统 ,进行面积关联度分析 .结果表明 :利用Logistic方程拟合效果显著 ,相关系数皆在 0 .95 5 1以上 .并以此将无性系扦插苗的生长过程分为成活期、生长前期、速生期和生长后期 4个时期 ,年生长量表现出明显的“慢—快—慢”的节律 ,其中速生期内的苗高生长量占总生长量的比率平均为 6 4 .5 % ,地径生长量占总生长量的比率平均为 6 0 .9% .并对各个生长时期的生长特点进行了分析 ,探讨了苗木的年生长规律 .关联度分析表明空气温度对苗木的高生长影响最大 ,日照时数影响最小 ;而空气相对湿度对苗木的粗生长影响最大 ,降水量影响最小 .通过对苗木年生长节律和影响苗木生长的主要环境因子进行分析 ,为加强苗木生产管理。
Logistic equation was applied to model growth increment of Sect. Aigeiros in Populus at nursery stage. Influence of climatic factors such as air temperature, relative humidity, precipitation and sunshine hours on the seedling growth was analyzed. The results show that the correlation of modeling is significant and all the correlation coefficients are higher than 0.955 1. Based on the equation, annual growth of the seedlings can be divided into four periods, namely survival period, pre growth period, fast growth period and post growth period. Average height and ground diameter in fast growth period is 64.5% and 60.9%of the total annual growth respectively. Growth performance of each period is also described and discussed. Air temperature is believed to have the most significant influence on the height growth and sunshine hours the least whilst relative humidity have the most significant influence on the ground diameter growth and precipitation the least. This paper has provided theoretical basis for the production of high quality poplar seedlings and enhancement of land productivity.
出处
《北京林业大学学报》
CAS
CSCD
北大核心
2004年第2期52-57,共6页
Journal of Beijing Forestry University
基金
山东省科委"杨树新品种的引进
选育和产业化开发"课题资助
关键词
黑杨派
无性系
苗期
LOGISTIC方程
生长模型
灰色关联度
Sect. Aigeiros in Populus, poplar clone, seedling, Logistic equation, growth model, gray correlation analysis
