【摘要】 本研究以花梣(Fraxinus ornus)、窄叶梣(Fraxinus angustifolia)及红梣(Fraxinus pennsylvanica)一年生嫁接苗为试材,利用Logistic数学模型对基径和树高生长节律进行拟合,划分生长阶段,使用苗木的生长量与影响苗木生长的气象因子组成的灰色系统,进行关联度分析。结果表明:3种白蜡属树种的一年生嫁接苗基径和树高的Logistic方程拟合效果较好,相关系数(R)均在0. 99以上。不同树种基径和树高的生长阶段均划分为四个时期,即成活期、生长初期、速生期、生长后期,均呈现出"慢-快-慢"的特征。灰色关联度分析表明,总辐射和气温对花梣基径生长影响最大,总辐射对树高生长影响最大;气温对窄叶梣基径生长影响最大,土壤温度对树高生长影响最大;蒸发量对红梣的基径和树高生长影响最大;降雨量对3种白蜡属树种嫁接苗生长影响最小。更多还原

【Abstract】 The one-year-old grafted seedlings of Fraxinus ornus,Fraxinus angustifolia and Fraxinus pennsylvanica were used as test materials,and the Logistic mathematical model was used to fit the growth rhythm of the basal diameter and plant height and divide the growth stage. The correlation analysis was carried out using the gray system composed of the growth of seedlings and the meteorological factors affecting seedling growth. The results were as follows. The Logistic equations of basal diameter and plant height of one-year-old grafted seedlings of the three Fraxinus species were better with the correlation coefficient(R) above 0. 99.The growth of basal diameter and plant height of the three Fraxinus species could be divided into four periods,namely survival period,pre-growth period,fast-growth period and post-growth period,which presents the characteristics of ‘slow-fast-slow’. The grey correlation analysis results showed that the total radiation and air temperature had the greatest influence on the basal diameter of F. ornus,and the total radiation had the greatest influence on the plant height of F. ornus. The air temperature had the greatest influence on the growth of basal diameter of F. angustifolia,and the soil temperature had the greatest influence on the growth of plant height. The evaporation had the greatest influence on the basal diameter and tree height of F. pennsylvania.The rainfall had the least impact on the growth of the three Fraxinus species grafted seedlings.更多还原