3种白蜡属树种一年生嫁接苗的生长模型和灰色关联分析

1、3种白蜡属树种一年生嫁接苗的生长模型和灰色关联分析3种白蜡属树种一年生嫁接苗的生长模型和灰色关联分析4942202102-0027-06Abstract 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

2、 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-ye

3、ar-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-grow

4、th 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.

5、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 t

6、he least impact on the growth of the three Fraxinus species grafted seedlings.Keywords Fraxinus ornus L.;Fraxinus angustifolia Vahl;Fraxinus pennsylvanica Marshall;Grafted seedling;Growth model;Gray correlation analysis 白蠟是木犀科梣属Fraxinus植物的统称，我国自然分布的有26种，国外引进8种1， 2。花梣F. ornus L.，原产于欧洲南部、亚洲西南部，常作为观花林木

7、广泛栽培。窄叶梣F. angustifolia Vahl，原产于欧洲中南部、非洲西南部和亚洲西南部，欣赏价值高，常用于行道树和园林欣赏3。白蜡属树种是重要的欣赏和用材树种，自20世纪50年月以来，引自北美的绒毛白蜡F. velutina Torr.、红梣F. pennsylvanica Marshall等树种因具有抗性强、生长速度快等优点，得到了大面积推广，对北方盐碱地区的林业建设起到很好的促进作用，现已是重要的造林树种。近年来，新的白蜡属树种种质资源引进较少，几乎限于停滞状态，重要缘由是欧洲大陆爆发的白蜡枯梢病使活体材料及木材均处于禁运范围4。我国对历年引进的白蜡属树种绒毛白蜡、白梣F. a

8、mericana L.等讨论较多，欧洲白蜡F. excelsior L.、花梣、窄叶梣等原产于欧洲的白蜡属树种报道较少，大多数为试验性栽培5，且多表现不佳，胜利案例较少。生长节律方面，对一年生夏腊梅Sinocalycanthus chinensis6、黄连木Pistacia chinensis7、红椿Toona ciliata8、苦楝Melia azedarach9、枫香Liquidambar formosana10等的播种苗，杨树Populus nigra 11、盐柳1号12等的扦插苗，相思Acacia confusa13、铃铛枣14等的嫁接苗都有讨论，但多数以播种苗为讨论对象，均揭示了一年生苗木生长过程可使用Logistic模型进行模拟，从而得到苗木生长规律。此外，仅针对绒毛白蜡15、水曲柳F. mandshurica16等白蜡属树种进行过生