白石砬子国家级自然保护区观赏树木多样性及经济价值的研究

经过15a的调查研究，首次报道了白石砬子国家级自然保护区共有观赏树木36科、74属、142种。其中国家级珍稀濒危保护树木11种，占保护区观赏树木种数的7．75％。从观赏特性看：观花类、观果类及观叶类最多，分别占观赏树木种数的45．07％，59．15％，33．80％；从园林用途看：园景树类、盆景类、花灌木类最多，分别占观赏树木种数的49．30％，37．83％，33．10％。69．90％的种类属于北温带分布区类型。优势科主要是蔷薇科、忍冬科和械树科等。文中还介绍了观赏树木其它方面的用途。

Ornamental Tree Sources and Their Diversity and Economic Value in Baishilazi National Nature Reserve

Based on 15-year's investigation,it was found that there were 142 species of ornamental tree species belonging to 74 genera of 36 families,including 11 endangered tree soecies under national protectdion which accounted for 7.75 % of the total tree species in the nature reserve.From the viewpiunts of ornamental characters,the flower plants,fruit plants and foliage plants took the percentages of 45.07 %,59.15 % and 33.80 %of the toral respectively.From the viewpoints of ornamental usage,the plants for garden landscape,potted landscape and shrub bedding took the percentaged of 40.30 %,37.83 % and 33.10 % of the total respectively.Abour 69.90 % of the tree species were of the type of northern temperate distribution zone.The dominant families were Rosaceae,Caprifoliaceae and Aceraceae,etc.Some other applications of ornamental tree species were also introduced.