【摘要】 采用走访和实地调查方法,对沾益区古树资源的种类构成、区系分布类型、结构特征、分布情况和生长状况进行分析。结果显示,沾益区共有古树及古树后续资源314株,隶属27科37属47种,种类丰富且数量较多,主要以漆树科、壳斗科、榆科、蔷薇科、松科和豆科6个优势科和黄连木、四蕊朴、麻栎、豆梨和滇油杉等乡土树种为主;古树属的区系具有明显的中亚热带性质,且具有热带向温带过渡的特点。树龄主要集中在100~200 a,平均树龄170.6 a;生长旺盛(Ⅰ级)、良好(Ⅱ级)、一般(Ⅲ级)、较差(Ⅳ级)、极差(Ⅴ级)的古树分别有181、7、113、12和1株,分别占古树总株数的57.64%、2.23%、35.99%、3.82%和0.32%。针对目前古树保护中存在的生长环境差,病虫危害严重,缺少管理与技术支持等问题,提出相应的保护管理对策。更多还原

【Abstract】 The species composition,floristic types,structure characteristics,distribution and growth status of ancient tree resources in Zhanyi District were analyzed by interviewing and field investigation. The results showed that there were 314 ancient trees and subsequent resources of ancient trees in Zhanyi,belonging to 47 species,37 genera and 27 families. The species of ancient trees mainly included the six dominant families of Anacardiaceae,Fagaceae,Ulmaceae,Rosaceae,Pinaceae and Leguminosae as well as the local species of Pistacia chinensis,Celtis tetrandra,Quercus acutissima,Pyrus calleryana and Keteleeria evelyniana. The floristic distribution of the genera characterized by the obvious subtropical nature presented the transition from the tropics to the temperate zone. The age of ancient trees was mainly100 ~ 200 a with an average age of 170. 6 a. The amount of ancient trees in growth grades of vigorous( Ⅰgrade),good( Ⅱgrade),general( Ⅲ grade),poor( Ⅳgrade),poorest( Ⅴgrade) were 181,7,113,12 and 1 respectively,accounting for 57. 64%,2. 23%,35. 99%,2. 23% and 35. 99% of the total ancient trees. The protection and management measures for ancient trees were proposed to solve the problems of poor growth environment,serious disease and insect damage,inadequate management and insufficient technical support.更多还原