不同地理种源麻栎苗期变异和初步选择

Provinance Variation and Preliminary Selection of Quercus acutissima Seedlings

利用13个省(区)的36个种源麻栎种子在安徽省滁州市红琊山林场进行苗期试验,结果表明:不同种源麻栎苗高、根长、地径、高径比、生物量、热值和能量均存在极显著差异。麻栎苗高和地径生长均表现"S"型曲线,7—9月为生长速生期;麻栎不同器官热值大小排序为叶>茎>根,生物量为根>茎>叶,能量为茎>根>叶。主成分分析表明:种源的差异主要是由各器官生物量决定。初步选出安徽太湖、安徽太平、浙江开化、江苏句容、浙江建德、浙江龙泉和贵州榕江种源为优良种源。

Thirty-six seedlots of Quercus acutissima was collected from 13 provinces and the seedling provenances trial was conducted at Hongyashan Forestry Farm in Anhui Province. The results showed that there were significant difference in seedling height, root length, ground diameter, biomass, calorific value and energy. The annual fast growing period of seedling height and ground diameter was from July to September and displayed ＂S＂ growth curve. The calorific value in the components was in the order of leaf 〉 stem 〉 root, sequence of biomass was root 〉 stem 〉 leaf, and energy was stem 〉 root 〉 leaf. Principle component analysis showed that difference of provenances was determined by biomass of different organs. As a preliminary resuh, seven excellent Anhui Taiping, Zhejiang Jiande, Zhejiang Longquan, Zhejiang Kaihua, Jiangshu were selected for the further study. provenances from Anhui Taihu, Jurong and Guizhou Rongjiang