摘要
在我国北亚热带江苏南京南郊进行邓恩桉和冈尼桉两个耐寒桉树的引种试验 ,苗期研究结果表明 ,夏雨型种邓恩桉播种后出苗较快 ,3月中旬播种 ,一般 10d开始出苗 ,2 0d时苗木基本出齐 ;冬雨型种冈尼桉播种后出苗较迟 ,一般 2 0d才开始出苗 ,4 0d时苗木基本出齐。两种桉树苗木前期生长较慢 ,10 0d时 ,邓恩桉平均苗高 16 4cm ,冈尼桉仅 5 1cm。邓恩桉于 7月开始速生 ,8月呈现峰值 ,至 11月下旬逐渐停止生长。 1a生苗平均高 1 6 3cm ,最高可达 2 5m。冈尼桉不适应南京地区夏季高温 ,在遮阳网覆盖遮荫降温条件下 ,7月陆续死亡。邓恩桉对低温有一定的适应性 ,在冬季 - 7℃自然低温下 ,仅叶片边缘及少量嫩芽出现轻度寒害 。
Two of the cold resistant eucalytus, Eucalytus dunnii and Eucalytus gunnii were introducted to plant in the surburbs of Nanjing.The seedling stage test results showed that:the seedling of E.dunnii in 10 days and emerged all the seedlings in 20 days after seed sowing in March.The seedling of E.gunnii emerged in 20 days and all the seedlings emerged in 40 days after seed sowing in March.In the early seedling stage these two seedlings grow slowly.In July E.dunnii begin to grow fast.Its growth peak occurred in August.And in November the seedlings stop growing.The average seedling height is 1 63 m.The highest seedling can reach 2 5 m. E.gunnii didnt suitable to the area of Nanjing.And in July it begins to die.However, E.dunnii can endure -7 ℃ in winter.And it grows well. E.dunnii has the extensive introduction potentiality in area of Nanjing,Jiangsu. Authors’ address:Jiangsu Academy of Forestry,Jiangsu Nanjing 211153 China
出处
《江苏林业科技》
2000年第3期7-10,共4页
Journal of Jiangsu Forestry Science & Technology
关键词
邓恩桉
风尼接
引种
苗期生长
耐寒性
Eucalytus dunnii
E.gunnii
Introduction
The seedling stage growth
Cold resistance
