摘要
应用多维空间Ｅｎ多向量的理论综合评价方法，对南方型杨树的育苗密度进行综合评价，结果表明，南方型杨树的合理育苗密度为５０ｃｍ×４０ｃｍ，平均苗高可达３．１０ｍ，平均地径２．８ｃｍ，Ⅰ、Ⅱ级苗所占比例６８％．经济效益为２７２３５．５／ｈｍ２。
The method of En dimensional synthetic analysis wad adopted to evalute seedling nursery densityof southern type poplar. The results showed that the reasonable seeding nursery densily of southern type poplarwas 50cm×40cm. The average height could reach 3. 10m, the average diameter of rhizome was 2. 80cm. thepercentage of Ⅰ+ Ⅱ seedlings was 68% and the economic benefit was 27 235. 5 yuan/hm2.
出处
《浙江林业科技》
北大核心
1995年第4期20-23,共4页
Journal of Zhejiang Forestry Science and Technology
基金
宁波市科委科研项目
关键词
南方型
杨树
育苗
密度
综合评价
southern type poplar
reasonable seedling nursery density
synthetic analysis
