日本落叶松家系对比试验分析
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摘 要: 以日本落叶松家系試验林为对象,通过对造林3 a后的保存率和生长量调查分析,比较不同家系的早期表现,并开展优良家系初步选择。%,家系间生长量均存在极显著差异,保存率和生长量最好的是种子园家系246号,其次分别为24、299、240号;种子园家系的生长表现略好于母树林对照,但二者差异不大,需要成林后再进行比较分析。
关键词: 日本落叶松;家系;生长对比
中图分类号: 文献标识码:A 文章编号:1004-3020(2020)04-0025-04
Abstract: Through the survival rate and growth after three years investigation and analysis, the different family's early performance was compared and superior families were selected preliminary in Larix kaempferi family experimental forest. The results showed that the average survival rate was % and growth were extremely significant differences between families. The best family of the seed orchard in survival rate and growth was no. 246, next was no. 24, 299, 240 respectively. The growth of the seed orchard family was slightly better than that of seed, but the difference is small. A further comparison will be needed after the stand grew up.
Key words: Larix kaempferi;family;growth comparison
日本落叶松Larix kaempfer属松科落叶乔木[1],原产日本,分布在日本本州中部地区和关东地区。1909年左右首先引入山东省费县塔山林场,目前主要分布在东北地区,河北、河南、山东、湖北、江西、四川等省区也有栽培。由于其速生、材质好、抗性强、适应性广而在中国北方地区以及南方亚高山区大面积推广[2~4]。因此其引种栽培,不仅对中国森林木材的供应,城市绿化等方面有重大影响,而且具有较高的生态价值。
,用母树林混合种子作对照,分析了家
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