杨树新品种苗期及造林主要生长指标分析与评价

笔者对所引进的品种按定向培育目的和林网化建设选育方向分别对苗期、生长增量、期间生长进行了随机区组差异显著性检验和对比法分析比较,结果表明:苗期差异均显著,造林后2003～2006年树高增量差异不显著,胸径增量差异显著,期间5年后树高和胸径差异均显著,结合对比法进一步分析表明,鲁山杨、中林2025两品种表现最好,同时,以近地侧枝张角和虫害率为参考指标,对表现较好的品种进行了评价,优选出宜林网化品种为中林美荷、林常绿、欧美108,宜定向培育平川造林品种为中林2025,而鲁山杨适宜区域较广。

Analysis and Evaluation on the Major Afforestation Growth Index of New Varieties of Poplar L.in the Seedling Stage

The authors made a significance of difference test among randomized block and comparative analysis on the seedling stage,growth increment according to oriented cultivation and agroforestry construction direction.The results showed that differences among seedling stage were significant,the differences among the height increment of trees were not significant after afforestation during 2003~2006,the differences among diameter increment were significant,and after five years the differences among the height increment of trees were significant.Combined with comparison,the results showed that poplar of Lushan and Zhonglin-2025 were the best.At the same time,the better varieties were evaluated by using collateral inclination and damage rate by pests as reference index.Preferred varieties for appropriate forest networks were Zhonglinmeihe,Linchanglv,euramericana ＂108＂.Varieties suitable for oriented cultivation of plain planting were Zhonglin-2025.While Lushan can be planted in wider area.