陕西商洛油松飞播林生长规律及其影响因子分析  

Analysis on the Growth Rhythm and Environmental Impact Factors of Aerially Seeded Pinus tabulaeformis Plantation in Shangluo

作　　者：黄青平[1] 王得祥[1] 刘华 张丽楠[1] 

机构地区：[1]西北农林科技大学林学院,陕西杨陵712100 [2]陕西商南金丝峡管委会,陕西商南726300

出　　处：《西北林学院学报》2013年第1期157-162,共6页Journal of Northwest Forestry University

基　　金：国家林业局林业公益性行业科研专项(200804022B);国家自然科学基金项目(31070570)

摘　　要：在陕西商洛地区30年生油松飞播林设置样地开展林分结构调查,并获取28株解析木,运用WinDENDRO软件进行树干解析,统计分析陕西商洛地区油松飞播林的生长规律及其主要影响因子。结果表明:1)研究区30年生油松飞播林的树高、胸径和材积均值分别为(10.52±0.18)m、(10.99±0.28)cm和(0.061 9±0.001 8)m3;该地区油松树高生长率在20a以后趋于减慢、胸径与材积生长率25a以后趋于减慢。2)海拔、坡位、坡向和林分密度对油松生长产生显著影响,不同立地因子、林分密度条件下,油松生长情况差异显著。其中海拔800～1 000m范围内油松生长表现最好;阴坡、下坡位油松生长情况明显优于其他坡向、坡位;密度则以1 000～1 400株.hm-2适宜。An investigation was conducted on the forest structure in the sampling plots of 30-year-old aeri- ally seeded Pinus tabulaeformis stands. Twenty eight analytic trees were obtained,and analyzed by Wind ENDRO software,ANOVA. Path analysis was applied to obtain the growth rhythm and main environmen- tal impact factors. The results showed that the average values of tree height,DBH,and volume were 10.52 ±0.18 m, 10.99±0. 28 cm and 0. 061 9±0. 001 8 m3, respectively. The growth rate of height declined gradually after 20 years old, and the growth of DBH and volume were also slow down after 25 years. The results also suggested that altitude, slope position and aspect, and stand density influenced the growth sig- nificantly. P. tabulaeformis at 800-1 000 m above sea level grew relatively better than other environmen tal conditions,especially on shady and lower slopes. The optimal density was 1 000 to 1 400 per hectare.

关 键 词：油松 生长规律 飞播林 影响因子 

分 类 号：S791.254[农业科学—林木遗传育种]