摘要
对台湾峦大杉引种造林密度试验研究结果表明,在造林密度2 500～3 500株/hm2范围,适当密植有利于提高峦大杉造林保存率;造林后1～2a,峦大杉高径生长低于本地杉木,差异达显著水平,3a生峦大杉高径生长与杉木接近,6a生林分峦大杉生长势超过杉木,说明其有良好生长潜力;不同造林密度对峦大杉树高生长期、单株材积生长影响不显著,但对胸径、冠幅生长及林分蓄积量影响达极显著水平,即较低密度栽植有利于峦大杉胸径与冠幅生长;峦大杉冠幅面积与胸径最优的模型为C=-1.5181+0.5664D,并制定出峦大杉人工林合理经营密度,以供生产实际参考。
The research was conducted to the different afforestation density effect of Taiwan Cunninghamia konishii, the result shows that with the scope of affectation density of 2500 - 3500 trees/hm^2, proper thick planting will be benefit for the improvement of survival rate of Taiwan Cunninghamia konishii. After 1 - 2a afforestation, the height and diameter growth of Taiwan Cunninghamia konishii is lower than local firs with the obvious difference. After 3a, the growth is near to local firs, while after 6a the growth of Taiwan Cunninghamia konishii is higher than that of the local firs that means the Taiwan Cunninghamia konishii has the good growth potential. Different afforestation densities have indistinctive impact on the individual volume growth within the height growth period, while have extreme obvious impact to the growth of dbh and canopy breadth and stand volume. Lower density planting will be in favor of the growth of dbh and canopy breadth of Taiwan Cunninghamia konishii. The optimal model for the canopy breadth area and dbh of Taiwan Cunninghamia konishii is C = - 1.5181 ＋ 0. 5664D, based on this model, it is designed the appropriate operation density of the artificial forest for reference in the actual production.
出处
《亚热带水土保持》
2011年第4期28-31,共4页
Subtropical Soil and Water Conservation
关键词
台湾峦大杉
引种
造林
合理密度
Taiwan Cunninghamia konishii, introduction, afforestation, appropriate density
