辽宁省章古台樟子松固沙林更新的研究

章古台樟子松固沙林 ,是建国初期在东北西部与内蒙古东部防护林工程建设中营造的试验示范林。樟子松固沙林发挥了显著的生态效应与经济效应 ,它改善了沙地土壤与小气候条件 ;樟子松林的生物产量比较高 ,为 2 .7～ 3.4t/ (hm2 ·a)。樟子松固沙林提早更新的原因 ,主要由于引种地区跨越的纬度大 ,土壤气候条件差异大 ,引起树木自身生育规律的变化 ,生育期提前且缩短。另外 ,由于营造单纯林 ,林分密度高 ,水分亏缺 ,以及感染枯梢病等 ,使生育期更加缩短 ,章古台樟子松更新的林龄为 4 0～ 4 5a。更新的目标是 ,营造结构合理且稳定性比较高的乔灌草型、利用与治理相结合的新模式林

Study on early regeneration of Mongolian pine sand-fixation plantation in Zhanggutai

Mongolian pine plantations were planted as protection forests in east of inner Mongolian autonomous region in 1950s.The forest had served its purpose with high ecological and economical effects for its high biomass by improving soil fertility and microclimate.The reason why the plant is mature early is because of the huge difference between the place it introduced from and place where it was planted.Different climate and soil conditions lead to a different growing rule for the tree.Additional,the high density of the pure stand and the disease also shorten the maturity period.For such kind of plantation,a new regeneration model is stereo forest with arbor,shrub and grass which was good for both utilization and control.