中郁闭度低质白桦林分改造初探.pdfVIP

中郁闭度低质白桦林分改造初探 刘德文 （内蒙古库都尔林业局，内蒙古牙克石 022164 ） 摘要：疏林地补植补造项目是针对低郁闭度的疏林展开的，实践中很多中郁闭度林分因枯、腐、损、劣树木过多， 形成低质低效林分，亟待改造。尤其白桦过伐林分，随采伐次数增加其质量愈加恶化。为把这部分林分改造成针 阔混交、复层异龄、密度合理、结构稳定的高品质健康高效林分，采取扩大伐除枯、腐、损、劣树木范围，保证 留存立木质量优良和腾出栽植空间，因地制宜匹配树种苗木等措施，取得了良好的改造效果。本文对此进行较为 详细的阐述，为健康改造中郁闭度低质低效白桦林分提供一条可行途径。 关键词：中郁闭度；低质林；改造方式；白桦林分 Study on the Improvement of Low-quality White Birch Stands with Moderate Canopy Density LIU Dewen (Kuduer Forestry Bureau of the Inner Mongolia Autonomous Region, Yakeshi, 022164, China) Abstract: Woodland replanting project is aimed at low canopy density woodland expansion project, In practice ，there is plenty of moderate canopy density woodland change into low-quality and low-benefit woodland because of excess it need to be speedily improved. Especially white birch over cutting forest, its quality worsened with the increase of the number of cutting. In order to transform this part of woodland into high quality health woodland of coniferous broad-leaved mixed, multi layer uneven-aged, density reasonable, structure stable, to take such measures that expand the scope of cutting land of dry, rot, loss, bad trees to ensure retained woods have a good quality, and clear planting space, and choose suited tree species according to circumstances, good result has been obtained. This paper carried out a detailed exposition, provides a feasible way for moderate canopy health transformation of low quality and low efficiency of birch forest. Keywords ：moderate canopy density, low quality stands, transformation modes, white birch forest 李勇等对大兴安岭林区低质林成因及改造方式进行了研究[1] 。马宝峰等对大兴安岭林区低质林改培经 营模式的探讨[2] [3] 。纪浩等对大兴安岭低质林改造后土壤肥力综合评