摘要
采用固定标准地定位观测和临时标准地调查点面结合的方法,经研究天然杨桦林林分经营密度,对杨桦林各径级株数分布以及胸径与小头直径相关关系的综合分析,得出林分平均胸径和平均树高的生长进程规律及林分最佳经营密度模型,提出了天然杨桦纸浆材用材林定向培育的技术措施。结果表明:采用该项技术,山杨林和白桦林林分单位面积生长量分别可提高14．0％和8．90％。
The management techniques of natural poplar-birch mixed forest were discussed by means of combing located observation in permanent plots and investisation in temporary plots. Through comprehensively analyzing the diameter class distribution, the correlation between the diameter at breast height and the diameter at end, the growth pattern of average diameter at breast height and height, and the best management density model of stands, the management techniques for oriented cultivation of pulp wood for natural poplar-birch mixed forest were put forward. With application of these techniques, the gross productivity of pulp wood in poplar forest and white birch forest increased by 14.0% and 8.90% respectively.
出处
《林业科技开发》
2006年第2期12-16,共5页
China Forestry Science and Technology
基金
国家林业局"天然杨桦林分类定向培育技术的研究(9202303)"国家"十五"科技攻关"林木种质资源保存与创新利用的研究"(2004BA525B10)国家重大基础工作项目"林木种质资源平台标准化整理
整合与共享"(2004DKA30400)资助。
关键词
天然扬桦林
纸浆材
用材林
定向培育
Natural forest, poplar mixed with birch
Pulp wood
Timber stand
Oriented cultivation
