天然杨桦工业纤维林优质高效经营技术

High Quality and Efficient Management Techniques of Natural Forest of Poplar Mixed with Birch for Industrial Fibre Plantation

采取固定标准地连续、定位观测与临时标准地调查点面结合的方法,在研究立地分类、林分生长进程、最适经营密度选择及密度控制技术的基础上,深入系统地分析了林木干材心腐影响因子、种群结构及优质高效经营效果,结合工业纤维林培育目标及木材纤维物理材性指标测定,提出了天然杨桦工业纤维林优质高效经营技术,可为科学合理地经营现存杨桦次生林提供理论依据.结果表明：采取优质高效经营技术,山杨和白桦工业纤维林单位面积总产量分别提高14.01%、8.90%,经营效果明显,极具广泛推广应用前景.

Combined continuous and oriented observation of permanent sample plots with investigation of temporary sample plots,on the base of size classification of Poplar and Birch natural forests,the growth process,and the techniques of suitable density election and control,we studied the effect factors of heart rot to trunk wood,the size structure of population,and the high quality and efficient management.According to the cultivating aim of the industrial fibre plantation and the physical and chemical characters of the wood,we concluded the high quality and efficient management techniques of natural forests of Popular mixed with Birch for industrial fibre plantation.Results of this study can provide a theoretical basis for the directive cultivation of secondary popular-birch forests.With application of the techniques,the gross production of industrial fibre plantation in popular forest and white birch forest increased by 14.01% and 8.90% respectively.