摘要
通过12年来对油松人工林下层抚育间伐试验地观测,讨论了在不同经营密度下的生长效果。提出了实施间伐的参考技术指标;首次间伐应在17年以前进行,Ⅱ、Ⅲ龄级阶段的最佳经营密度分别为3000～3500株/ha和2500～3000株/ha。在生产中该密度指标可以用来检验间伐设计所确定的经营密度是否合理和可行。
Discusses the growth effect under different management densities of .Pin us tabulaeformis Carr.plantation through 12 years improvement cutting of lower storey. A reference technical criterion for improvement cutting suggested that the first cutting should be carried out before 17 years of age,and the best management densities in Ⅱ and Ⅲ age-class periods were 3000~3500 trees/ha respectively. The density criterions suggested could be used to testify the management density in improvement cutting designed.
出处
《西北林学院学报》
CSCD
1991年第2期44-50,共7页
Journal of Northwest Forestry University
关键词
油松
人工林
抚育
间伐
经营
密度
Pinus tabulaeformis Carr.
plantation
management density
lower storey improvement
growth effect
