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分析了樟村坪林场6种密度8年生蓝云杉试验林观测数据,研究了不同造林密度对历年生长量的影响。结果表明:3号株行距2m×3m,111株/亩,蓝云杉8年生平均树高比其它5种平均树高提高22.5%、抽稍提高63.1%、地径提高5.3%和冠幅提高18.1%,方差分析初植密度除了对8年生蓝云杉单位面积当年抽生长量有极显著影响外和相关分析树高与抽稍、地径和冠幅生长量有极显著正相关外,对其它生长量的影响均不显著。在鄂西山地营建蓝云杉短周期纸浆用材林应适当密植,初植密度可以达到1665株/hm2,8年生时新梢生长收益最大。
The data of 6-year-old experimental stands of eight-year-old blue spruce forests in Zhangcunping were analyzed. The effects of different planting densities on the annual growth were studied. The results showed that the average tree height of 8-year-old blue spruce trees increased by 22.5%, slightly increased by 63.1%, the ground diameter increased by 5.3% and the crown width increased with the row spacing of 2m × 3m and 111 plants per mu 18.1% .Analysis of ANOVA In addition to the extremely significant effect on the annual growth of spruce blue spruce per unit area in the eight-year-old population, correlation analysis showed that there was a significant positive correlation between tree height, Other growth effects are not significant. Short-period pulpwoods for construction of blue spruce should be properly planted in mountainous areas of western Hubei Province. The initial planting density could reach 1665 plants / hm2, and the highest growth rate occurred in the emerging ones.