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于1984～1987年开展了改造杉木低价值林的试验。对10年生杉木林进行平茬萌芽更新与实生苗造林更新对照试验;对10年生杉木林进行施肥与不施肥对照试验。结果都有明显的增产效益:前者4年生树高增加46％,胸径增加36％,后者单位面积蓄积量增加123％。
In 1984 ~ 1987 to carry out the transformation of Chinese fir low-value forest test. Ten-year-old Chinese fir fir stubble sprout regeneration and seedling regeneration comparison test; 10-year-old fir forest fertilization and no fertilization control trial. The results have obvious yield increase: the former 4-year tree height increased 46%, DBH increased 36%, the latter unit area accumulation increased by 123%.