生态型林地清理对杉木生长及物种多样性的影响

Influences of the Ground Clearances with Ecological View on Chinese Fir Growth and Diversity of Species

研究了采伐迹地采取生态型林地清理方式对杉木生长及物种多样性的影响。结果表明：1～2a生采取生态型林地清理方式杉木生长小于没采取生态型林地清理方式的对照林分，3a生基本接近，5a生采取生态型林地清理方式的大于对照林分。15a生时采取生态型林地清理方式的林分平均胸径、平均树高和单位蓄积分别是对照林分的110.5％、125.9％和143．1％；采取生态型林地清理方式的林分土壤肥力及物种多样性均比对照林分高。

Influences of the Ecological Ground Clearances （ EGC ） on Chinese fir Growth and diversity of species were studied in this paper. The results were showed that the average tree height, diameter in breast height （DBH）, and volume of the Chinese fir stands treated by EGC was less than that of control stands （ no treated by EGC） respectively when the stand age was 2 years old. However, when the stand age was 5 years old or more, the growth index of stands treated by EGC were greater than the control. When the stands grew up to 15 years, the average DBH, tree height and stock volume of stands treated by EGC was 110. 5% , 125. 9% , and143.1% of the control stands respectively, And the soil fertility and species diversity of stands treated by EGC were also greater than the control.