不同立地因子对杉木蓄积量的影响

The influence of different site factors on Chinese fir volume

以湖南省杉木(Cunninghamia lanceolata(Lamb.)Hook)人工林为研究对象,研究了立地因子对林分蓄积量的影响。于湖南省衡山县、桃源县、苏仙区、金洞区、遂宁县、新邵县、泸溪县、岳阳县等8处不同地区中布设了26块杉木中龄林标准地,调查了每块标准地的地貌类型、海拔、坡度、坡位、坡向等立地因子以及年龄、郁闭度、林分优势平均高、林分平均胸径等测树因子,采用统计之林软件中数量化方法Ⅰ模块分析了上述因子对公顷蓄积量的影响显著性程度,找出对杉木林分蓄积量有影响的主导立地因子及不同立地因子对蓄积量的影响显著性差异。建立了湖南省杉木人工林林分蓄积量预估模型,为科学营林提供理论依据和参考。

In this paper, the Chinese fir plantation in Hunan Province was studied, and the influence of site factors on stand volume was studied. In Hunan province eight different areas in setting standards for 26 pieces of Chinese fir mid-maturation forest land,the site factors and the tree factors were investigated for each standard site,use Quantification methods Ⅰ module in forstat software analysis the effect of the above factors on ha volume significant degree, find the leading site factors which have influence on Chinese fir stand volume and different site factor on the influence of the volume difference. The forecasting model of stand biomass of Chinese fir plantation in Hunan Province was established,which provide the theoretical basis and the reference of forestry science.