黄檀林场杉木林经营密度与产量及形质的关系

按不同土层深度和龄级调查了不同密度的林分,制定了黄檀林场杉木林适宜密度指标。根据这个密度指标,把该场现有林分划分为密、中(适宜密度)、疏3种经营密度林分类型,并分析经营密度与单位面积产量、树干形质的关系。在相同土壤条件下,以适宜密度林分单位面积产量最高,密、疏林分皆次之;林分密度与树干尖削度、节疤面积和秋材比例成反比;林分密度与小径木数量的关系变化不一。

Stand Yield and Stem Tapering in Different Management Densities of Chinese Fir in Huangtan Forest Farm

Chinese fir forests their densities are different were investigated in the depth of soil layer and age class. The favorable density standard of Chinese fir in Huangtan Forest Farm was given. By this standard, the farm's Chinese fir forests could be divided into high, middle and small management classes of density. Under the same condition of soil, the yield of stand with middle density was the greatest. The stand density of Chinese fir was inversely proportional to the stem tapering grade, the knot area and the late wood ratio but differ in the number of undersized log.