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本文用典型分析方法研究了浙江湖州不同立地条件下杉木胸径、树高和材积的生长过程特征。在目前的栽植密度范围内,立地条件愈好,该边缘产区的杉木生长冲劲愈大,各生长指标的连年生长量高峰出现愈早,持续时间相应愈长,具有典型的“冲劲大,后劲小”的特点。而立地较差的林分,连年生长量高峰不明显,其平均生长量基本处于低水平的缓慢增长状态。用有序样本聚类法进行了杉木胸径、树高和材积的生长阶段划分。结果表明该3个生长指标均可分为4个生长阶段,即幼树阶段、速生阶段、干材阶段和滞长阶段。
In this paper, the characteristics of growth process of Chinese fir diameter, tree height and volume under different habitats in Huzhou, Zhejiang Province were studied by means of a typical analysis method. In the current planting density range, the better the site condition, the larger the fir plant growth momentum in the marginal area, and the earlier the annual growth peak of each growth index appears, the longer the duration, with the typical “big momentum and stamina Small ”features. The stand on the poorer stand, perennial growth peak is not obvious, the average growth of basic low level of slow growth. The order of cluster analysis was used to divide the growth stages of Chinese fir diameter, tree height and volume. The results showed that the three growth indexes could be divided into four growth stages, that is, sapling stage, fast growing stage, dry wood stage and stagnant growth stage.