林地生长数据 Forest Growth Data

图1. 林地生长数据

Image 1. Forest growth data

图2.树高均值变化

Image 2. The average tree height over years

林地保存率相当稳定，保存情况良好。该林地栽植的全部为樟子松，生长速度较慢，生长周期也较长。树高均值依旧保持着相对固定平滑的增长幅度，松树处于快速生长阶段。胸径和地径均值同样保持着较大的增幅。胸径的测量的位置在树干1.3米高度处，苗木达到1.3米高度的比例是影响胸径变化的重要因素。

The preservation rate was kept stable in recent years. The plot was all planted with pines. The growth speed was rather slow and the growth phase would be long. The increasing range of the average tree height remained in relatively fixed and smooth level. The pines were in their fast-growing phase. The increasing range of average basal diameter and diameter at breast height (DBH) remained high. The DBH was measured at the 1.3-meter-high point on the trunk. Reaching the 1.3-meter-height was the key factor for the growth of DBH.

图3.胸径地径变化

Image 3. The variation of average basal diameter and DBH

图4.胸径测量比例变化

Image 4. The percentage of measurable DBH over years

由上图可以看出，树高达到1.3米以上的比例小幅度上升，主要是源于测量样地减少带来的系统误差，整体比例和往年差异不大。樟子松的保存情况逐渐稳定，树高、胸径和地径的增长显著，增幅较大，林地整体为快速增长阶段，但增速差异较大，层次不齐的情况凸显。

It could be seen from the image 3 that the percentage of the trees which reached 1.3 meters had small increasing range, mainly due to the system error caused by the decrease of measurement plots. The percentage had not showed too much difference from other years. The preservation of pines was stable, and increasing range of height, basal diameter and DBH were all significant. The forest was in a fast-growing stage, but the differences in growing speed were also significant. The unevenness of the growth was obvious.

林地情况说明 Forest Description

图5&6&7. 林地航拍和地面图，2023.10.24

Image 5&6&7. Aerial and ground part photos of the forest, October 24, 2023

林地基本不存在间种，松树由于相对低矮，无法大面积遮挡阳光，林地内部的植被也多，松树行下积累了相当厚度的枯枝落叶。

There was no interplanting anymore in the site. As the pines were rather short, which cannot block the sunlight, leading to rich vegetation in the site. Thick layers of dead branches and leaves were cumulated on the bottom of the pines.

林地赞助商列表 Forest Sponsor List