图1. 林地生长数据
Image 1. Forest growth data
林地保存率非常稳定。从保存率看,林木的保存情况不如同期林地好,但没有发生明显的林木损失。该林地栽植的全部为杨树,杨树是速生树种,生长速度较快。主要体现在树高、地径、胸径等生长指标上。从树高均值变化看,林地依旧在缓慢生长,树高达到一个较高的水平,接近本区域杨树高度的极限。林地地径增长在近三年恢复到了一个正常的缓慢增长的趋势,林地状态相对稳定。胸径测量比例基本稳定,但小幅度下滑,林地生长平稳,没有出现大规模损失。
The forest's preservation rate was very stable. The survival rate was slightly lower compared to other forest sites that were planted in the same year. There was no obvious loss in the tree rows. This plot was planted with poplars. As poplars are fast-growing trees, the fast growth was featured in the indicators such as height, basal diameter, diameter at breast height(DBH) etc. The variation of average tree heights over years showed that the growth of trees was slowing down, and the heights had remained in a high level, approaching the height limit of poplars in this area. The changes of average basal diameter in recent three years were recovered to a normal slow-increasing trend. The status of forest was stabilized. The percentage of measurable DBHs remained stable with a slight decrease. Overall, the forest is well maintained, and there was no large-scale loss of trees.图2. 胸径地径均值变化
Image 2 Basal diameter and DBH of the forest site over years
图3. 胸径测量比例变化
Image 3. The percentage of measurable DBH over years
图4. 林地北侧地块,2023.8.30
Image 4. Northern part of the forest, August 30, 2023
图5. 林地南部地块,2023.8.30
Image 5. Southern part of the forest, August 30, 2023