林地生长数据 Forest Growth Data
图1. 林地生长数据
Image 1. Forest growth data
2009年共有三块合作林地，合作方均为库伦旗先进苏木的先进林场，造林树种为杨树与文冠果。2009-3林地因树种全部为杨树在此报告中记为2009杨树。
In 2009, MTP planted trees in three forest sites, and the local partner was Xianjin Sumu Tree Farm in Kulun Qi. The types of trees were poplars and yellow horns. The type of trees in 2009-3 Plot was poplar so it was described as 2009 Popalr in this report.树高均值显著增长。由于保存率持续降低，留存下来的杨树以耐受性更好一点的大树居多，低矮林木的比例较少。但分布范围依旧较广，内部的差异化情况显著。
The average tree height had significantly increased. Due to the continuous decrease in survival rate, the remaining poplars were mostly larger trees with better tolerance, and the proportion of low and short trees was relatively small. But the distribution range was still wide, and the internal differentiation was significant. 杨树的地径和胸径两项指标都表现出稳定的增长趋势。留存的杨树依旧有较大的生长空间。处于快速生长阶段。林地成活率的缓慢下降，也意味着林地苗木的一部分自然死亡，也必然会导致从数据上，树高、地径、胸径均值的提高。而且林地也存在大量内部成活情况以及生长状态的不均质，单一区块的极端数据都会对整体数据均值产生一定程度的影响。 The average basal diameter and diameter at breast height (DBH) of the poplars were both growing stably. The poplars left in the site had large space to grow and still in the rapid growth stage. The overall survival rate was declining, which meant that a portion of the trees dying due to natural causes. This also contributed to the increase of height, basal diameter, diameter at breast height. The unevenness of the survival and growth across the site existed. Any extremity in the data of a single area would affect the overall data.
图2. 树高变化
Image 2. The tree heights over years
图3. 胸径地径数据变化
Image 3. The variation of average basal diameter and DBH
林地情况说明 Forest Description
图4. 林地航拍照片，2023.10.25
Image 4. The aerial photo, October 25th, 2023
图5. 林地航拍照片，2023.10.25
Image 5.The aerial photo, October 25th, 2023
