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。
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.杨树林地总体保存率在缓慢下降，下降幅度略增。树高均值缓慢增长，和其它杨树林地相对，树高偏低，增速也偏低。为了更清晰的判断林地情况，将林地树高值每0.5米为一个高阶进行归类汇总如下：
The overall survival rate of poplars was decreasing slowly, but slightly quickly than before. The average height kept growing. But the poplars in 2009-3 plot were lower compared to the poplars in other forest sites. The growing speed was also rather slow as well. To understand the forest site’s situations, the below chart categorized the distribution of poplar heights as every block representing 0.5 m.
图2. 树高分布
Image 2. Distribution of Tree Heights Data
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 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.林地情况说明 Forest Description
图3. 地面拍摄（2020年10月31日）
Image 3. Ground photo, October 31st. 2020
图4. 地面拍摄（2020年10月31日）
Image 4. Ground photo, October 31st. 2020
