林地生长数据 Forest Growth Data
图1&2. 林地生长数据
Image 1&2. 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，文冠果分为2009-1与2009-2两块（因树种相同且地块位置、情况相近，以下按往例将2009-1与2009-2地块的数据一并计算，注记为2009文冠果）
In 2009, Poplars were planted on Plot 2009-3 while Yellow horns were planted on Plot 2009-1 in cooperation with the Forestry Bureau in Xianjin Sumu, Kulun Qi, Tongliao. As the two plots, 2009-1 and 2009-2 have the same type of trees and are close to each other, their situations are similar. The sampling results are put together and described as 2009 Yellow Horns in this report. 根据2020年调查结果，2009年林地的文冠果平均存活率为64.77%。文冠果树高始终保持着缓慢的增长，由于文冠果树种本身的树高就有一定的上限，不会生长的很高，两块林地的树高基本位于稳定状态，相差不大。冠幅始终保持增长，增幅不稳定，两块地的平均冠幅数值在2020年度逐渐拉开差距，2009-2的冠幅略大于2009-1。 According to the survey results in 2020, the average survival rate of the yellow horns planted in 2009 was 64.77%. The height kept growing slowly. Yellow horns’ heights are naturally limited, so they could not grow as tall as other types of trees. The tree heights were stable in both two plots. Crown sizes continued to grow, but the speeds of growth were quite different in the tow plots, which contributed to the differences in the average values. The average crown width in 2009-2 plot was bigger than those in 2009-1 plot. 一方面，文冠果的生长有一定的上限，其冠幅受密度限制，两块林地密度几乎相同，冠幅在树行方向受限制；另外一方面，林地树行间依旧进行着间种，农业机械等措施限制了其它方向的冠幅发展。 On one hand, there’s limits in the growth of yellow horns, and their crown sizes were limited by the density of the forest. As the densities in both two plots were almost the same, the tree crowns were all limited in the direction of tree rows. On the other hand, there were inter-planting between tree rows, and thus the interplanting and mechanized farming practices limited the growth of tree crowns in other directions. 总体而言，2009-1的面积更大，数据变化的敏感程度是低于面积更小的2009-2的，冠幅的增长对比，需要继续保持观察。 In conclusion, Plot 2009-1 is larger in total area and less fluctuating in growth data than Plot-2. The differences between the growth speeds of tree crowns in the two plots need to be monitored in the future.林地情况说明 Forest Description
图3. 2009-1（2020年10月30日）
Image 3. 2009-1, taken on October 30, 2019
图4. 2009-2（2020年10月30日）
Image 4. 2009-2, taken on October 30, 2020
