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.
图3. 文冠果树高均值变化
Image 3. The average tree height over years
图4. 文冠果冠幅均值变化
Image 4. The average crown width over years
根据2023年调查结果，2009年林地的文冠果平均存活率为53.64%，保存率下降较明显。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。冠幅开始下降，2009-2的冠幅略大于2009-1。
According to the survey results in 2023, the average survival rate of the yellow horns planted in 2009 was decreased significantly to 53.64%. 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 began to decrease. 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5. 2009-1，2023.10.26
Image 5. 2009-1, October 26, 2023
2009-1林地间种的种类较多，有低矮的小米和豇豆，也有高杆的玉米。树行的杂草覆盖较厚，树行间的部分由于翻耕等农业措施依旧裸露地表，枝条折断的情况较常见。
The crops interplanted in Plot 2009-1 varied in types, including short millet and cowpeas, and taller crops such as corns. There covered layers of weeds in the tree rows, and there were exposed land surface and broken branches in some parts between tree lows due to farming practices such as plowing.
图6. 2009-2，2023.10.26
Image 6. 2009-2, October 26, 2023
2009-2全部间种的为玉米，枝条折断的情况和土壤裸露的情况较普遍，树根部有较厚的枯落物积累。
The above picture showed that all the crops interplanted in Plot 2009-2 were corns. The broken branches and exposed land surface were found quietly a lot in the plot. There were many layers of dead leaves and plants at the bottom of trees.
林地赞助商列表 Forest Sponsor List
