林地生长数据 Forest Growth Data
图1&2. 林地生长数据
Image 1&2. Forest growth data
2010年一共有两块合作林地，位于库伦旗六家子镇的三道洼（2010-1）与小南京洼（2010-2），合作方均为库伦旗六家子镇的六家子林场，造林树种为杨树。2010-1由于大规模病虫害，进行了大规模更新采伐，在2021年度进行重新栽植，栽植树种为樟子松和云杉，以樟子松为主，云杉少量混交。2023年度2010林地总保存率为84.69%。
In 2010, MTP planted two forest sites in Sadaowa (Plot 2010-1) and Xiaonanjingwa (Plot 2010-2) in cooperation with the Forestry Bureau in Liujiazi Kulun Qi, Tongliao. Both the two sites were planted with poplars. The plot 2010-1 suffered severe pest and disease outbreak in 2019. The tree farms cut down the trees to prevent the disease from spreading. In 2021, the tree farm replanted in the site with pines and spruces. Pines were the main tree types, and some spruces were planted in-between to mix with the pines. The survival rate of all the forest sites planted in 2010 was 84.69% in 2023.
图3. 树高变化
Image 3. The average tree heights over years
图4. 地径生长数据
Image 4. The basal diameters over years
林地初植期，樟子松和云杉采用了3-4年生的小苗木栽植，相对低矮，树高、地径等指标较小，且相对容易受到农业间种的影响。由于采用的是幼苗，两个树种的树高都较小。樟子松的树高均值缓慢上升，云杉树高在第三年重新上升，两种苗木的生长情况逐渐平稳。初植期，松树苗木较低矮，是没有达到1.3米胸径测量标准的。只有地径指标数值。两个树种的地径均值均增长，说明苗木依旧保持增长。
In the initial planting phase, the 3-to-4-year-old saplings of pines and spruces were used for planting. The saplings were small, so the indicators including height, basal diameter etc. were small. And the saplings could easily be affected by interplanting. As the saplings were small, and tree heights of both two types were low. The average height of pines increased slowly, while the height of spruces rose again in the third year, and the growth of the two types of trees gradually stabilized. As the trees were planted not long ago, there was none of them reaching the 1.3-meter-high standard for measuring DBH. There were basal diameter values available only. The average basal diameters of the two were increasing, which meant that trees continued growing. 由此可知，苗木的树高降低，主要受间种影响，其中农作物的间种导致苗木被翻耕的覆土掩埋了一部分树干，导致树高的绝对值降低。 From this, it could be seen that the decrease in tree height was mainly affected by intercropping. The intercropping of crops led to a part of the tree trunk being buried by the soil cover of plowing, resulting in a decrease in the absolute value of tree height.林地情况说明 Forest Description
图5&6. 林地照片，2023.10.22
Image 5&6. The forest photos, October 22th, 2023
林地内间种了高杆的玉米，大部分区域保留了恰当的间距，少部分区域和树行混合，间种农作物对苗木遮盖的情况较普遍，春季翻耕导致苗木部分枝条被覆盖的现象普遍。林地后续的生长情况需要继续观察。
High corns were interplanted in the forest sites. Most tree lines have enough spaces in-between. But in a few areas, corns were planted in the tree lines, and the corns thus affected the sun exposure that the trees got. The plowing in the spring caused that part of the branches were covered. Further observation is needed to monitor the preservation of the forest.
