2026年7月9日-7月16日，百万植树计划内蒙古夏季林地调查活动如期开展，三位志愿者与百万植树计划工作人员在一周的时间内完成了对位于内蒙古通辽市2010-2012年的中龄林地的走访调查，共调查4块林地、10个样点约400棵树的数据，同时采集树芯约30份、标本约60份。
From July 9 to 16, 2026, the Million Tree Project (MTP) conducted its summer forest survey in Inner Mongolia. Over the course of one week, three volunteers joined MTP staff in surveying four plots of middle-aged forests planted between 2010 and 2012 in Tongliao. Together, we measured about 400 trees in 10 sample sites, collected 30 tree cores and prepared 60 plant specimens.
志愿者在进行林地调查 王凯摄
Volunteers conducting on-site forest surveys. Photo by Kai Wang
林地调查的主要工作内容就是活立木调查，一般需测量树高、胸径、地径、冠幅等重要数据，可以清楚地了解到林地树木生长状态。林地经过多年的持续监测，主要指标均已达到稳定状态进入成熟期，持续的枯枝落叶等养分积累使得沙化状态显著改善。
The team’s primary task was to measure tree growth, including tree height, diameter at breast height (DBH), basal diameter, and crown width to evaluate tree growth status. Years of continuous monitoring show that these indicators have become increasingly stable, suggesting that the forests have entered a mature stage. The accumulation of fallen leaves and other organic matter has also significantly improved the soil conditions.
志愿者在测量树高 郭珈源摄
Volunteers measuring the tree height. Photo by Jiayuan Guo
志愿者在测量冠幅 郭珈源摄
Volunteers measuring the crown width. Photo by Jiayuan Guo
林地中深厚的枯枝落叶 郭珈源摄
Layers of fallen leaves on the forest floor. Photo by Jiayuan Guo
与往年不同的是，“气候变化”彻底地影响了今年的调查计划，去年同期的志愿者不得不忍受的持续高温晴热天气在今年完全反转为持续性的阴雨天气。在天气条件较差时，调查小队将工作移至室内，从事标本制作和树芯研磨等工作。
Unlike previous years, this year’s survey schedule was significantly affected by unusual weather conditions associated with climate change. The hot, dry conditions experienced by volunteers last year were replaced by persistent rainfall throughout this year’s survey period. During the rainy days, the team shifted their work indoors, preparing plant specimens and polishing tree cores.
林地道路因降水频繁积水明显 郭珈源摄
Waterlogged forest roads, Photo by Jiayuan Guo
研磨树芯 志愿者-宋嘉闻摄
Polishing tree cores. Photo by Jiawen Song
刚压好的植物标本 志愿者-宋嘉闻摄
Plant specimen. Photo by Jiawen Song
终于在活动结束时，雨过天晴，感谢志愿者们对于林地调查工作的支持与付出！在度过这特别的短暂夏日后，也许志愿者不久就会怀念起属于内蒙古的独特清凉。
Fortunately, the rain cleared and the sun came out on the final day. We extend our heartful thanks to all of our volunteers for their dedication and hard work! We hope the cool summer days spent in Inner Mongolia will remain a cherished memory for everyone who took part.
志愿者合影 龙飞扬摄
Group photo. Photo by Fia Long