Gao Jia-Ni, Yang Bao, Qin Chun
Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000.
University of Chinese Academy of Sciences, Beijing 100049.
Ying Yong Sheng Tai Xue Bao. 2021 Oct;32(10):3505-3511. doi: 10.13287/j.1001-9332.202110.015.
The stem radius growth of was monitored by dendrometer during the growing season in 2017 and 2018 at two altitudes (2010 and 2330 m) in the Helan Mountains. We investigated the responses of tree radial growth to drought events. The results showed that drought event in June 2018 reduced stem growth rate of . The precipitation in July and August reactivated the stem radius growth. The main growing season of stem was June-August in 2018, which was a month longer than that in 2017. The response patterns between stem radial growth of and climatic factors were consistent across forest stands in different altitudes. Drought in the early growing season suppressed the radial growth of trees, while precipitation in the mid- and late growing seasons played an important role in promoting the radial growth of trees. The effects of climatic factors in August on tree-ring width should be considered during climate reconstruction in this region.
2017年和2018年生长季期间，利用测树仪在贺兰山两个海拔高度（2010米和2330米）监测了[树木名称]的树干半径生长情况。我们研究了树木径向生长对干旱事件的响应。结果表明，2018年6月的干旱事件降低了[树木名称]的树干生长速率。7月和8月的降水使树干半径生长重新恢复。2018年[树木名称]树干的主要生长季为6 - 8月，比2017年长一个月。不同海拔林分中[树木名称]的树干径向生长与气候因子之间的响应模式一致。生长季早期的干旱抑制了树木的径向生长，而生长季中期和后期的降水对促进树木的径向生长起重要作用。在该地区进行气候重建时，应考虑8月气候因子对年轮宽度的影响。
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