Xu He-Nian, Wang Jiang-Lin, Peng Xiao-Mei, Ren Zi-Jian
Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China.
University of Chinese Academy of Sciences, Beijing 100049, China.
Ying Yong Sheng Tai Xue Bao. 2022 Aug;33(8):2097-2104. doi: 10.13287/j.1001-9332.202208.006.
To study the responses of radial growth of to climate factors of the different periods (pre-growing season (February-April), growing season (May-July)), and the vulnerability (resistance, ; recovery, ) of to different drought events (precipitation, temperature and the both caused), we used tree ring width data of from 17 sampling sites across the northeastern Tibetan Plateau to analyze the correlation between radial growth and climate factors of different periods, and the vulnerability in different drought events. The results showed that radial growth of had significant positive correlation with drought index and negative correlation with temperature in the growing season (<0.1). The vulnerability of to drought events of different periods had significant difference. In the pre-growing season drought events, the of at low altitude was 2.3% higher than that at high altitude, the of at low altitude was 25.1% lower than that at high altitude. For drought events in the growing season, the of at low altitude was 23.7% lower than that at high altitude, the of at low altitude was 107.1% higher than that at high altitude. The mean (1.68) of in precipitation-caused drought events was strong, while the mean (1.43) of in temperature-caused drought events was strong. The growth of , especially for that at low altitude, would be largely limited by drought caused by global warming in the future.
为研究[树种名称]径向生长对不同时期（生长季前（2月至4月）、生长季（5月至7月））气候因子的响应，以及[树种名称]对不同干旱事件（降水、温度及二者共同导致的干旱）的脆弱性（抗性、[抗性指标名称]；恢复力、[恢复力指标名称]），我们利用青藏高原东北部17个采样点的[树种名称]年轮宽度数据，分析径向生长与不同时期气候因子之间的相关性，以及在不同干旱事件中的脆弱性。结果表明，[树种名称]的径向生长在生长季与干旱指数呈显著正相关，与温度呈负相关（<0.1）。[树种名称]对不同时期干旱事件的脆弱性存在显著差异。在生长季前干旱事件中，低海拔地区[树种名称]的[抗性指标名称]比高海拔地区高2.3%，低海拔地区[树种名称]的[恢复力指标名称]比高海拔地区低25.1%。对于生长季干旱事件，低海拔地区[树种名称]的[抗性指标名称]比高海拔地区低23.7%，低海拔地区[树种名称]的[恢复力指标名称]比高海拔地区高107.1%。降水导致的干旱事件中[恢复力指标名称]的平均值（1.68）较强，而温度导致的干旱事件中[恢复力指标名称]的平均值（1.43）较强。[树种名称]的生长，尤其是低海拔地区的生长，未来将在很大程度上受到全球变暖导致的干旱的限制。
