Bao Guang, Liu Zhi-Ye, Liu Na, Wu Mai-Li
Shaanxi Key Laboratory of Disaster Monitoring and Mechanism Simulation, School of Geography and Environment, Baoji University of Arts and Sciences, Baoji 721013, Shaanxi, China.
State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China.
Ying Yong Sheng Tai Xue Bao. 2021 Oct;32(10):3448-3458. doi: 10.13287/j.1001-9332.202110.038.
The Vaganov-Shashkin model was used to simulate the standardized ring-width chrono-logy of var. on the sandy land in Hulunbuir. The results showed that the fitting degree was better in the period before 2000 than that after 2000. Thus, the simulation results before 2000 were selected to analyze the radial growth. The results showed that the main growing season of var. in Hulunbuir Sandy Land was from May to September each year. Temperature had a significant impact on the early and late growth of var. . In the prosperous period of the growing season, insufficient soil moisture was the main factor restricting the radial growth. The radial growth rates of var. in extremely narrow years were more limited by soil moisture than that in extremely wide years. The radial growth rates in the middle of the growing season (from July to August) showed a decreasing trend in wide and narrow years, indicating that the growth of var. was affected by drought stress. Our results were consistent with the characteristics of tree-ring physiological models in semi-arid areas of China. The model was applicable to the radial growth simulation of var. in Hulunbuir Sandy Land.
利用瓦加诺夫-沙沙金模型模拟了呼伦贝尔沙地樟子松的标准化年轮宽度年表。结果表明，2000年以前的拟合度优于2000年以后。因此，选取2000年以前的模拟结果来分析径向生长。结果表明，呼伦贝尔沙地樟子松的主要生长季节为每年5月至9月。温度对樟子松的早期和晚期生长有显著影响。在生长季旺盛期，土壤水分不足是限制径向生长的主要因素。樟子松在极窄年份的径向生长速率比极宽年份受土壤水分的限制更大。生长季中期（7月至8月）的径向生长速率在宽年和窄年都呈下降趋势，表明樟子松的生长受到干旱胁迫的影响。我们的结果与中国半干旱地区树木年轮生理模型的特征一致。该模型适用于呼伦贝尔沙地樟子松的径向生长模拟。
