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利用采自长白山红松和落叶松分布上限和下限的树轮样本,分别建立树轮宽度差值年表。结果表明:下限红松年表的平均敏感度、树轮宽度指数的年际变率、信噪比等年表特征值比上限年表的高,表明下限红松生长对环境的敏感性大于上限;落叶松年表特征值在不同海拔表现与红松相反。进一步分析发现分布上限和下限的红松生长与气候因子之间的关系不同。下限红松生长与当年气温和上年降水显著相关,上限红松生长与当年气温显著相关,下限落叶松与上年气温显著相关,上限落叶松生长与当年气温和降水显著相关,降水随着海拔的升高而增加,过多的雨水伴随气温下降,进而限制落叶松生长,这表明落叶松生长的重要限制因子是气温,气温对下限落叶松生长产生滞后效应。
Based on the tree-ring samples collected from the upper and lower distributions of Pinus koraiensis and Larix gmelinii in Changbai Mountain, tree-ring width difference chronologies were respectively established. The results showed that the average sensitivity of the lower Pinus koraiensis chronology, the annual variation of the tree ring width index, and the annual chronological characteristics of the signal to noise ratio were higher than the upper chronological table, indicating that the sensitivity of the lower Pinus koraiensis growth to the environment is greater than the upper limit The larch chronological features at different altitudes are opposite to that of Korean pine. Further analysis found that the distribution of upper and lower limits of the Korean pine growth and the relationship between climate factors. The lower Korean pine growth was significantly correlated with the current year rainfall and the previous year precipitation. The upper Korean pine growth was significantly correlated with the current year’s temperature. The lower larch was significantly correlated with the previous year’s temperature. The uppermost larch growth was significantly correlated with the current year’s rainfall and precipitation. , And the excessive rain accompanied with the temperature drop, thus limiting the growth of larch, which indicates that temperature and temperature have a hysteresis effect on the growth of the lower larch.