江苏农博园湿地松径向生长对气候变化的响应

Response of Radial Growth of Pinus elliottii to Climate Change in Jiangsu Agricultural Expo Park

依据树木年代学方法,以江苏农博园湿地松人工林作为研究对象,获取年轮宽度资料,建立年轮宽度年表,探讨影响该树种径向生长的主要气候限制因子。结果表明:湿地松径向生长对气候因子的响应比较敏感,适合用于年轮气候学研究;相关函数分析表明,湿地松径向生长与上年和当年5月平均气温呈显著负相关,与上年5月降水量呈显著正相关。滑动相关进一步表明,升温导致的干旱胁迫是限制湿地松生长的主要原因,如果未来全球气温进一步升高,将对湿地松生长产生不利的影响。

Based on dendrochronology,the annual ring width data of Pinus elliottii plantation in Jiangsu Agricultural Expo Park were obtained,and the annual ring width chronology was established to discuss the main climate limiting factors that affected the radial growth of the species.The results showed that its radial growth was sensitive to climate factors,and Pinus elliottii was suitable for the study of dendroclimatology.The correlation function analysis showed that its radial growth was significantly negatively correlated with the average temperatures in May of previous year and current year,and it was significantly positively correlated with the precipitation in May of previous year.The sliding correlation analysis indicated that drought stress caused by warming was the main reason for limiting its growth.If the global temperature increased further in the future,it would have a negative effect on its growth.