摘要
以杜香—兴安落叶松为研究对象,运用Pearson相关分析和滑动相关分析等方法,探讨了树木径向生长与气候因子之间的相关关系,并分析了其对气候突变的响应。结果表明:(1)在突变检验中,年降水量没有发生明显的突变现象,年平均气温在1986年出现了突变点,与突变前相比温度升高了1.8℃;突变后的轮宽指数为1.05,明显大于突变前,说明升温促进了兴安落叶松的生长。(2)径向生长对温度的表现较为敏感,特别是受生长季温度的控制较为突出。在气温突变前后,径向生长与气候因子之间的相关性存在明显差异;突变前,径向生长与月气候因子之间的相关性不显著;而突变后,径向生长对降水量、平均气温和平均最低气温响应的敏感性均有所增强;径向生长与当年4月的降水量、当年5月和8月的平均气温、上年9月和8月的平均最低气温均呈显著正相关,而与当年5月的平均最低气温呈极显著正相关。(3)在滑动相关分析中径向生长对气温和降水量的反应都有所增强,特别是在冬季,气温对树木径向生长的负面影响更加明显,而在生长季前期,降水量对树木径向生长的促进作用更加显著。
In the paper,the Ledum palus-Larix gmelinii was taken as the research object.The correlation between radial growth of trees and climate factors was studied,and its response to abrupt climatic changes was analyzed by Pearson and sliding correlation analysis.The results showed that:(1)In the mutation test,the precipitation did not have a significant mutation,but the mean temperature had a significant mutation in 1986,which was 1.8℃higher than that before the mutation.The wheel width index after mutation was 1.05,which was significantly higher than before mutation,indicating that temperature rise also promoted the growth of larch correspondingly.(2)The radial growth of larch was sensitive to temperature,especially the temperature in the growing season.The correlation between chronology and climate factors was significantly different before and after the abrupt temperature change.Before the abrupt change,there was no significant correlation between chronology and climate factors.After the mutation,the sensitivity of chronology to precipitation,mean temperature and minimum temperature increased.It was mainly positively correlated with precipitation in April of the current year,average temperature in May and August of the current year,average minimum temperature in September and August of the previous year,and extremely significantly positively correlated with average minimum temperature in May of the current year.(3)In sliding correlation analysis,the response of radial growth to both temperature and precipitation increased.Especially in winter,the negative effect of air temperature on the radial growth of trees was more obvious,and in the early growing season,precipitation also had a more significant promoting effect on the radial growth of trees.
作者
巴登花
王飞
陈锐
刘杰
杨宇航
BA Deng-hua;WANG Fei;CHEN Rui;LIU Jie;YANG Yu-hang(College of Forestry,Inner Mongolia Agricultural University,Hohhot 010019,China)
出处
《江西农业学报》
CAS
2023年第2期140-147,153,共9页
Acta Agriculturae Jiangxi
基金
国家自然科学基金项目(RZ2100002282)。
关键词
杜香—兴安落叶松
径向生长
气温突变
响应关系
Ledum palus-Larix gmelinii
Radial growth
Abrupt change in temperature
Response
