高级检索+
冯娟, 华亚伟, 张志成, 刘康, 刘波, 张锋. 秦岭南坡镇安油松径向生长-气候因子关系对气温突变的响应[J]. 植物科学学报, 2021, 39(3): 268-277. DOI: 10.11913/PSJ.2095-0837.2021.30268
引用本文: 冯娟, 华亚伟, 张志成, 刘康, 刘波, 张锋. 秦岭南坡镇安油松径向生长-气候因子关系对气温突变的响应[J]. 植物科学学报, 2021, 39(3): 268-277. DOI: 10.11913/PSJ.2095-0837.2021.30268
Feng Juan, Hua Ya-Wei, Zhang Zhi-Cheng, Liu Kang, Liu Bo, Zhang Feng. Response of the relationship between Pinus tabuliformis Carr. radial growth and climatic factors to abrupt changes in temperature in Qinling Zhen'an[J]. Plant Science Journal, 2021, 39(3): 268-277. DOI: 10.11913/PSJ.2095-0837.2021.30268
Citation: Feng Juan, Hua Ya-Wei, Zhang Zhi-Cheng, Liu Kang, Liu Bo, Zhang Feng. Response of the relationship between Pinus tabuliformis Carr. radial growth and climatic factors to abrupt changes in temperature in Qinling Zhen'an[J]. Plant Science Journal, 2021, 39(3): 268-277. DOI: 10.11913/PSJ.2095-0837.2021.30268

秦岭南坡镇安油松径向生长-气候因子关系对气温突变的响应

Response of the relationship between Pinus tabuliformis Carr. radial growth and climatic factors to abrupt changes in temperature in Qinling Zhen'an

  • 摘要: 以陕西镇安木王国家森林公园的油松(Pinus tabuliformis Carr.)为样本,运用响应函数及滑动相关分析等树木年代学方法,研究油松径向生长与气候因子之间的关系及其对气候变化的响应。结果显示:研究区平均气温在1989年发生显著突变,较突变前升高约1.4℃;气温突变后的树轮宽度平均指数1.04,明显大于气温突变前的平均轮宽指数0.87,气温的升高有助于样地油松的生长。相关分析结果表明,油松对温度的需要贯穿于整个生长季,当年3-4月份的温度是对样地油松生长起关键促进作用的因素,而前一年11月份温度的“滞后作用”不可忽略。降水不是该地区油松的主要限制因子,但当年2月份适宜的水分条件有利于树木的生长。气温突变后,滑动相关分析结果显示研究区油松与当年2月份的降水以及当年3-4月份的温度具有稳定的正相关性;树木径向生长与其它月份的气候因子之间的关系有所波动。因此在进行区域气候重建时,应该把树木生长-气候关系随时间变化的波动考虑在内。

     

    Abstract: Using Pinus tabuliformis Carr. samples obtained in the Muwang National Forest Park in Zhen'an, Shaanxi, we studied the relationship between radial growth of P. tabuliformis and climatic factors using response functions, moving correlation analysis, and other dendrochronological methods. We further explored the response of this relationship to climate change. Results showed that: (1)Based on the Mann-Kendall test, average temperature in the study area exhibited a significant abrupt change in 1989, with temperatures 1.4℃ higher than before the change. (2) Based on statistical analysis of standard chronology, the average tree-ring index (1.04) after the abrupt temperature change was significantly greater than the index (0.87) before the change, indicating that the increase in temperature was beneficial for P. tabuliformis growth. (3) Correlation analysis showed that the temperature demands of P. tabuliformis run throughout the entire growing season. The temperature, especially in March and April, had a positive effect on P. tabuliformis growth. The temperature from the previous November also had an effect on matter accumulation in P. tabuliformis. Precipitation was not the major limiting factor for growth, but moderate precipitation in February had a positive effect on radial growth. (4) Precipitation in February and average temperatures in March and April maintained a stable positive correlation with P. tabuliformis in the study area; the relationship between radial growth of the trees and climatic factors fluctuated in the other months. Based on the above results, fluctuations in the tree growth-climate relationship over time should be considered when carrying out regional climate reconstruction research.

     

/

返回文章
返回