山西省关帝山林区油松径向生长对气候的响应

Responses of Radial Growth of Pinus Tabuliformis to Climate Change in Guandi Mountain Forest Area of Shanxi Province

测定山西省关帝山林区28棵油松不同树高处的年轮宽度数据,运用ARSTAN软件建立树木年轮标准年表,并对年轮宽度指数与降水量、温度的相关性进行分析。结果表明,油松不同树高处径向生长速率对气候的响应不同。0.0 m和11.0 m树高处年轮径向生长速率因降水量增加或者温度上升而加快;1.3 m树高处年轮径向生长速率因降水量增加而减缓,因温度上升而加快;3.0 m树高处年轮径向生长速率因降水量增加或者温度降低而加快;5.0 m树高处年轮径向生长速率因降水量增加或者温度升高而减缓;8.0 m树高处年轮径向生长速率因降水量增加或当年3月温度升高而加快,因当年7月温度升高而减缓。总体来说,降水量适量增加和温度适度升高,有利于油松的径向生长。

The tree ring width data at different heights of 28 Pinus tabulaeformis in the Guandi Mountain forest area of Shanxi Province was measure,and the standard annual table for tree rings was established using ARSTAN software.The correlation between the ring width index and precipitation,temperature was analyzed.The results showed that the radial growth rate of Pinus tabulaeformis at different heights had different responses to climate.The radial growth rate of tree rings at heights of 0.0 m and 11.0 m increased due to the increase of precipitation or temperature.The radial growth rate of tree rings at a height of 1.3 m slowed down due to the increase of precipitation and increased due to the increase of temperature.The radial growth rate of tree rings at a height of 3.0 m increased due to the increase of precipitation and the decrease of temperature.The radial growth of tree rings at a height of 5.0 m slowed down due to increase of precipitation or temperature.The radial growth rate of tree rings at a height of 8.0 m increased due to the increase of precipitation or the increase of temperature in March,slowed down due to the increase of temperature in July.Overall,a moderate increase in precipitation and a moderate increase in temperature were beneficial for the radial growth of Pinus tabulaeformis.